Entering Control Set Points (Chapter 4) Part 3 - WOODWARD 2301D Load Sharing and Speed Control
Entering Control Set Points (Chapter 4) Part 3
C**DISCRETE IN OPTIONS**
01 SEL DI B FUNCTION (1-9) dflt = 3 (1, 9)
Used to select the function for Digital Input #2 (B) terminal 32.
1 Not used
2 Failed speed override (default)
3 Reset
4 Select 2nd dynamics
5 Shutdown external
6 Idle/rated switch
7 Generator Breaker (52G) Isoch
8 Derate KW Load Reference
9 Use Modbus (for 2301D-EC with Modbus)
02 DISPLAY DI B FUNCTION (monitor)
Shows the function of input B.
03 SEL DI C FUNCTION (1-9) dflt = 6 (1, 9)
Used to select the function for digital input 3 (C) terminal 33.
1 Not used
2 Failed speed override
3 Reset
4 Select 2nd dynamics
5 Shutdown external
6 Idle/rated switch (default)
7 Generator Breaker (52G) Isoch
8 Derate KW Load Reference
9 Use Modbus (for 2301D-EC with Modbus)
04 DISPLAY DI C FUNCTION (monitor)
Shows the function of input C.
05 SEL DI D FUNCTION (1-9) dflt = 7 (1, 9)
Used to select the function for digital input 4 (D) terminal 34.
1 Not used
2 Failed speed override
3 Reset
4 Select 2nd dynamics
5 Shutdown external
6 Idle/rated switch
7 Generator Breaker (52G) Isoch (default)
8 Derate KW Load Reference
9 Use Modbus (for 2301D-EC with Modbus)
06 DISPLAY DI D FUNCTION (monitor)
Shows the function of input D.
07 ENABLE R/L WHEN LS dflt=FALSE (FALSE, TRUE)
Set to TRUE to use the Raise Speed/Load and Lower Speed/Load discrete inputs while in isochronous load sharing. Typically this is not used as the control will balance the loads automatically. This value can be used to adjust the speed of a generator bus, so that it can be synchronized to a utility bus.
08 RSE/LWR STOP IDL/RTD RMP dflt=TRUE (FALSE, TRUE)
If set TRUE the raise and lower inputs are active during ramping from idle to rated. During the ramp from idle to rated, if either the Raise or Lower contact is toggled, the ramp will immediately stop. If set FALSE the raise and lower inputs are disabled until rated speed has reached.
D**DISCRETE OUT OPTIONS**
The 2301D, 2301D-EC has four discrete output driver channels. Terminals 41, 42, 43 and 44 are configurable and can be programmed to perform one of the following functions. Any of the four relays can also be programmed to function as a level switch. When programmed as a level switch the relay changes state when the selected parameter reaches the programmed level (energizes when value is higher the programmed level). Level Switch set up is in Service Menu Q**Discrete Out Settings**.
01 IS SHUTDOWN RELAY NC? dflt = TRUE (FALSE, TRUE)
This option sets the logic of the Shutdown Relay. Set to TRUE if the shutdown relay output is normally closed. Set to FALSE if the shutdown relay output is normally open.
02 IS ALARM RELAY NC? dflt = TRUE (FALSE, TRUE)
This option sets the logic of the alarm relay. Set to TRUE if the alarm relay output is normally closed. Set to FALSE if the alarm relay output is normally open.
03 RELAY 1 ENERGIZES (1-12) dflt = 2 (1, 12)
Select one of the following parameters for discrete output at terminal 41.
1 = NOT USED
2 = SHUTDOWN
3 = ALARM
4 = ELEC. OVERSPEED TRIP TEST
5 = START FUEL LIMITER IN CONTROL
6 = SPEED PID IN CONTROL
7 = CIRCUIT BREAKER OPEN COMMAND
8 = OVERLOAD CONTACT
9 = LEVEL SWITCH
10 = CPU FAILURE
11 = FORCE OUTPUTS
12= IN REMOTE SPEED CONTROL
Parameters 11 thru 14 are only applicable for the 2301D-EC with Modbus (see Chapter 8, Communications):
12 = MODBUS RELAY #1
13 = MODBUS RELAY #2
14 = MODBUS RELAY #3
15 = MODBUS RELAY #4
Read More:
Entering Control Set Points (Chapter 4) Part 2 - WOODWARD 2301D Load Sharing and Speed Control
Entering Control Set Points (Chapter 4) Part 1 - WOODWARD 2301D Load Sharing and Speed Control
Description of Operation (Chapter 3) Part 2 - WOODWARD 2301D Load Sharing and Speed Control Description of Operation (Chapter 3) Part 1 - WOODWARD 2301D Load Sharing and Speed Control
04 RELAY 1 SELECTED FOR (monitor)
Displays the relay function for terminal 41.
05 RELAY 2 ENERGIZES (1-12) dflt = 3 (1, 12)
Select one of the following parameters for discrete output at terminal 42 (same as parameters in 03 RELAY 1 ENERGIZES).
06 RELAY 2 SELECTED FOR (monitor)
Displays the relay function for terminal 42.
07 RELAY 3 ENERGIZES (1-12) dflt = 9 (1, 12)
Select one of the following parameters for discrete output at terminal 43 (same as parameters in 03 RELAY 1 ENERGIZES).
08 RELAY 3 SELECTED FOR (monitor)
Displays the relay function for terminal 43.
09 RELAY 4 ENERGIZES (1-12) dflt = 7 (1, 12)
Select one of the following parameters for discrete output at terminal 44 (same as parameters in 03 RELAY 1 ENERGIZES).
10 RELAY 4 SELECTED FOR (monitor)
Displays the relay function for terminal 44.
11 CB OPEN RELAY NORM ENGZD dflt = FALSE (FALSE, TRUE)
When set TRUE sets the circuit breaker open relay to normally closed.
12 CB OPEN ON SHUTDOWN dflt = TRUE (FALSE, TRUE)
When set to TRUE will toggle the discrete output, for one second, if the discrete output is set for function number 7, CIRCUIT BREAKER OPEN COMMAND and an internal shutdown is realized. The toggle state is dependent on the state of 11 CB OPEN RELAY NORM ENGZD. When set to FALSE, the discrete output will do ignore the shutdown.
E**ANALOG INPUT OPTIONS**
01 CONFIGURATION ERROR ? (monitor)
If this value is TRUE, then both analog inputs are configured for the same function. You must configure both analog inputs different from each other (other than a 1, Not Used).
02 SEL AI #1 FUNCTION (1-7) dflt = 4 (1, 7)
Selects the function for the analog input:
1 = NOT USED
2 = REMOTE SPEED SETPOINT
3 = BASELOAD SETPOINT
4 = SYNC INPUT
5 = AUXILIARY SPEED SETPOINT
6 = MANIFOLD AIR PRESSURE LIMITER INPUT
7 = EXTERNAL LOAD SENSOR
03 DISPLAY AI #1 FUNCTION (monitor)
Displays the function for analog input #1.
04 SEL AI #1 TYPE (1-3) dflt = 1 (1, 3)
Sets the type of input used:
1 = 4–20 mA
2 = 0–5 Volt
3 = ±2.5 Volt
05 DISPLAY AI #1 TYPE (monitor)
Displays the type of input for analog input #1.
06 USE INPUT #1 FAIL TRIP dflt = FALSE (FALSE, TRUE)
When set TRUE a failure of the input signal gives a major alarm, which shutdowns the engine. When set FALSE only an alarm is given, and the engine is not stopped.
07 SEL AI #2 FUNCTION (1-7) dflt = 3 (1, 7)
Selects the function for the analog input:
1 = NOT USED
2 = REMOTE SPEED SETPOINT
3 = BASELOAD SETPOINT
4 = SYNC INPUT
5 = AUXILIARY SPEED SETPOINT
6 = MANIFOLD AIR PRESSURE LIMITER INPUT
7 = EXTERNAL LOAD SENSOR
08 DISPLAY AI #2 FUNCTION (monitor)
Displays the function for analog input #2.
09 SEL AI #2 TYPE (1-4) dflt = 1 (1, 4)
Sets the type of input used:
1 = 4–20 mA
2 = 0–5 Volt
3 = ±2.5 Volt
10 DISPLAY AI #2 TYPE (monitor)
Displays the type of input for analog input #2.
11 USE INPUT #2 FAIL TRIP dflt = FALSE (FALSE, TRUE)
When set TRUE a failure of the input signal gives a major alarm, which
shutdowns the engine. When set FALSE only an alarm is given, and the engine
is not stopped.
F**ACTUATOR OUT OPTIONS**
01 ACTUATOR OUT TYPE (1-3) dflt = 1 (1, 3)
Selects the current range of the actuator used:
1 = 0-200 mA
2 = 4–20 mA
3 = 0-20 mA
02 DISPLAY ACTUATOR TYPE (monitor)
Displays what current range is set for the actuator.
03 REVERSE ACTING ACTUATOR dflt = FALSE (FALSE, TRUE)
Set to TRUE for reverse-acting actuators and FALSE for forward-acting actuators. Forward-acting actuators require current increase to increase fuel. Reverse-acting actuators require current decrease to increase fuel (reverseacting actuators should always incorporate a mechanical ballhead backup
governor, such as the Woodward EGB).
04 SD ACT ON INTERNAL SD dflt = TRUE (FALSE, TRUE)
Set to TRUE will cause the fuel demand to go to 0% on any internal shutdown (Forward acting or reverse acting). Set to FALSE will cause the fuel demand to go to 100% on any internal shutdown. Menu item 03 REVERSE ACTING ACTUATOR must be set to TRUE and a mechanical ballhead backup governor must be present before this function will work.
Exiting the Configure Mode
To exit out of the Configure Mode, click on the “Reset” icon . Make sure to save the values. The control will then reboot, which takes about 20-30 seconds.
Service Menu Descriptions
The service menu’s are meant to monitor and tune the engine, while the engine is running. Verify all of the service menu’s before starting the engine.
A**DISPLAY MENU**
This is a display group for general monitoring of the engine/generator.
01 ENGINE SPEED (RPM) (monitor)
Displays actual engine rpm.
02 CALC GENERATOR FREQ (Hz) (monitor)
Displays the engine rpm converted to generator output frequency.
03 SPEED REFERENCE (RPM) (monitor)
The speed reference or desired speed.
04 FUEL DEMAND (%) (monitor)
Represents the engine fuel actuator output. 0–100%.
05 SPEED REF BIAS SUM (RPM) (monitor)
Displays the total speed bias into the summing junction.
06 LOAD BIAS (RPM) (monitor)
The speed bias for the load sharing and droop section of the control.
07 SYNC BIAS (RPM) (monitor)
The speed bias from the speed and phase match device input to the control.
08 BASE LOAD REF (KW) (monitor)
Displays the KW reference value of the baseload mode.
09 GENERATOR OUT (KW) (monitor)
Displays the generator load in kilowatts.
10 LOAD SIGNAL OUT (Vdc) (monitor)
Indicates the generator kW in units of load gain voltage. The value will vary from
0.0 to the value entered in H**LOAD SETTINGS**, LOAD GAIN VOLTAGE when the generator load varies from 0 to rated KW.
11 FUEL CONTROL MODE: (monitor)
Gives the control loop in control of actuator output. Can be one of the following:
Minimum, Speed, Start Limiter, Maximum, Torque Limiter, MAP Limiter, Idle Fuel Limiter.
12 LOAD CONTROL PARAMETER: (monitor)
Gives the control mode in control of the engine load. Can be one of the following:
Breaker Open, Unloaded, Load Sharing, Load Ramp, Base Load.
13 ANALOG INPUT #1 = (monitor)
Displays the value of the analog input #1 in milliamps or volts.
14 ANALOG INPUT #2 = (monitor)
Displays the value of the analog input #2 in milliamps or volts.
B**DISPLAY LOAD INFO**
01 LOAD SENSOR INPUT (KW) (monitor)
Displays the generator load in kW.
02 LOAD SENSOR (%) (monitor)
Displays the load in percentage.
03 LOAD SHARING BIAS (RPM) (monitor)
This is the speed bias to the reference from the load sharing.
04 LOAD SIGNAL OUT (Vdc) (monitor)
The generator kW converted to load gain volts.
05 SYSTEM LOAD 0-3(Vdc) (monitor)
The total load voltage of all units on-line.
06 LOAD SHARING BIAS (%) (monitor)
This is the error signal to the speed reference from the load sharing.
C**SHUTDOWNS**
01 SHUTDOWN STATUS (monitor)
The status shows TRUE when a shutdown is active.
02 FIRST SHUTDOWN (monitor)
This will display a message of possible shutdown conditions:
o NO SHUTDOWNS
o OVERSPEED
o MPU FAIL
o ANALOG INPUT #1 FAIL
o ANALOG INPUT #2 FAIL
o TEST MODE
o EXTERNAL SHUTDOWN
o AI CONFIGURATION ERROR
If the control is in the “Enable Manual Driver Test” mode, the output will display “TEST MODE” and the control will be in the shutdown mode.
03 OVERSPEED (monitor)
When TRUE indicates an engine overspeed.
04 MPU FAIL (monitor)
When TRUE indicates an MPU failure.
05 ANALOG INPUT #1 FAIL (monitor)
When TRUE indicates a signal input failure.
06 ANALOG INPUT #2 FAIL (monitor)
When TRUE indicates a signal input failure.
07 TEST MODE (monitor)
When TRUE indicates that the Test Mode is active.
08 EXTERNAL SHUTDOWN (monitor)
Indicates that an external shutdown is active (one of the digital inputs is configured for an external shutdown).
09 AI CONFIGURATION ERROR (monitor)
When TRUE, indicates that both analog inputs are configured for the same function.
10 RESET SHUTDOWN dflt = FALSE (FALSE, TRUE)
This switch resets the shutdown latches.
D**ALARMS**
01 ALARM STATUS (monitor)
The status shows TRUE when an alarm is active.
02 FIRST ALARM (monitor)
This will display a message of possible alarm conditions:
o NO ALARMS
o ANALOG INPUT #1 FAIL
o ANALOG INPUT #2 FAIL
o LOAD SENSOR FAIL
o LOAD SHARE LINE FAIL
03 ANALOG INPUT #1 FAIL (monitor)
When TRUE indicates a signal input failure.
Analog Input #1 will indicate a failure if the following conditions exist:
Set for 4–20 mA, 2 mA > value < 22 mA
Set for 0–5 Vdc, 0.001 Vdc > value < 5.5 Vdc
Set for ±2.5 Vdc, –2.73 Vdc > value < 2.73 Vdc
04 ANALOG INPUT #2 FAIL (monitor)
When TRUE indicates a signal input failure.
Analog Input #2 will indicate a failure if the following conditions exist:
Set for 4–20 mA, 2 mA > value < 22 mA
Set for 0–5 Vdc, 0.001 Vdc > value < 5.5 Vdc
Set for ±2.5 Vdc, –2.73 Vdc > value < 2.73 Vdc
05 LOAD SENSOR FAIL (monitor)
When TRUE indicates a load sensor failure.
A Load Sensor failure is indicated when the CT current drops below –0.15 mA.
06 LOAD SHARE LINE FAIL (monitor)
When TRUE indicates a load share line failure.
07 RESET ALARMS dflt = FALSE (FALSE, TRUE)
This switch resets the alarm status.
E**DISPLAY DIGITAL I/O**
This section has no adjustments to set. It is used only for display of OPEN or CLOSED status of discrete inputs and the ON or OFF status of the discrete outputs.
01 CLOSE RUN/OPEN SHTDWN A (monitor)
The status of discrete input A.
02 DISCRETE INPUT B (monitor)
The status of discrete input B.
03 DISCRETE INPUT C (monitor)
The status of discrete input C.
04 DISCRETE INPUT D (monitor)
The status of discrete input D.
05 RAISE SPEED/LOAD E (monitor)
The status of discrete input E.
06 LOWER SPEED/LOAD F (monitor)
The status of discrete input F.
07 LOAD GENERATOR G (monitor)
The status of discrete input G.
08 SELECT BASE LOAD H (monitor)
The status of discrete input H.
09 DISCRETE OUTPUT #1 (monitor)
The status of discrete output DO-1.
10 DISCRETE OUTPUT #2 (monitor)
The status of discrete output DO-2.
11 DISCRETE OUTPUT #3 (monitor)
The status of discrete output DO-3.
12 DISCRETE OUTPUT #4 (monitor)
The status of discrete output DO-4.
13 INTERNAL CB AUX RELAY (monitor)
The status of discrete output driving the internal load sharing relay.
F**DISPLAY ANALOG I/O**
This section displays the analog inputs to and the outputs from the control.
01 SPEED SENSOR INPUT (RPM) (monitor)
Displays actual engine speed.
02 LOAD SENSOR INPUT (KW) (monitor)
Displays the generator load in kilowatts.
03 ANIN #1, INPUT TYPE (monitor)
Displays one of the following to indicate the input range selected for input 1:
4–20 mA
0–5 V
± 2.5 V
1–5 V
04 ANIN #1 (UNITS) (monitor)
Displays the units of the input type above (volts or mA) of the analog Input #1.
05 ANIN #2, INPUT TYPE (monitor)
Displays one of the following string to indicate the input range selected for input 2:
4–20 mA
0–5 V
±2.5 V
06 ANIN #2 (UNITS) (monitor)
Displays the units of the input type above (volts or mA) of the analog Input #2.
07 LOAD SHARING LINES (Vdc) (monitor)
Indicates the voltage present at terminals 10 and 11.
08 LOAD SHARING BIAS SIG (%) (monitor)
The error signal to the speed reference from the load sharing and/or droop circuitry.
09 ACTUATOR CURRENT (mA) (monitor)
The calculated actuator output current in milliamps. This calculation is based on the percent fuel demand and the actuator type/range selected. External wiring may effect the accuracy of the actual current.
10 ANALOG OUT 1 (%) (monitor)
The output at terminals 16 and 17. 0% is 4 mA, 100% is 20 mA.
11 LOAD SIGNAL (Vdc) (monitor)
The generator kW converted to load gain volts.
G**SPEED SETTINGS**
Speed settings are the parameters that affect the prime mover speed reference.
01 START SPEED (RPM) dflt = 400.00 (1.00, 2100)
The initial speed reference for the speed control before starting. Start speed must be set above cranking speed and below the speed achieved with the start fuel limit setting (light-off speed). A ramp from start speed to idle or rated, whichever is selected, begins when the engine accelerates to start speed. The ramp time is the accel ramp time setting, when going to the rated speed setpoint. The ramp time is the decel ramp time setting, when going to the idle speed setpoint.
02 RAISE SPEED LIMIT (RPM) dflt = 1000.00 (0.00, 4000.00)
The maximum speed reference setting when the raise switch is closed. It is normally set at the speed at which the engine operates at full load if the Droop mode is used, or at the high limit of the speed trim function.
03 LOWER SPEED LIMIT (RPM) dflt = 800.00 (0.00, 4000.00)
The minimum speed reference setting when the lower switch is closed. It is normally set at the minimum operating speed of the engine, or at the minimum limit of the speed trim function.
04 IDLE SPEED (RPM) dflt = 600.00 (0.00, 4000.00)
This is the speed that the speed reference ramp goes to when the close for rated discrete input is OPEN. It is normally the speed at which the engine is operated at start-up. It is also used during cool down.
05 ACCEL RAMP TIME (SEC) dflt = 20.00 (1.00, 300.00)
The time required for the control to ramp the engine speed from idle speed to rated speed. The ramp is started whenever the Idle/Rated contact is closed.
06 DECEL RAMP TIME (SEC) dflt = 20.00 (1.00, 300.00)
The time required for the control to ramp the engine speed from rated speed to idle speed. The ramp is started whenever the Idle/Rated contact is opened.
07 SPEED TRIM INC TIME (SEC) dflt = 30.00 (1.00, 300.00)
This is the time for the speed reference to ramp from the lower speed limit to the raise speed limit when using the Raise Speed switch input.
08 SPEED TRIM DEC TIME (SEC) dflt = 30.00 (1.00, 300.00)
This is the time for the speed reference to ramp from the raise speed limit to the lower speed limit when using the Lower Speed switch input.
09 IDLE DROOP BREAKPOINT dflt = 40.00 (0.50, 100.00)
Normally set above the control output obtained when the engine is unloaded and at low idle. When the output of the control drops below this setting or goes to minimum fuel during rapid engine deceleration, Idle droop (described below) raises the speed reference. This brings the engine back under control sooner and reduces speed undershoot. Typically, Idle Droop is used for marine applications, or mechanical load applications. Speed undershoot may occur because the time required for the control to return to the new fuel setting is dependent on control dynamics and linkage adjustment.
10 IDLE DROOP (%) dflt = 5.00 (0.00, 100.00)
The percentage is based on the difference between the Idle Speed setpoint and the Rated Speed setpoint, when it drops below the idle droop breakpoint. To enable idle droop, the parameter 6 Enable Idle Droop at Configure Menu
A**Speed Control Functions** should be set TRUE.
11 DELAY TIME IDLE TO RATED dflt = 5.00 (0.00, 600.00)
The delay time for the automatic idle to rated switch. The engine will run for this time at idle speed before it ramps to rated speed. In configure menu A**Speed Control Functions** parameter 17 Enable Auto Idle/Rated must be set TRUE.
H**Dynamics #1**
Dynamic adjustments are settings that affect the stability and transient performance of the engine. Two sets of dynamics are provided. To disable the second set of dynamics go to I**DYNAMICS 2** and set the first prompt (Enable Dynamics 2 w/CB) to FALSE. The dynamics being used for control are selected by the CB Aux contact input. The control uses the 1st dynamics when the CB Aux contact input is open, and it uses the 2nd dynamics when the contact is closed.
01 IDLE PROP GAIN 1 dflt = 1.00 (0.001, 10.00)
Determines how fast the control responds to an error in engine speed from the speed-reference setting. The gain is set to provide stable control of the engine at idle speed. As idle speed is increased from idle speed to rated speed, this value will change linearly from this value to the Rated Prop Gain value.
02 RATED PROP GAIN 1 dflt = 2.00 (0.001, 100.00)
Determines how fast the control responds to an error in engine speed from the speed-reference setting. The gain is set to provide stable control of the engine at rated speed and light or unloaded conditions. The gain value is linear between the Idle Prop Gain tunable and the Rated Prop Gain tunable.
03 RESET 1 dflt = 1.00 (0.01, 100.00)
Compensates for the lag time of the engine. It adjusts the time required for the control to return the speed to zero error after a disturbance. Reset is adjusted to prevent slow hunting and to minimize speed overshoot after a load disturbance.
04 ACTUATOR COMPENSATION 1 dflt = 0.10 (0.01, 100.00)
Compensates for the actuator and fuel system time constant. Increasing Compensation increases actuator activity and transient performance.
05 WINDOW WIDTH 1 (RPM) dflt = 60.00 (1.00, 200.00)
This is the magnitude (in rpm) of speed error at which the control automatically switches to fast response. The control uses the absolute value of speed error to make this switch. The absolute value is the difference between the speed reference and the speed. A window width that is too narrow results in cycling that always factors in the gain ratio (see Figure 4-2).
06 GAIN RATIO 1 dflt = 1.00 (1.00, 10.00)
The ratio of the gain setting at steady state to the gain setting during transient conditions. The gain ratio operates in conjunction with the window width and gain adjustments by multiplying the gain set point by the gain ratio when the speed error is greater than the window width. This makes the control dynamics fast enough to minimize engine-speed overshoot on start-up and to reduce the magnitude of speed error when loads are changing. This allows a lower gain at steady state for better stability and reduced steady-state actuator linkage movement (see Figure below).
07 GAIN SLOPE dflt = 0.00 (-50.00, 50.00)
Sets the percent output above which the Gain Slope becomes effective. It should usually be set just above the minimum load output.
08 GAIN BREAKPOINT dflt = 20.0 (0.00, 100.00)
Changes Gain as a function of actuator output. Since actuator output is proportional to engine load, this makes Gain a function of engine load. Gain Slope operates in conjunction with the Gain Slope Breakpoint adjustment to increase (or decrease) Gain when percent Actuator Output is greater than the breakpoint. This compensates for systems having high (or low) gain at low load levels. This allows the Gain setting to be lower at light or no load for engine stability, yet provide good control performance under loaded conditions.
09 SPEED FILTER FREQ 1 (HZ) dflt = 12.00 (4.00, 20.00)
Adjusts the cutoff frequency of a low-pass filter used on the engine speed sensing input (see Figure below). To use this feature set the cutoff frequency below 15.9 Hz. The filter is used to attenuate engine firing frequencies. To calculate the desired filter cutoff point, use the following formulas:
As the filter frequency is reduced, steady state stability improves but transient performance may worsen. As the filter frequency is increased, steady state stability worsens but transient performance may improve.
10 BUMP ACT TRIGGER (T THEN F) dflt = FALSE (FALSE, TRUE)
Allows you to test your dynamics settings by temporarily applying a decreased fuel demand transient to stimulate a control response. Both the magnitude (Act Bump Level) and duration (Act Bump Duration) of the transient may be set. The actuator bump must be enabled in the ACTUATOR BUMP menu. To initiate an actuator bump, toggle Bump Act to TRUE then back to FALSE while the engine
is operating in a normal steady state loaded or unloaded condition. Figure below illustrates prime mover starts with the RAMP TIME set to minimum (no ramp), step loadings at four different RESET settings, and stable, steady-state running conditions. These are typical performance curves on a naturally aspirated (non-turbocharged) diesel engine.
IMPORTANT: BUMP ENABLE must be set TRUE to enable the BUMP ACT function.
See the ACTUATOR BUMP SETUP menu.
I**Dynamics #2**
The Dynamics 2 control parameters are adjusted the same as Dynamics 1 described above. To enable the use of two sets of dynamics, it is necessary to set Enable 2nd DYNAMICS w/CB below to TRUE. These parameters are in control only when the CB Aux contact input is closed or if a discrete input is configured for Select 2nd Dynamics and this input is closed.
IMPORTANT: I**Dynamics #2** parameters 04 thru 10 have the same effect on speed control response as H**Dynamics #1** parameters 01 thru 07 described above.
01 ENABLE DYNAMICS 2 W/CB dflt = FALSE (FALSE, TRUE)
02 DELAY DYN 2 ENABLE (SEC) dflt = 0.00 (0.00, 20.00)
This is the delay time before dynamics #2 are used by the speed control when the "CB Aux Droop contact" or "Select 2nd Dynamics" input is activated.
03 DELAY DYN 1 ENABLE (SEC) dflt = 0.00 (0.00, 20.00)
This is the delay time before Dynamics #1 are used by the speed control after the "CB Aux Droop contact" or "Select 2nd Dynamics" input is de-activated.
04 PROP GAIN 2 dflt = 2.00 (0.001, 100.00)
05 RESET 2 dflt = 1.00 (0.01, 100.00)
06 ACTUATOR COMPENSATION 2 dflt = 0.10 (0.01, 100.00)
07 WINDOW WIDTH 2 (RPM) dflt = 60.00 (1.00, 200.00)
08 GAIN RATIO 2 dflt = 1.00 (1.00, 10.00)
09 GAIN SLOPE 2 dflt = 0.00 (-50.00, 50.00)
10 GAIN BREAKPOINT 2 dflt = 20.0 (0.00, 100.00)
11 SPEED FILTER FREQ 2 (HZ) dflt = 12.00 (4.00, 20.00)
12 BUMP ACT TRIG (T THEN F) dflt = FALSE (FALSE, TRUE)
Read More:
Installation (Chapter 2) Part 2 - WOODWARD 2301D Load Sharing and Speed Control
Installation (Chapter 2) Part 1 - 2301D WOODWARD Load Sharing and Speed Control
Plant Wiring Diagram - 2301D Load Sharing and Speed Control
General Information (Chapter 1) - WOODWARD 2301D Load Sharing and Speed Control
BLOG.TEKNISI
C**DISCRETE IN OPTIONS**
01 SEL DI B FUNCTION (1-9) dflt = 3 (1, 9)
Used to select the function for Digital Input #2 (B) terminal 32.
1 Not used
2 Failed speed override (default)
3 Reset
4 Select 2nd dynamics
5 Shutdown external
6 Idle/rated switch
7 Generator Breaker (52G) Isoch
8 Derate KW Load Reference
9 Use Modbus (for 2301D-EC with Modbus)
02 DISPLAY DI B FUNCTION (monitor)
Shows the function of input B.
03 SEL DI C FUNCTION (1-9) dflt = 6 (1, 9)
Used to select the function for digital input 3 (C) terminal 33.
1 Not used
2 Failed speed override
3 Reset
4 Select 2nd dynamics
5 Shutdown external
6 Idle/rated switch (default)
7 Generator Breaker (52G) Isoch
8 Derate KW Load Reference
9 Use Modbus (for 2301D-EC with Modbus)
04 DISPLAY DI C FUNCTION (monitor)
Shows the function of input C.
05 SEL DI D FUNCTION (1-9) dflt = 7 (1, 9)
Used to select the function for digital input 4 (D) terminal 34.
1 Not used
2 Failed speed override
3 Reset
4 Select 2nd dynamics
5 Shutdown external
6 Idle/rated switch
7 Generator Breaker (52G) Isoch (default)
8 Derate KW Load Reference
9 Use Modbus (for 2301D-EC with Modbus)
06 DISPLAY DI D FUNCTION (monitor)
Shows the function of input D.
07 ENABLE R/L WHEN LS dflt=FALSE (FALSE, TRUE)
Set to TRUE to use the Raise Speed/Load and Lower Speed/Load discrete inputs while in isochronous load sharing. Typically this is not used as the control will balance the loads automatically. This value can be used to adjust the speed of a generator bus, so that it can be synchronized to a utility bus.
08 RSE/LWR STOP IDL/RTD RMP dflt=TRUE (FALSE, TRUE)
If set TRUE the raise and lower inputs are active during ramping from idle to rated. During the ramp from idle to rated, if either the Raise or Lower contact is toggled, the ramp will immediately stop. If set FALSE the raise and lower inputs are disabled until rated speed has reached.
D**DISCRETE OUT OPTIONS**
The 2301D, 2301D-EC has four discrete output driver channels. Terminals 41, 42, 43 and 44 are configurable and can be programmed to perform one of the following functions. Any of the four relays can also be programmed to function as a level switch. When programmed as a level switch the relay changes state when the selected parameter reaches the programmed level (energizes when value is higher the programmed level). Level Switch set up is in Service Menu Q**Discrete Out Settings**.
01 IS SHUTDOWN RELAY NC? dflt = TRUE (FALSE, TRUE)
This option sets the logic of the Shutdown Relay. Set to TRUE if the shutdown relay output is normally closed. Set to FALSE if the shutdown relay output is normally open.
02 IS ALARM RELAY NC? dflt = TRUE (FALSE, TRUE)
This option sets the logic of the alarm relay. Set to TRUE if the alarm relay output is normally closed. Set to FALSE if the alarm relay output is normally open.
03 RELAY 1 ENERGIZES (1-12) dflt = 2 (1, 12)
Select one of the following parameters for discrete output at terminal 41.
1 = NOT USED
2 = SHUTDOWN
3 = ALARM
4 = ELEC. OVERSPEED TRIP TEST
5 = START FUEL LIMITER IN CONTROL
6 = SPEED PID IN CONTROL
7 = CIRCUIT BREAKER OPEN COMMAND
8 = OVERLOAD CONTACT
9 = LEVEL SWITCH
10 = CPU FAILURE
11 = FORCE OUTPUTS
12= IN REMOTE SPEED CONTROL
Parameters 11 thru 14 are only applicable for the 2301D-EC with Modbus (see Chapter 8, Communications):
12 = MODBUS RELAY #1
13 = MODBUS RELAY #2
14 = MODBUS RELAY #3
15 = MODBUS RELAY #4
Read More:
Entering Control Set Points (Chapter 4) Part 2 - WOODWARD 2301D Load Sharing and Speed Control
Entering Control Set Points (Chapter 4) Part 1 - WOODWARD 2301D Load Sharing and Speed Control
Description of Operation (Chapter 3) Part 2 - WOODWARD 2301D Load Sharing and Speed Control Description of Operation (Chapter 3) Part 1 - WOODWARD 2301D Load Sharing and Speed Control
04 RELAY 1 SELECTED FOR (monitor)
Displays the relay function for terminal 41.
05 RELAY 2 ENERGIZES (1-12) dflt = 3 (1, 12)
Select one of the following parameters for discrete output at terminal 42 (same as parameters in 03 RELAY 1 ENERGIZES).
06 RELAY 2 SELECTED FOR (monitor)
Displays the relay function for terminal 42.
07 RELAY 3 ENERGIZES (1-12) dflt = 9 (1, 12)
Select one of the following parameters for discrete output at terminal 43 (same as parameters in 03 RELAY 1 ENERGIZES).
08 RELAY 3 SELECTED FOR (monitor)
Displays the relay function for terminal 43.
09 RELAY 4 ENERGIZES (1-12) dflt = 7 (1, 12)
Select one of the following parameters for discrete output at terminal 44 (same as parameters in 03 RELAY 1 ENERGIZES).
10 RELAY 4 SELECTED FOR (monitor)
Displays the relay function for terminal 44.
11 CB OPEN RELAY NORM ENGZD dflt = FALSE (FALSE, TRUE)
When set TRUE sets the circuit breaker open relay to normally closed.
12 CB OPEN ON SHUTDOWN dflt = TRUE (FALSE, TRUE)
When set to TRUE will toggle the discrete output, for one second, if the discrete output is set for function number 7, CIRCUIT BREAKER OPEN COMMAND and an internal shutdown is realized. The toggle state is dependent on the state of 11 CB OPEN RELAY NORM ENGZD. When set to FALSE, the discrete output will do ignore the shutdown.
E**ANALOG INPUT OPTIONS**
01 CONFIGURATION ERROR ? (monitor)
If this value is TRUE, then both analog inputs are configured for the same function. You must configure both analog inputs different from each other (other than a 1, Not Used).
02 SEL AI #1 FUNCTION (1-7) dflt = 4 (1, 7)
Selects the function for the analog input:
1 = NOT USED
2 = REMOTE SPEED SETPOINT
3 = BASELOAD SETPOINT
4 = SYNC INPUT
5 = AUXILIARY SPEED SETPOINT
6 = MANIFOLD AIR PRESSURE LIMITER INPUT
7 = EXTERNAL LOAD SENSOR
03 DISPLAY AI #1 FUNCTION (monitor)
Displays the function for analog input #1.
04 SEL AI #1 TYPE (1-3) dflt = 1 (1, 3)
Sets the type of input used:
1 = 4–20 mA
2 = 0–5 Volt
3 = ±2.5 Volt
05 DISPLAY AI #1 TYPE (monitor)
Displays the type of input for analog input #1.
06 USE INPUT #1 FAIL TRIP dflt = FALSE (FALSE, TRUE)
When set TRUE a failure of the input signal gives a major alarm, which shutdowns the engine. When set FALSE only an alarm is given, and the engine is not stopped.
07 SEL AI #2 FUNCTION (1-7) dflt = 3 (1, 7)
Selects the function for the analog input:
1 = NOT USED
2 = REMOTE SPEED SETPOINT
3 = BASELOAD SETPOINT
4 = SYNC INPUT
5 = AUXILIARY SPEED SETPOINT
6 = MANIFOLD AIR PRESSURE LIMITER INPUT
7 = EXTERNAL LOAD SENSOR
08 DISPLAY AI #2 FUNCTION (monitor)
Displays the function for analog input #2.
09 SEL AI #2 TYPE (1-4) dflt = 1 (1, 4)
Sets the type of input used:
1 = 4–20 mA
2 = 0–5 Volt
3 = ±2.5 Volt
10 DISPLAY AI #2 TYPE (monitor)
Displays the type of input for analog input #2.
11 USE INPUT #2 FAIL TRIP dflt = FALSE (FALSE, TRUE)
When set TRUE a failure of the input signal gives a major alarm, which
shutdowns the engine. When set FALSE only an alarm is given, and the engine
is not stopped.
F**ACTUATOR OUT OPTIONS**
01 ACTUATOR OUT TYPE (1-3) dflt = 1 (1, 3)
Selects the current range of the actuator used:
1 = 0-200 mA
2 = 4–20 mA
3 = 0-20 mA
02 DISPLAY ACTUATOR TYPE (monitor)
Displays what current range is set for the actuator.
03 REVERSE ACTING ACTUATOR dflt = FALSE (FALSE, TRUE)
Set to TRUE for reverse-acting actuators and FALSE for forward-acting actuators. Forward-acting actuators require current increase to increase fuel. Reverse-acting actuators require current decrease to increase fuel (reverseacting actuators should always incorporate a mechanical ballhead backup
governor, such as the Woodward EGB).
04 SD ACT ON INTERNAL SD dflt = TRUE (FALSE, TRUE)
Set to TRUE will cause the fuel demand to go to 0% on any internal shutdown (Forward acting or reverse acting). Set to FALSE will cause the fuel demand to go to 100% on any internal shutdown. Menu item 03 REVERSE ACTING ACTUATOR must be set to TRUE and a mechanical ballhead backup governor must be present before this function will work.
Exiting the Configure Mode
To exit out of the Configure Mode, click on the “Reset” icon . Make sure to save the values. The control will then reboot, which takes about 20-30 seconds.
Service Menu Descriptions
The service menu’s are meant to monitor and tune the engine, while the engine is running. Verify all of the service menu’s before starting the engine.
A**DISPLAY MENU**
This is a display group for general monitoring of the engine/generator.
01 ENGINE SPEED (RPM) (monitor)
Displays actual engine rpm.
02 CALC GENERATOR FREQ (Hz) (monitor)
Displays the engine rpm converted to generator output frequency.
03 SPEED REFERENCE (RPM) (monitor)
The speed reference or desired speed.
04 FUEL DEMAND (%) (monitor)
Represents the engine fuel actuator output. 0–100%.
05 SPEED REF BIAS SUM (RPM) (monitor)
Displays the total speed bias into the summing junction.
06 LOAD BIAS (RPM) (monitor)
The speed bias for the load sharing and droop section of the control.
07 SYNC BIAS (RPM) (monitor)
The speed bias from the speed and phase match device input to the control.
08 BASE LOAD REF (KW) (monitor)
Displays the KW reference value of the baseload mode.
09 GENERATOR OUT (KW) (monitor)
Displays the generator load in kilowatts.
10 LOAD SIGNAL OUT (Vdc) (monitor)
Indicates the generator kW in units of load gain voltage. The value will vary from
0.0 to the value entered in H**LOAD SETTINGS**, LOAD GAIN VOLTAGE when the generator load varies from 0 to rated KW.
11 FUEL CONTROL MODE: (monitor)
Gives the control loop in control of actuator output. Can be one of the following:
Minimum, Speed, Start Limiter, Maximum, Torque Limiter, MAP Limiter, Idle Fuel Limiter.
12 LOAD CONTROL PARAMETER: (monitor)
Gives the control mode in control of the engine load. Can be one of the following:
Breaker Open, Unloaded, Load Sharing, Load Ramp, Base Load.
13 ANALOG INPUT #1 = (monitor)
Displays the value of the analog input #1 in milliamps or volts.
14 ANALOG INPUT #2 = (monitor)
Displays the value of the analog input #2 in milliamps or volts.
B**DISPLAY LOAD INFO**
01 LOAD SENSOR INPUT (KW) (monitor)
Displays the generator load in kW.
02 LOAD SENSOR (%) (monitor)
Displays the load in percentage.
03 LOAD SHARING BIAS (RPM) (monitor)
This is the speed bias to the reference from the load sharing.
04 LOAD SIGNAL OUT (Vdc) (monitor)
The generator kW converted to load gain volts.
05 SYSTEM LOAD 0-3(Vdc) (monitor)
The total load voltage of all units on-line.
06 LOAD SHARING BIAS (%) (monitor)
This is the error signal to the speed reference from the load sharing.
C**SHUTDOWNS**
01 SHUTDOWN STATUS (monitor)
The status shows TRUE when a shutdown is active.
02 FIRST SHUTDOWN (monitor)
This will display a message of possible shutdown conditions:
o NO SHUTDOWNS
o OVERSPEED
o MPU FAIL
o ANALOG INPUT #1 FAIL
o ANALOG INPUT #2 FAIL
o TEST MODE
o EXTERNAL SHUTDOWN
o AI CONFIGURATION ERROR
If the control is in the “Enable Manual Driver Test” mode, the output will display “TEST MODE” and the control will be in the shutdown mode.
03 OVERSPEED (monitor)
When TRUE indicates an engine overspeed.
04 MPU FAIL (monitor)
When TRUE indicates an MPU failure.
05 ANALOG INPUT #1 FAIL (monitor)
When TRUE indicates a signal input failure.
06 ANALOG INPUT #2 FAIL (monitor)
When TRUE indicates a signal input failure.
07 TEST MODE (monitor)
When TRUE indicates that the Test Mode is active.
08 EXTERNAL SHUTDOWN (monitor)
Indicates that an external shutdown is active (one of the digital inputs is configured for an external shutdown).
09 AI CONFIGURATION ERROR (monitor)
When TRUE, indicates that both analog inputs are configured for the same function.
10 RESET SHUTDOWN dflt = FALSE (FALSE, TRUE)
This switch resets the shutdown latches.
D**ALARMS**
01 ALARM STATUS (monitor)
The status shows TRUE when an alarm is active.
02 FIRST ALARM (monitor)
This will display a message of possible alarm conditions:
o NO ALARMS
o ANALOG INPUT #1 FAIL
o ANALOG INPUT #2 FAIL
o LOAD SENSOR FAIL
o LOAD SHARE LINE FAIL
03 ANALOG INPUT #1 FAIL (monitor)
When TRUE indicates a signal input failure.
Analog Input #1 will indicate a failure if the following conditions exist:
Set for 4–20 mA, 2 mA > value < 22 mA
Set for 0–5 Vdc, 0.001 Vdc > value < 5.5 Vdc
Set for ±2.5 Vdc, –2.73 Vdc > value < 2.73 Vdc
04 ANALOG INPUT #2 FAIL (monitor)
When TRUE indicates a signal input failure.
Analog Input #2 will indicate a failure if the following conditions exist:
Set for 4–20 mA, 2 mA > value < 22 mA
Set for 0–5 Vdc, 0.001 Vdc > value < 5.5 Vdc
Set for ±2.5 Vdc, –2.73 Vdc > value < 2.73 Vdc
05 LOAD SENSOR FAIL (monitor)
When TRUE indicates a load sensor failure.
A Load Sensor failure is indicated when the CT current drops below –0.15 mA.
06 LOAD SHARE LINE FAIL (monitor)
When TRUE indicates a load share line failure.
07 RESET ALARMS dflt = FALSE (FALSE, TRUE)
This switch resets the alarm status.
E**DISPLAY DIGITAL I/O**
This section has no adjustments to set. It is used only for display of OPEN or CLOSED status of discrete inputs and the ON or OFF status of the discrete outputs.
01 CLOSE RUN/OPEN SHTDWN A (monitor)
The status of discrete input A.
02 DISCRETE INPUT B (monitor)
The status of discrete input B.
03 DISCRETE INPUT C (monitor)
The status of discrete input C.
04 DISCRETE INPUT D (monitor)
The status of discrete input D.
05 RAISE SPEED/LOAD E (monitor)
The status of discrete input E.
06 LOWER SPEED/LOAD F (monitor)
The status of discrete input F.
07 LOAD GENERATOR G (monitor)
The status of discrete input G.
08 SELECT BASE LOAD H (monitor)
The status of discrete input H.
09 DISCRETE OUTPUT #1 (monitor)
The status of discrete output DO-1.
10 DISCRETE OUTPUT #2 (monitor)
The status of discrete output DO-2.
11 DISCRETE OUTPUT #3 (monitor)
The status of discrete output DO-3.
12 DISCRETE OUTPUT #4 (monitor)
The status of discrete output DO-4.
13 INTERNAL CB AUX RELAY (monitor)
The status of discrete output driving the internal load sharing relay.
F**DISPLAY ANALOG I/O**
This section displays the analog inputs to and the outputs from the control.
01 SPEED SENSOR INPUT (RPM) (monitor)
Displays actual engine speed.
02 LOAD SENSOR INPUT (KW) (monitor)
Displays the generator load in kilowatts.
03 ANIN #1, INPUT TYPE (monitor)
Displays one of the following to indicate the input range selected for input 1:
4–20 mA
0–5 V
± 2.5 V
1–5 V
04 ANIN #1 (UNITS) (monitor)
Displays the units of the input type above (volts or mA) of the analog Input #1.
05 ANIN #2, INPUT TYPE (monitor)
Displays one of the following string to indicate the input range selected for input 2:
4–20 mA
0–5 V
±2.5 V
06 ANIN #2 (UNITS) (monitor)
Displays the units of the input type above (volts or mA) of the analog Input #2.
07 LOAD SHARING LINES (Vdc) (monitor)
Indicates the voltage present at terminals 10 and 11.
08 LOAD SHARING BIAS SIG (%) (monitor)
The error signal to the speed reference from the load sharing and/or droop circuitry.
09 ACTUATOR CURRENT (mA) (monitor)
The calculated actuator output current in milliamps. This calculation is based on the percent fuel demand and the actuator type/range selected. External wiring may effect the accuracy of the actual current.
10 ANALOG OUT 1 (%) (monitor)
The output at terminals 16 and 17. 0% is 4 mA, 100% is 20 mA.
11 LOAD SIGNAL (Vdc) (monitor)
The generator kW converted to load gain volts.
G**SPEED SETTINGS**
Speed settings are the parameters that affect the prime mover speed reference.
01 START SPEED (RPM) dflt = 400.00 (1.00, 2100)
The initial speed reference for the speed control before starting. Start speed must be set above cranking speed and below the speed achieved with the start fuel limit setting (light-off speed). A ramp from start speed to idle or rated, whichever is selected, begins when the engine accelerates to start speed. The ramp time is the accel ramp time setting, when going to the rated speed setpoint. The ramp time is the decel ramp time setting, when going to the idle speed setpoint.
02 RAISE SPEED LIMIT (RPM) dflt = 1000.00 (0.00, 4000.00)
The maximum speed reference setting when the raise switch is closed. It is normally set at the speed at which the engine operates at full load if the Droop mode is used, or at the high limit of the speed trim function.
03 LOWER SPEED LIMIT (RPM) dflt = 800.00 (0.00, 4000.00)
The minimum speed reference setting when the lower switch is closed. It is normally set at the minimum operating speed of the engine, or at the minimum limit of the speed trim function.
04 IDLE SPEED (RPM) dflt = 600.00 (0.00, 4000.00)
This is the speed that the speed reference ramp goes to when the close for rated discrete input is OPEN. It is normally the speed at which the engine is operated at start-up. It is also used during cool down.
05 ACCEL RAMP TIME (SEC) dflt = 20.00 (1.00, 300.00)
The time required for the control to ramp the engine speed from idle speed to rated speed. The ramp is started whenever the Idle/Rated contact is closed.
06 DECEL RAMP TIME (SEC) dflt = 20.00 (1.00, 300.00)
The time required for the control to ramp the engine speed from rated speed to idle speed. The ramp is started whenever the Idle/Rated contact is opened.
07 SPEED TRIM INC TIME (SEC) dflt = 30.00 (1.00, 300.00)
This is the time for the speed reference to ramp from the lower speed limit to the raise speed limit when using the Raise Speed switch input.
08 SPEED TRIM DEC TIME (SEC) dflt = 30.00 (1.00, 300.00)
This is the time for the speed reference to ramp from the raise speed limit to the lower speed limit when using the Lower Speed switch input.
09 IDLE DROOP BREAKPOINT dflt = 40.00 (0.50, 100.00)
Normally set above the control output obtained when the engine is unloaded and at low idle. When the output of the control drops below this setting or goes to minimum fuel during rapid engine deceleration, Idle droop (described below) raises the speed reference. This brings the engine back under control sooner and reduces speed undershoot. Typically, Idle Droop is used for marine applications, or mechanical load applications. Speed undershoot may occur because the time required for the control to return to the new fuel setting is dependent on control dynamics and linkage adjustment.
10 IDLE DROOP (%) dflt = 5.00 (0.00, 100.00)
The percentage is based on the difference between the Idle Speed setpoint and the Rated Speed setpoint, when it drops below the idle droop breakpoint. To enable idle droop, the parameter 6 Enable Idle Droop at Configure Menu
A**Speed Control Functions** should be set TRUE.
11 DELAY TIME IDLE TO RATED dflt = 5.00 (0.00, 600.00)
The delay time for the automatic idle to rated switch. The engine will run for this time at idle speed before it ramps to rated speed. In configure menu A**Speed Control Functions** parameter 17 Enable Auto Idle/Rated must be set TRUE.
H**Dynamics #1**
Dynamic adjustments are settings that affect the stability and transient performance of the engine. Two sets of dynamics are provided. To disable the second set of dynamics go to I**DYNAMICS 2** and set the first prompt (Enable Dynamics 2 w/CB) to FALSE. The dynamics being used for control are selected by the CB Aux contact input. The control uses the 1st dynamics when the CB Aux contact input is open, and it uses the 2nd dynamics when the contact is closed.
01 IDLE PROP GAIN 1 dflt = 1.00 (0.001, 10.00)
Determines how fast the control responds to an error in engine speed from the speed-reference setting. The gain is set to provide stable control of the engine at idle speed. As idle speed is increased from idle speed to rated speed, this value will change linearly from this value to the Rated Prop Gain value.
02 RATED PROP GAIN 1 dflt = 2.00 (0.001, 100.00)
Determines how fast the control responds to an error in engine speed from the speed-reference setting. The gain is set to provide stable control of the engine at rated speed and light or unloaded conditions. The gain value is linear between the Idle Prop Gain tunable and the Rated Prop Gain tunable.
03 RESET 1 dflt = 1.00 (0.01, 100.00)
Compensates for the lag time of the engine. It adjusts the time required for the control to return the speed to zero error after a disturbance. Reset is adjusted to prevent slow hunting and to minimize speed overshoot after a load disturbance.
04 ACTUATOR COMPENSATION 1 dflt = 0.10 (0.01, 100.00)
Compensates for the actuator and fuel system time constant. Increasing Compensation increases actuator activity and transient performance.
05 WINDOW WIDTH 1 (RPM) dflt = 60.00 (1.00, 200.00)
This is the magnitude (in rpm) of speed error at which the control automatically switches to fast response. The control uses the absolute value of speed error to make this switch. The absolute value is the difference between the speed reference and the speed. A window width that is too narrow results in cycling that always factors in the gain ratio (see Figure 4-2).
06 GAIN RATIO 1 dflt = 1.00 (1.00, 10.00)
The ratio of the gain setting at steady state to the gain setting during transient conditions. The gain ratio operates in conjunction with the window width and gain adjustments by multiplying the gain set point by the gain ratio when the speed error is greater than the window width. This makes the control dynamics fast enough to minimize engine-speed overshoot on start-up and to reduce the magnitude of speed error when loads are changing. This allows a lower gain at steady state for better stability and reduced steady-state actuator linkage movement (see Figure below).
 |
| Control Gain as a Function of Speed Error |
07 GAIN SLOPE dflt = 0.00 (-50.00, 50.00)
Sets the percent output above which the Gain Slope becomes effective. It should usually be set just above the minimum load output.
08 GAIN BREAKPOINT dflt = 20.0 (0.00, 100.00)
Changes Gain as a function of actuator output. Since actuator output is proportional to engine load, this makes Gain a function of engine load. Gain Slope operates in conjunction with the Gain Slope Breakpoint adjustment to increase (or decrease) Gain when percent Actuator Output is greater than the breakpoint. This compensates for systems having high (or low) gain at low load levels. This allows the Gain setting to be lower at light or no load for engine stability, yet provide good control performance under loaded conditions.
 |
| Control Gain as a Function of Fuel Demand (Load) |
Adjusts the cutoff frequency of a low-pass filter used on the engine speed sensing input (see Figure below). To use this feature set the cutoff frequency below 15.9 Hz. The filter is used to attenuate engine firing frequencies. To calculate the desired filter cutoff point, use the following formulas:
As the filter frequency is reduced, steady state stability improves but transient performance may worsen. As the filter frequency is increased, steady state stability worsens but transient performance may improve.
 |
| Speed Filter |
Allows you to test your dynamics settings by temporarily applying a decreased fuel demand transient to stimulate a control response. Both the magnitude (Act Bump Level) and duration (Act Bump Duration) of the transient may be set. The actuator bump must be enabled in the ACTUATOR BUMP menu. To initiate an actuator bump, toggle Bump Act to TRUE then back to FALSE while the engine
is operating in a normal steady state loaded or unloaded condition. Figure below illustrates prime mover starts with the RAMP TIME set to minimum (no ramp), step loadings at four different RESET settings, and stable, steady-state running conditions. These are typical performance curves on a naturally aspirated (non-turbocharged) diesel engine.
IMPORTANT: BUMP ENABLE must be set TRUE to enable the BUMP ACT function.
See the ACTUATOR BUMP SETUP menu.
 |
| Typical Transient Response Curves |
I**Dynamics #2**
The Dynamics 2 control parameters are adjusted the same as Dynamics 1 described above. To enable the use of two sets of dynamics, it is necessary to set Enable 2nd DYNAMICS w/CB below to TRUE. These parameters are in control only when the CB Aux contact input is closed or if a discrete input is configured for Select 2nd Dynamics and this input is closed.
IMPORTANT: I**Dynamics #2** parameters 04 thru 10 have the same effect on speed control response as H**Dynamics #1** parameters 01 thru 07 described above.
01 ENABLE DYNAMICS 2 W/CB dflt = FALSE (FALSE, TRUE)
02 DELAY DYN 2 ENABLE (SEC) dflt = 0.00 (0.00, 20.00)
This is the delay time before dynamics #2 are used by the speed control when the "CB Aux Droop contact" or "Select 2nd Dynamics" input is activated.
03 DELAY DYN 1 ENABLE (SEC) dflt = 0.00 (0.00, 20.00)
This is the delay time before Dynamics #1 are used by the speed control after the "CB Aux Droop contact" or "Select 2nd Dynamics" input is de-activated.
04 PROP GAIN 2 dflt = 2.00 (0.001, 100.00)
05 RESET 2 dflt = 1.00 (0.01, 100.00)
06 ACTUATOR COMPENSATION 2 dflt = 0.10 (0.01, 100.00)
07 WINDOW WIDTH 2 (RPM) dflt = 60.00 (1.00, 200.00)
08 GAIN RATIO 2 dflt = 1.00 (1.00, 10.00)
09 GAIN SLOPE 2 dflt = 0.00 (-50.00, 50.00)
10 GAIN BREAKPOINT 2 dflt = 20.0 (0.00, 100.00)
11 SPEED FILTER FREQ 2 (HZ) dflt = 12.00 (4.00, 20.00)
12 BUMP ACT TRIG (T THEN F) dflt = FALSE (FALSE, TRUE)
Read More:
Installation (Chapter 2) Part 2 - WOODWARD 2301D Load Sharing and Speed Control
Installation (Chapter 2) Part 1 - 2301D WOODWARD Load Sharing and Speed Control
Plant Wiring Diagram - 2301D Load Sharing and Speed Control
General Information (Chapter 1) - WOODWARD 2301D Load Sharing and Speed Control
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