Manual 37443A DSLC-2 - Digital Synchronizer and Load Control
© Woodward Page 123/226
DSLC-2 Control Adjustments
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When the prestart setup procedures described above have been completed, the generator set may be activated. A
resistive load bank is preferred to do some of the following adjustment procedures.
Verification of speed and voltage bias connections:
Speed bias
• In Menu 6.2 verify
o Selected hardware type (parameter 5201)
o Frequency control initial state (parameter 5508)
Voltage bias
• In Menu 6.2 verify
o Selected hardware type (parameter 5215)
o Voltage control initial state (parameter 5608)
The generator set will be started without the speed and voltage bias output connected for verification the speed
control and voltage regulator are adjusted to operate at rated speed and rated voltage. The voltage regulator
should have a droop CT connected with around a 3 % droop setting.
1. The speed and voltage can now be connected
a. In the var/PF control Menu 4
b. VAR PF control mode (parameter 7558) will be set to “Disabled”
2. DSLC-2 discrete inputs
a. Close the “Load / Unload” input, terminal 74
b. Verify the “CB Aux” feedback, terminal 70, is available
3. The Homepage will be used for verification of speed and voltage. Menu 7, 8 and 9 will also be observed
for verification of all electrical parameters, alarms and discrete input and outputs.
4. Depending how Menu 5 was configured, you may have a Missing member alarm (parameter 4617) as
seen on Menu 8. This alarm needs to be cleared for initial testing.
a. Menu 5
b. Number of DSLC communicating (parameter 4063)
c. Set to “1”
d. Number of MSLC communicating (parameter 4707)
e. Set to “0”
f. Alarm clears automatically
5. The DSLC-2 has a frequency trim and voltage trim feature that is active in isochronous and load sharing
modes. The DSLC-2 will be in the droop mode with no “CB Aux” feedback. Once the engine is started,
the DSLC-2 will not be in any PID loop trying to control speed or voltage.
6. Start the generator set
7. Verify speed and voltage on the Homepage
8. Speed Bias
a. Menu 6.2
b. Adjust the Frequency control initial state (parameter 5508)
i. Change from 50 % to 60 %
ii. Speed should increase
iii. If speed decreased, it tells us that the connection going to the speed control is reversed
(backwards)
iv. Change from 60 % back to 50 %
v. Shutdown the generator set and correct the wiring
vi. Start the generator set and repeat the change from 50 % to 60 %
vii. Speed should increase
viii. Change from 60 % to 40 %
ix. Speed should decrease below rated speed
x. Change back to 50 %
xi. Speed bias connection is now correct
xii. If the generator speed is not at rated, adjust the frequency control initial state setting
until at rated speed. This setting will be saved as your new initial state value.
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