CAUTION
All inputs or outputs used for manual control must be configured on the GAM3.2. The controller must not have any other
governor inputs or outputs.
Function
I/O
Type
Details
Regulators > GOV >
Modes > Stand-alone
mode
Digital input Continuous
The operator activates this input to activate stand-alone mode.
If you want one digital input to activate both GOV and AVR stand-alone
mode, also configure
Regulators > AVR > Modes > Stand-alone mode
on
the same input.
Regulators > GOV >
Manual > Manual GOV
increase
Digital input Continuous
When this input is activated during stand-alone mode, the GAM3.2
increases the output to the governor. That is, the
Regulator > GOV >
Control > GOV output [%]
analogue output, or the
Regulators > GOV >
Control > GOV increase
digital output.
Regulators > GOV >
Manual > Manual GOV
decrease
Digital input Continuous
When this input is activated during stand-alone mode, the GAM3.2
decreases the output to the governor. That is, the
Regulator > GOV >
Control > GOV output [%]
analogue output, or the
Regulators > GOV >
Control > GOV decrease
digital output.
Governor output
-
-
Configure either an analogue governor output (GOV output [%]), or two
relay governor outputs (GOV increase and GOV decrease), on the
GAM3.2.
Regulators > GOV > State
> Stand-alone is active
Digital
output
Continuous
Optional. The relay activates when stand-alone mode is the active
regulation mode.
More information
See
Regulation, Governor
for general information on regulation.
INFO
The digital inputs
Manual GOV increase
and
Manual GOV decrease
are also used for manual regulation.
More information
See
Breakers, synchronisation and de-loading, Synchronisation in each control mode, Synchronisation under
switchboard control
for more information on manual regulation.
More information
See
Regulation, Configuration alarms
for information about the incorrect configuration alarm.
How it works during normal controller operation
When the
Stand-alone mode
digital input is activated during normal operation, the controller status changes to
Manual regulation
.
For relay regulation, the GAM3.2 activates the relay outputs in response to the manual inputs.
For analogue regulation, the GAM3.2 initially keeps the analogue output at its last value. The GAM3.2 then adjusts the analogue
output in response to the manual inputs.
How it works if the rest of the controller is disabled
The rest of the controller can be disabled in the following situations:
•
PSM3.1 loses power.
•
The controller is in service mode, downloading software, and/or internal communication is not working.
The GAM3.2 regards the rest of controller disabled when it cannot communicate with the rest of the controller. As long as the
GAM3.2 has power and the required wiring, you can use it for stand-alone manual regulation.
DESIGNER'S HANDBOOK 4189340911K UK
Page 179 of 521
