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
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