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AVR Mode
• HardwareExcEned – This tag reports the state of the Excitation Input
[EX-D(+), EX-D(-) terminals on Terminal Block TB7]. Field excitation is
disabled when this bit is in a 0 state.
• SoftwareExcEned – This tag reports the state of the SoftwareExcEn tag.
• ExcOut – This tag reports the state that the CGCM-DLR unit is
commanding the excitation output to take.
• SetptTraverseActive - This tag indicates when the CGCM-DLR unit is
traversing between an internal tracking setpoint establish by the internal
tracking function and the final setpoint that is provided by the schedule
write data. Traversing occurs when switching from the active Regulation
mode and any of the other regulating modes.
This section describes the AVR mode inputs and outputs for the CGCM-DLR
unit.
AVR Mode Inputs to CGCM-DLR Unit
The AVR mode contains these inputs:
• AVR_FCR_Select – This tag lets you select AVR or FCR control.
• AVRSetpt – This tag sets the desired voltage setpoint for operation in the
AVR control mode.
• AVR_FCR_Kp - This tag sets the Proportional Gain parameter for AVR
and FCR control modes.
• AVR_FCR_Ki – This tag sets the Integral Gain parameter for AVR and
FCR control modes.
• AVR_FCR_Kd - This tag sets the Derivative Gain parameter for AVR and
FCR control modes.
• AVR_FCR_Td – This tag sets the filtering Time Constant for AVR and
FCR control modes.
• AVR_Kg - This tag lets you adjust coarse loop gain and overall gain of the
AVR operating mode. It also determines the characteristic of the dynamic
response to a change in the voltage of the generator.
• AVR_Traverse_Rate - This parameter determines the time that is
measured in seconds for the setpoint to move from zero to the rated
generator voltage. If determines how fast the regulator changes the voltage
setpoint from the tracking value to the operating setpoint when the
Regulator Operating mode changes to AVR.
• AVR_FCRAuxGain - This tag lets you adjust the overall gain of the
auxiliary input control on the AVR/FCR operating mode. The units for
this tag are percent of nominal per volt. A setting of 1 results in the
controlled parameter changing by one percent of the nominal value for
each volt applied to the auxiliary input.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
Detailed CGCM-DLR Unit Tag Descriptions
Appendix E
223
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