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Loss of Excitation Outputs from CGCM Unit
• LossExcFlt - This tag is used to communicate the occurrence of a Loss of
Excitation Fault to the host Logix controller. When this tag is a 1, it
indicates that a fault has occurred. The tag is latched until the host Logix
controller resets it by setting the FltReset tag.
Shorted Excitation Output from CGCM-DLR Unit
• Spare2 - Indicates when the excitation output short-circuit protection is
active. When this tag is a 1, it indicates that a shorted output exists and the
excitation current output has been clamped to a very low level. The tag is
reset by either setting the tag SoftwareExcEN = 0 or by cycling the control
power to the CGCM-DLR unit.
Over-excitation Voltage Inputs to CGCM-DLR Unit
• OvrExcFltOutEn - When this tag is a 1 in the configuration, and an
Over-excitation Fault occurs (as defined by the OvrExcV_Setpt tag), the
Fault Relay is energized. When this tag is a 0 in the configuration, an
Over-excitation Condition has no effect on the Fault Relay.
• OvrExcV_Setpt - This tag configures the over-excitation voltage setpoint
that the CGCM-DLR unit uses to recognize when an over-excitation
condition is present. When the condition occurs, the CGCM-DLR unit
starts timing toward a trip that is based on the Over-excitation Time Delay.
• OvrExcV_TimeDly - This tag configures the time to trip the unit once the
over-excitation voltage setpoint has been exceeded.
Over-excitation Voltage Outputs from CGCM Unit
• OvrExcFlt - This tag is used to communicate the occurrence of an
Over-excitation Fault to the host Logix controller. When this tag is a 1, it
indicates that a fault has occurred. The tag is latched until the host Logix
controller resets it by setting the FltReset tag.
Generator Overvoltage Inputs to CGCM-DLR Unit
• Ovr_V_FltOutEn – When this tag is a 1 in the configuration, and an
overvoltage Fault occurs (as defined by the Ovr_V_Setpt tag), the Fault
Relay is energized. When this tag is a 0 in the configuration, an overvoltage
Condition has no effect on the Fault Relay.
• Ovr_V_Setpt – This tag configures the generator overvoltage setpoint
that the CGCM-DLR unit recognizes an overvoltage condition is present
and starts timing to trip based on the overvoltage Time Delay.
• Ovr_V_TimeDly - This tag configures the time to shut down the unit
once the generator overvoltage setpoint has been exceeded.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
Detailed CGCM-DLR Unit Tag Descriptions
Appendix E
231
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