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Appendix E
Detailed CGCM-DLR Unit Tag Descriptions
Synchronizing
236
Phase Rotation Check Outputs from CGCM-DLR Unit
• PhRotFlt - This tag is used to communicate the occurrence of a Phase
Rotation 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 Over-current Inputs to CGCM-DLR Unit
• Ovr_I_FltOutEn - When this tag is a 1 in the configuration, and an
Over-current Fault occurs (as defined by the Ovr_I_Setpt tag), the Fault
Relay is energized. When this tag is a 0 in the configuration, an
Over-current Condition has no effect on the Fault Relay.
• Ovr_I_Setpt - This tag configures the threshold that the CGCM-DLR
unit uses to recognize when a generator over-current condition exists.
When the condition occurs, the CGCM-DLR unit starts timing toward a
trip that is based on the selected over-current curve and time dial.
• Ovr_I_TimeDial – This tag configures the tripping time in relationship
to the magnitude of the actual current that is applied to the CGCM-DLR
unit.
• Ovr_I_Curve - This tag configures the time over-current characteristic
curve that is used by the over-current function of the CGCM-DLR unit.
• Ovr_I_VrestSetpt - This tag lets the timed over-current characteristic to
be modified based on the amount of generator voltage that is applied to
the CGCM-DLR unit. If the generator voltage drops, which indicates a
close in fault to the generator, the generator voltage decays and the
available fault current can be less. This parameter shifts the characteristic
curve in such a manner as to compensate for the reduction of available
fault current.
Generator Over-current Outputs to CGCM Unit
• Ovr_I_Flt - This tag is used to communicate the occurrence of an
Over-current 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.
This section describes the synchronizing inputs and outputs for the
CGCM-DLR unit.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
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