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Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
Appendix E
Detailed CGCM-DLR Unit Tag Descriptions
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.
Synchronizing
This section describes the synchronizing inputs and outputs for the
CGCM-DLR unit.