Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 222)

222 Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
Appendix E Detailed CGCM Unit Tag Descriptions
Phase Rotation Check Outputs from the CGCM 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 the CGCM 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 unit
uses to recognize when a generator over-current condition exists When the
condition occurs, the CGCM unit starts timing toward a trip 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 applied to the CGCM unit.
• Ovr_I_Curve - This tag configures the time over-current characteristic
curve that is used by the over-current function of the CGCM unit.
• Ovr_I_VrestSetpt - This tag lets the timed over-current characteristic to
be modified based on the amount of generator voltage applied to the
CGCM unit. If the generator voltage drops, indicating 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 the 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 unit.
Synchronizing Inputs to the CGCM Unit
• AutoSyncEn – This tag is used to configure the CGCM unit to perform
Auto-Synchronization. This is one of three synchronization modes, each
selected by their respective tag. Only one can be active (1) or the
SyncModeConflict tag is activated and the synchronization fails
(indicated by SyncFailure tag).