Loss of excitation outputs from the cgcm unit, Shorted excitation output from the cgcm unit, Over-excitation voltage inputs to the cgcm unit – Rockwell Automation 1407-CGCM Combination Generator Control Module User Manual
Page 217: Over-excitation voltage outputs from the cgcm unit, Generator over-voltage inputs to the cgcm unit
Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
217
Detailed CGCM Unit Tag Descriptions Appendix E
Loss of Excitation Outputs from the 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 the CGCM 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 unit.
Over-excitation Voltage Inputs to the CGCM 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 unit uses to recognize when an over-excitation condition
is present. When the condition occurs, the CGCM unit starts timing
toward a trip 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 the 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 Over-voltage Inputs to the CGCM Unit
• Ovr_V_FltOutEn – When this tag is a 1 in the configuration, and an
Over-voltage 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
Over-voltage Condition has no effect on the Fault Relay.
• Ovr_V_Setpt – This tag configures the generator over-voltage setpoint
that the CGCM unit recognizes an over-voltage condition is present and
starts timing to trip based on the Over-voltage Time Delay.
• Ovr_V_TimeDly - This tag configures the time to shutdown the unit
once the generator Over-voltage Setpoint has been exceeded.