Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 229)

Rockwell Automation Publication 1407-UM001G-EN-P - April 2013 229
Detailed CGCM Unit Tag Descriptions Appendix E
• Exc_V- This tag reports the Excitation Voltage.
• Exc_I – This tag reports the Excitation Current.
• ExcRipple – This tag reports the Ripple Current component of the
Excitation Current.
• kW_Hrs – This tag reports the cumulative kWHours produced by the
Generator.
• kVAR_Hrs – This tag reports the cumulative kVARHours produced by
the Generator.
• kVA_Hrs – This tag reports the cumulative kVAHours produced by the
Generator.
• GenFreq – This tag reports the Generator frequency.
• BusFreq – This tag reports the Bus frequency.
• V_AdjustOffset – This tag reports the voltage on the VREF terminals of
the CGCM unit.
• BusV_Present - This tag indicates if there is voltage present on the
reference bus.
• GenV_Present - This tag indicates if generator voltage is being developed.
• FreqLessThan10Hz - This tag indicates that the generator frequency is
less than 10 Hz.
Redundancy This section describes the redundancy inputs and outputs for the CGCM unit.
Redundancy Inputs to the CGCM Unit
• RedndtTrackRate - This tag configures the rate at which the Tracking
mode of the redundant CGCM units matches the primary CGCM unit’s
active excitation control mode
• RedndtTrackDly - This tag changes the initial delay of the tracking
function of the redundant CGCM unit to prevent the Tracking mode
from adjusting the non-active modes into an undesirable condition. For
example, while the unit is operating in AVR mode, the sensing VT fails to
open. If the redundant CGCM unit Tracking mode were allowed to
instantly track the full-on condition created by the loss of sensing, the
transfer to the redundant CGCM unit in an undesirably high generator
voltage. Adding a tracking delay enables the unit to transfer to a redundant
CGCM unit without letting the redundant CGCM unit follow into a
potentially undesirable operating point.