Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 62)

62 Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
Chapter 3 CGCM Unit Operation
• Check Synchronization
The host controller sets the CheckSyncEn tag to enable Check
Synchronization mode. This mode is the same as the Automatic
Synchronization mode except the CGCM unit does not set a close breaker
tag. This mode is useful for testing the system.
• Initiate Synchronization
The host Logix controller sets the InitiateSync tag to begin the
synchronization process. This tag must remain set during the entire
process. If the initiate synchronization tag is reset, the CGCM unit
terminates the synchronization process. Similarly, a write of the
Unscheduled Write table terminates an active synchronization process.
The Initiate Synchronization tag enables the operation of the selected
Synchronizing mode. The host controller must select one and only one of
the three modes described above before or at the same time as the Initiate
Synchronization tag. If none are enabled, the CGCM unit sets the
undefined Synchronization mode error flag. If more than one of these
inputs is enabled, the CGCM unit sets the conflict error flag. In either
case, synchronization fails and the CGCM unit sets the synchronization
failure flag.
Synchronizing Error Calculation
When Synchronization is active, the CGCM unit computes synchronizing errors
as follows.
Voltage Match Error 100
Bus Voltage Generator Voltage –
Bus Voltage
--------------------------------------------------------------------------------  =
Frequency Match Error Bus Frequency Generator Frequency – =
Phase Match Error Bus Voltage Phase Angle in Degrees
Generator Voltage Phase Angle in Degrees –
=