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Appendix E
Detailed CGCM-DLR Unit Tag Descriptions
228
Over-excitation Limit Inputs to CGCM-DLR Unit
• OEL_En – The setting of this tag enables the Over-excitation Limiting
function.
• OEL_Kg - This tag lets you adjust the proportional gain of the
Over-excitation limiter. It also determines the response of the limiter to an
Over-excitation event.
• OEL_Ki - This tag lets you adjust coarse loop gain and overall gain of the
Over-excitation limiter. This tag determines the characteristic of the
dynamic response to an Over-excitation event.
• OEL_OnLineHiSetpt – This tag sets the high current level for the online
over-excitation limiting function. The CGCM-DLR unit over-excitation
limiter limits excitation current at this level. Operation at this level is
allowed for a time no longer than programmed in the
OEL_OnLineHiTimeDly tag.
• OEL_OnLineHiTimeDly – This tag sets the amount of time the online
over-excitation limiting function lets the unit operate at the excitation
current level that is programmed in the OEL_OnLineHiSetpt tag.
• OEL_OnLineMedSetpt - This tag sets the medium current level for the
online over-excitation limiting function. Operation at this level is allowed
for a time no longer than programmed in the OEL_OnLineMedTimeDly
tag.
• OEL_OnLineMedTimeDly – This tag sets the amount of time the online
over-excitation limiting function lets the unit operate at the excitation
current level that is programmed in the OEL_OnLineMedSetpt tag.
• OEL_OnLineLoSetpt - This tag sets the low current level for the online
over-excitation limiting function. Operation at this level is allowed
continuously.
• OEL_Off LineHiSetpt – This tag sets the high current level for the
offline over-excitation limiting function. The CGCM-DLR unit
over-excitation limiter limits excitation current at this level. Operation at
this level is allowed for a time no longer than programmed in the
OEL_OffLineHiTimeDly tag.
• OEL_Off LineHiTimeDly - This tag sets the amount of time the offline
over-excitation limiting function lets the unit operate at the excitation
current level that is programmed in the OEL_OffLineHiSetpt tag.
• OEL_Off LineLoSetpt - This tag sets the low current level for the offline
over-excitation limiting function. Operation at this level is allowed
continuously.
Over-excitation Limit Outputs from CGCM Unit
• OEL_Active – This tag is set to 1 when the exciter is operating in the
Over-excitation Limiting mode.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
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