Manual

84 Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
Chapter 4 CGCM Unit Configuration
• Over-excitation Limiting Enable – Select this check box to enable
over-excitation limiting. Tag OEL_En in the configuration table stores
this parameter. In addition to selecting the check box, which sets the
OEL_En tag in the configuration table, the OEL_En tag in the Output
(Scheduled Write) Data table must also be set to enable this function. In
Series B deices with firmware revision 3.3 or earlier, the OEL limiter
operates if either box is checked or the OEL_En tag in the Output
(Scheduled Write) Data table is set.
• The tags listed below determine the points shown in the OEL
configuration diagrams below. These tags are in the configuration table
and are set by the like-named fields in the OEL tab. They are expressed as
amperes and seconds, respectively.
Figure 37 - Online OEL Configuration
– Point A is defined by tags OEL_OnlineHiSetpt and
OEL_OnlineHiTimeDly
– Point B is defined by OEL_OnlineMedSetpt and
OEL_OnlineMedTimeDly
– Point C is defined by OEL_OnlineLoSetpt
Figure 38 - Offline OEL Configuration
– Point D is defined by OEL_OfflineHiSetpt and
OEL_OfflineHiTimeDly
– Point E is defined by OEL_OfflineLoSetpt
• Online/Offline graph button - Toggles to show online or offline OEL
characteristics. The graph pictorially represents the OEL settings.
FIELD CURRENT
TIME IN SECONDS
High
Current
Time
0…10 seconds
CONTINUOUS
Medium
Current
Time
0…120 seconds
Low
Current
Level
0.0…15 A dc
Medium
Current
Level
0.0… 20 A dc
High
Current
Level
0.0…30 A dc
A
B
C
FIELD CURRENT
TIME IN SECONDS
High
Current
Time
CONTINUOUS
0…10 seconds
Low
Current
Level
0…15 A dc
High
Current
Level
0…30 A dc
D
E