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CET Inc.
For High and High-High Alarms, which are conceptually similar to Over Setpoint:
Return Limit = Alarm Limit x (1 – Universal Hysteresis)
Residual Current H Alarm:
Figure 4-13 Current H Alarm Logic Diagram
Residual Current HH Alarm:
Figure 4-14 Current HH Alarm Logic Diagram
4.3.6 SM Current Alarm
PMC-512-D also provides four Current alarm levels (High-High, High, Low, Low-Low) for each SM Current.
The SM Current Alarms will only be evaluated if it’s determined that the respective
SM Current ON
status
is true. The
SM Current
Alarm Enable
register provides the ability to individually enable the Current
Alarm for each SM. The
Alarm Threshold
and
Time Delay
settings would apply to all SMs that are enabled
for
SM Current Alarm
.
The following table illustrates the
SM Current Alarm
setup parameters.
Parameters
Description
Range/Default
Current Alarm Enable
Enable SM1-12 to for Current Alarm
0*-0x0FFF
1
Current HH Alarm Threshold (%)
SM Current HH Alarm Threshold
0
2
to 100%, 80%*
Current HH Alarm Time Delay
SM Current HH Alarm Time Delay
0 to 9999 (s), 10s*
Current H Alarm Threshold (%)
SM Current H Alarm Threshold
0
2
to 100%, 60%*
Current H Alarm Time Delay
SM Current H Alarm Time Delay
0 to 9999(s), 10s*
Current L Alarm Threshold (%)
SM Current L Alarm Limit
0*
2
to 100%
Current L Alarm Time Delay
SM Current L Alarm Time Delay
0* to 9999(s)
Current LL Alarm Threshold (%)
SM Current LL Alarm Threshold
0*
2
to 100%
Current LL Alarm Time Delay
SM Current LL Alarm Time Delay
0* to 9999(s)
Current Alarm Trigger
SM Current Alarm Trigger
0*
3
=Disabled, Bit 0=DO
Bit 1=Alarm LED
Bits 2-15=Reserved
Table 4-10 Current Alarm Parameters