14.20
SEL-400 Series Relays Instruction Manual Date Code 20171006
ASCII Command Reference
Command Description
CSU
Use the CSU command to gather event report summaries.
When parameter n is 1–9999, n indicates the order of the event report. The most
recent event report is 1, the next most recent report is 2, and so on. When param-
eter n is 10000–42767, n indicates the absolute serial number of the event report.
CSU ACK
Use the CSU ACK command to acknowledge an event summary that you recently
retrieved with the CSU NEXT command on the present communications port.
CSU MB
The CSU MB command causes the relay to output the labels for the MIRRORED
B
ITS communications channel data in Compressed ASCII format.
CSU NEXT
Use the CSU NEXT command to view the oldest unacknowledged event sum-
mary in Compressed ASCII format.
Table 14.45 CSU Command
Command Description Access Level
CSU Return the most recent event summary (with label lines) in
Compressed ASCII format.
1, B, P, A, O, 2
CSU n
a
a
Parameter
n
indicates event order or serial number.
Return a particular n event summary (with label lines) in
Compressed ASCII format.
1, B, P, A, O, 2
Ta b l e 1 4.4 6 C EV ACK Com m a n d
Command Description Access Level
CSU ACK Acknowledge the oldest unacknowledged event summary at
the present communications port for Compressed ASCII format.
1, B, P, A, O, 2
Table 14.47 CSU MB Command
Command Description Access Level
CSU MB Return the MIRRORED BITS communications channel labels. 1, B, P, A, O, 2
Ta b l e 1 4.4 8 C S U N Comm a n d
Command Description Access Level
CSU N View the oldest unacknowledged event summary. 1, B, P, A, O, 2
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