7.14
SEL-749M Relay Instruction Manual Date Code 20080918
Communications
SEL ASCII Protocol Details
CONTROL Command (Control Remote Bit)
The CON command is a two-step command for controlling remote bits, which
are Relay Word bits RB1–RB8.
Use the CON command to exercise remote bits.
>>CON 5 <Enter>
CONTROL RB5: PRB 5 <Enter>
=>>
You must enter the same remote bit number in both command steps. If the bit
numbers do not match, the recloser control responds with the following:
Invalid Command
See Logic Functions on page 4.45 for more information.
CSTATUS Command (Compressed Status)
The CST command generates a relay status report in Compressed ASCII
format.
CSUMMARY Command
The CSU command retrieves the event summary information from the last
event report in Compressed ASCII format. See Section 9: Analyzing Events.
Table 7.15 CONTROL Command
Command Description Access Level
CON n
a
a
Parameter n is a number from 1 to 8 representing RB1–RB8.
First step of a two-command sequence.
The SEL-749M will prompt for the second step
(subcommand), shown below.
2
Table 7.16 CONTROL Subcommands
Subcommand Description
SRB n Set Remote Bit n (ON position)
CRB n Clear Remote Bit n (OFF position)
PRB n Pulse Remote Bit n for 1/4 cycle (MOMENTARY position)
Table 7.17 CSTATUS Command (Compressed Status)
Command Description Access Level
CST Return the relay status in Compressed ASCII. 1
Ta b l e 7.18 CS U M M A RY Co m man d
Command Description Access Level
CSU Return the most recent event summary (with label
lines) in Compressed ASCII format.
1
Courtesy of NationalSwitchgear.com
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