10.36
SEL-311C Relay Instruction Manual Date Code 20060320
Serial Port Communications and Commands
Command Explanations
OPE Command (Open Breaker)
The OPE command asserts Relay Word bit OC for 1/4 cycle when it is
executed. Relay Word bit OC can then be programmed into the SEL
OGIC
control equation TR to assert the TRIP Relay Word bit, which in turn asserts
an output contact (e.g., OUT101 = TRIP) to trip a circuit breaker. See
Figure 5.1.
See the discussion following Figure 5.2 for more information concerning
Relay Word bit OC and its recommended use, as used in the factory settings.
To issue the OPE command, enter the following:
==>OPE <Enter>
Open Breaker (Y/N) ? Y <Enter>
Are you sure (Y/N) ? Y <Enter>
==>
Typing N <Enter> after either of the above prompts will abort the command.
The OPE command is supervised by the main board Breaker jumper (see
Table 2.4). If the Breaker jumper is not in place (Breaker jumper = OFF), the
relay does not execute the OPE command and responds:
Aborted: No Breaker Jumper
PUL Command (Pulse Output Contact)
The PUL command allows you to pulse any of the output contacts for a
specified length of time. The command format is:
PUL x y
To pulse OUT101 for 5 seconds:
==>PUL OUT101 5 <Enter>
Are you sure (Y/N) ? Y <Enter>
==>
If the response to the Are you sure (Y/N) ? prompt is N or n, the command
is aborted.
The PUL command is supervised by the main board Breaker jumper (see
Table 2.4). If the Breaker jumper is not in place (Breaker jumper = OFF), the
relay does not execute the PUL command and responds:
Aborted: No Breaker Jumper
The relay generates an event report if any of the OUT101 through OUT107
contacts are pulsed. The PUL command is primarily used for testing purposes.
where:
x = the output name (e.g. OUT101, OUT107, ALARM, OUT211—see
Figure 7.27 and Figure 7.28).
y = the pulse duration (1–30 seconds). If y is not specified, the
pulse duration defaults to 1 second.
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