7.20
SEL-700G Relay
Instruction Manual
Date Code 20170814
Communications
SEL ASCII Protocol and Commands
The
=>
prompt indicates that the relay is now in Access Level 1.
The two previous examples demonstrate going from Access Level 0 to
Access Level 1. The procedure to go from Access Level 1 to Access Level 2
with the 2AC command entered at the access level screen prompt is similar.
The relay pulses the SALARM Relay Word bit for one second after a
successful Level 2 or Level C access, or if access is denied.
ANALOG Command
Use the ANA command to test an analog output by temporarily assigning a
value to an analog output channel (see Table 7.8 for the command description
and Table 7.9 for the format). After entering the ANA command, the device
suspends normal operation of the analog output channel and scales the output
to a percentage of full scale. After assigning the specified value for the
specified time, the device returns to normal operation. Entering any character
(including pressing the space key) ends the command before it reaches the
specified interval completion. You can test the analog output in one of the
following two modes:
➤
Fixed percentage: Outputs a fixed percentage of the signal for a
specified duration
➤
Ramp: Ramps the output from minimum to maximum of full
scale over the time specified
NOTE:
0% = low span, 100% = high
span. For a scaled output from 4–
20 mA, 0 percent is 4 mA and
100 percent is 20 mA.
When parameter p is a percentage, the relay displays the following message
during the test:
Outputting xx.xx [units] to Analog Output Port for y.y
minutes. Press any key to end test
[RID Setting]
Date: mm/dd/yyyy
Time: hh:mm:ss.sss
[TID Setting]
Time Source: external
Level 1
=>
Table 7.8
ANALOG Command
Command
Description
Access Level
ANA c p t
Temporarily assigns a value to an analog output
channel.
2
Table 7.9
ANALOG Command Format
Parameter
Description
c
Parameter c is the analog channel (either the channel name, for
example, A0301, or the channel number, for example, 301).
p
Parameter p is a percentage of full scale, or either the letter “R” or
“r” to indicate ramp mode.
t
Parameter t is the duration (in decimal minutes) of the test.
where:
xx.xx
is the calculation of percent of full scale
[units]
is either mA or V, depending on the channel type setting
y.y
is the time in minutes
Содержание SEL-700G Series
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