7.21
Date Code 20170814
Instruction Manual
SEL-700G Relay
Communications
SEL ASCII Protocol and Commands
When parameter p is a ramp function, the device displays the following
message during the test:
Ramping Analog Output at xx.xx [units]/min; full scale in
y.y minutes. Press any key to end test
For either mode of operation (percentage or ramp), when the time expires, or
upon pressing a key, the analog output port returns to normal operation and the
device displays the following message:
Analog Output Port Test Complete
Example 1
The following is an example of the device response to the ANA command in
the percentage mode. For this example, we assume that the analog output
signal type is 4–20 mA, and we want to test the analog output at 75 percent of
rating for 5.5 minutes. To check the device output, calculate the expected mA
output as follows:
To start the test, enter ANA A0301 75 5.5 at the Access Level 2 prompt:
Example 2
The following is an example of the ramp mode when the analog output signal
type is 4–20 mA for a 9.0 minute test.
To check the device output, calculate the current/time (mA/min) output as
follows:
To start the test, enter ANA AO301 R 9.0 at the Access Level 2 prompt:
AST Command (Start Autosynchronizer)
The AST command (Access Level 2) is available in SEL-700G models with
autosynchronizer function. It allows the ASCII serial port to control the AST
Relay Word bit, which when asserted starts and runs the autosynchronizer,
provided that all the necessary conditions are met. The relay responds
automatically with a message if conditions are not met, giving a specific
explanation. See Autosynchronism on page 4.173 for further details.
where:
xx.xx
is the calculation based upon range/time t
[units]
is either mA or V, depending on the channel type setting
y.y
is the time in minutes
=>>
ANA A0301 75 5.5 <Enter>
Outputting 16.00 mA to Analog Output Port for 5.5 minutes.
Press any key to end test
Output
20.00 mA
4.00 mA
–
75
100
---------
4.00 mA
+
16.00 mA
=
=
=>>
ANA AO301 R 9.0 <Enter>
Ramping Analog Output at 1.78 mA/min; full scale in 9.0 minutes.
Press any key to end test
Output
20.00 mA
4.00 mA
–
9.0 min
---------------------------------------------------
1.78 mA/min
=
=
Summary of Contents for SEL-700G Series
Page 14: ...This page intentionally left blank ...
Page 22: ...This page intentionally left blank ...
Page 32: ...This page intentionally left blank ...
Page 52: ...This page intentionally left blank ...
Page 106: ...This page intentionally left blank ...
Page 510: ...This page intentionally left blank ...
Page 560: ...This page intentionally left blank ...
Page 578: ...This page intentionally left blank ...
Page 588: ...This page intentionally left blank ...
Page 604: ...This page intentionally left blank ...
Page 634: ...This page intentionally left blank ...
Page 738: ...This page intentionally left blank ...
Page 802: ...This page intentionally left blank ...