SEL-701-1 Monitor
Date Code 20011009
Maintenance & Troubleshooting
Troubleshooting Procedure
9.6
Monitor Does Not Respond
to Commands From Device Connected to Serial Port
Monitor Does Not Respond to Faults
Table 9.6
Monitor Does Not Respond
to Commands From Device Connected to Serial Port
Possible Cause
Solution
Communications device not connected
to monitor.
Verify cable connections.
Monitor or communications device at
incorrect baud rate or other
communication parameter
incompatibility, including cabling error.
Verify terminal setup and cable pinout.
Monitor serial port has received an
XOFF, halting communications.
Type
<CTRL>Q
to send monitor on
XON and restart communications.
Rear-panel serial port protocol set
differently than expected.
If you select Modbus
®
protocol, the
rear-panel EIA-232 serial port is
disabled. Use the EIA-485 port to
communicate with the monitor using
Modbus, or use the front-panel EIA-232
port to communicate with the monitor
using ASCII text. See
for more
information on serial port configuration.
Table 9.7
Monitor Does Not Respond to Faults
Possible Cause
Solution
Monitor improperly set.
Verify monitor settings.
Improper test source settings.
Verify test source settings.
CT or PT input wiring error.
Verify input wiring.
Failed monitor self-test.
Use the front-panel Status of Monitor
function to view self-test results.
Содержание SEL-701-1
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