Omron SYSDRIVE 3G3MV A2002, User Manual

Page: 265 / 348

8-12
Fault
display
Probable cause and remedy Fault name and Meaning
cal
(flashing)
Communications standby
(CAL)
No normal DSR message has
been received during
RS-422/4895 communications.
The Inverter detects this alarm
only when RUN command
selection (n003) is set to 2 or
frequency reference selection
(n004) is set to 6. Until the
alarm is reset, no input other
than communications input will
be ignored.
·
A short-circuit, ground fault, or discon-
nection has occurred on the communica-
tions line.
®
Check and correct the line.
·
The termination resistance setting is
incorrect.
®
In the case of RS-422
communications, set pin 1 of SW2 of
all Inverters to ON. In the case of
RS-485 communications, set pin 1 of
SW2 of only the Inverter located at
each end of the network to ON.
·
Master’s program error.
®
Check the start of communications
and correct the program.
·
Communications circuit damage.
®
If the same error is detected as a
result of a self-diagnostic test, change
the Inverter.
Maintenance Operations Chapter 8