Omron CJ2 User Manual page 177

Communications Error (Peripheral (USB) Port)
A communications error will occur if there is an error in communications between the peripheral (USB)
Port and a connected device.
POWER RUN
Lit. Lit.
Error Causes and Remedies
Suspected cause of
error
The communications
cable is disconnected.
Communications Error (Serial Port (RS-232C))
A communications error will occur if there is an error in communications between the serial (RS-232C)
port and a connected device.
POWER RUN
Lit. Lit.
Error Causes and Remedies
Suspected cause of
error
Communications set-
tings are incorrect.
A communications
cable is incorrectly
connected.
A communications
cable is disconnected.
CJ2 CPU Unit Hardware User's Manual
ERR/AL
PRPHL COMM
M
Not lit. Not lit. Not lit.
Confirmation method
Perform a visual inspec-
tion and pull on the cables.
ERR/AL
PRPHL COMM
M
Not lit. Not lit. Not lit.
Confirmation method
• Check whether the DIP
switch pin 5 setting and
and the serial port settings
in the PLC Setup are cor-
rect.
• If a host computer is con-
nected, check the host
computer serial port set-
tings and the program.
• Check the cable connec-
tions.
Perform a visual inspection
and pull on the cables.
CX-Program-
Error flag
mer display
---- None
Remedy
Reconnect the cables.
CX-Program- Error
mer display flag
---- None
Remedy
• Correctly set DIP switch
pin 5 and the serial port
settings in the PLC Setup.
• Correct the host computer
serial port settings and the
program.
• Correct the cable connec-
tions.
Reconnect the cables.
6 Troubleshooting
Error Error infor-
code mation
None None
Prevention of recur-
rence
During operation, confirm
that the connections are
secure. Check for vibration
or shock.
Error Error infor-
code mation
None None
Prevention of recur-
rence
Same as at the left.
Same as at the left.
During operation, confirm
that the connections are
secure. Check for effects
of vibration or shock.
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