Omron NJ Series Troubleshooting Manual page 166

3 Error Tables
Event code Event name
846A 0000 hex Framing
Error
846B 0000 hex Parity Error
846C 0000 hex Overrun
Error, Fram-
ing Error, or
Parity Error
(Transmis-
sion Error)
846D 0000 hex Transmis-
sion Error
(CRC Error)
3-104
Meaning Assumed cause
A frame error • In Serial Gateway Mode or Pro-
occurred. tocol Macro Mode:
• The reception circuits in the
Serial Communications Unit
are faulty.
• A transmission error occurred
due to noise or other factors.
• During Loopback Test
• Loopback test jig failure.
• Noise
• The communications circuits
in the Serial Communica-
tions Unit are faulty.
A parity error • In Serial Gateway Mode or Pro-
occurred. tocol Macro Mode:
• The reception circuits in the
Serial Communications Unit
are faulty.
• A transmission error occurred
due to noise or other factors.
• During Loopback Test
• Loopback test jig failure.
• Noise
• The communications circuits
in the Serial Communica-
tions Unit are faulty.
An overrun error, • The communications conditions
framing error, or and baud rate settings do not
parity error match the host.
occurred.
• Noise or other external interfer-
ence.
• The baud rate is outside the
allowable range or there are bit
errors due to different stop bit
settings or other parameters.
• The communications cable wir-
ing is faulty.
• Terminating resistance is not
set correctly for the RS-
422A/485 ports.
• Wiring is faulty or terminating
resistance is not set correctly
on an NT-AL001 or other
Adapter.
A CRC error • Noise
occurred.
• CRC calculation method does
not match the device.
Level
Maj Prt Min Obs Info
S CJ-series
Serial Com-
munications
Units Opera-
tion Manual for
NJ-series
CPU Unit (Cat.
No. W494)
S Same as
above.
S Same as
above.
S Same as
above.
NJ-series Troubleshooting Manual (W503)
Reference