Omron CJ1W-SCU32 Operation Manual page 312

9 Troubleshooting and Maintenance
Event code Event name
64A5 0000 hex Comparison
Error
64A6 0000 hex Reception
Overflow
64A7 0000 hex Command
Format Error
84680000 hex Transmis-
sion Error
84690000 hex Overrun
Error
846A 0000 hex Framing
Error
9-34
Meaning Assumed cause
A comparison error • Loopback test jig failure.
occurred.
• Noise
• The communications circuits in
the Serial Communications Unit
are faulty.
More than the spec- • One or more bytes of data was
ified amount of received after the completion
receive data was the reception.
received in No-pro-
tocol Mode.
An illegal function • An illegal function code,
code or address address, or data was specified
was specified in a in a received Modbus-RTU
received Modbus- command.
RTU command.
A transmission • One of the following errors
error occurred. occurred.
• Tfs (Send Finished Monitor-
ing Time) Exceeded
• Tfr (Receive Finished Moni-
toring Time) Exceeded
• Tr (Receive Wait Monitoring
Time) Exceeded
• FCS Check Error
• Command Error
• Timeout Error
• Overrun Error
• Framing Error
• Parity Error
An overrun • 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.
• No-protocol Mode:
• The reception buffer received
more than 259 bytes of data
before the SerialRcv/Serial-
RcvNoClear instruction was
executed.
• During Loopback Test
• Loopback test jig failure.
• Noise
• The communications circuits
in the Serial Communica-
tions Unit are faulty.
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.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Level
Maj Prt Min Obs Info
√
page 9-46
√
page 9-46
√
page 9-47
√
page 9-47
√
page 9-48
√
page 9-49
Reference