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9 Troubleshooting and Maintenance
9-34
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
64A5 0000 hex
Comparison
Error
A comparison error
occurred.
•
Loopback test jig failure.
•
Noise
•
The communications circuits in
the Serial Communications Unit
are faulty.
√
64A6 0000 hex
Reception
Overflow
More than the spec-
ified amount of
receive data was
received in No-pro-
tocol Mode.
•
One or more bytes of data was
received after the completion
the reception.
√
64A7 0000 hex
Command
Format Error
An illegal function
code or address
was specified in a
received Modbus-
RTU command.
•
An illegal function code,
address, or data was specified
in a received Modbus-RTU
command.
√
8468 0000 hex
Transmis-
sion Error
A transmission
error occurred.
•
One of the following errors
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
√
8469 0000 hex
Overrun
Error
An overrun
occurred.
•
In Serial Gateway Mode or Pro-
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.
√
846A 0000 hex
Framing
Error
A frame error
occurred.
•
In Serial Gateway Mode or Pro-
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.
√
Event code
Event name
Meaning
Assumed cause
Level
Reference
Maj
Prt
Min
Obs
Info
Содержание CJ1W-SCU22
Страница 192: ...4 Using Protocol Macros 4 56 CJ series Serial Communications Units Operation Manual for NJ series CPU Unit W494...
Страница 250: ...6 No protocol Mode 6 22 CJ series Serial Communications Units Operation Manual for NJ series CPU Unit W494...
Страница 460: ...A Standard System Protocol R 126 CJ series Serial Communications Units Operation Manual for NJ series CPU Unit W494...
Страница 473: ...Index 1 CJ series Serial Communications Units Operation Manual for NJ series CPU Unit W494 I Index...