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9 Troubleshooting and Maintenance
9-8
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
z
Response Received from Remote Device but Error Remains
Error conditions Cause Remedy
Unit status Serial
communica-
tions mode
Indicator
display
Command
end code
sent to
command
source
Confirma-
tion of
device
variable for
CJ-series
Unit, etc.
A normal end
code is
returned from
the remote
device, but
there is no
response data
after the end
code. The serial
communica-
tions mode is
set to Serial
Gateway or
Protocol Macro
Mode. The
RD
@ /SD @
indicators all
flash.
0000 hex --- The command
requires a response,
but the command
after conversion does
not require a
response (e.g.,
broadcasting) Check the specifications of
the command to be con-
verted.
A response
was received
from the
remote device
after a
response time-
out error was
received for a
converted
command that
was sent to the
remote device. 0205 hex
(response
timeout), etc. *_P1(orP2)_T
imeoutErr
(Timeout
Error) is set
to TRUE. A Serial Gateway
response timeout
occurred, but the
response data was
received normally
after the timeout.
This occured because
the
*_P1(orP2)_PmrSgw
RespTimeoutCfg
(Serial Gateway
Response Timeout
Monitoring Time) set-
ting is too short.
Set a longer time for
*_P1(orP2)_PmrSgwRespTi
meoutCfg (Serial Gateway
Response Timeout Monitor-
ing Time).
An error end
code was
returned to the
transmission
source. 0206 hex
(transmis-
sion line
error) *_P1(orP2)_F
CSErr (FCS
Check Error)
or
*_P1(orP2)_
ParityErr
(Parity Error)
is TRUE. Either of the following
errors occurred in the
protocol after conver-
sion.
Conversion to Com-
poWay/F command:
BCC error or parity
error
Conversion to Mod-
bus-RTU command:
CRC error or parity
error
Conversion to Mod-
bus-ASCII command:
CRC error or check-
sum error
Conversion to Host
Link command: FCS
error or parity error
Use shielded twisted-pair
cables.
Lay power lines separately by
using ducts.
Increase the number of
resends at the command
source.
Perform communications
retry as required.
Other error
end code --- The Serial Gateway
was executed, but the
error completion
occurred. Perform error processing
based on the following table
of Cause and Countermea-
sure by Command End Code.