468
27 TROUBLESHOOTING
27.3 Troubleshooting by Symptom
Hardware information communication error "P/S" occurs
Hardware information communication error "C/N" occurs
Symptom Cause Corrective action MC Non Bi Pd
Hardware information
communication error signal
"P/S" turns ON.
The parity bit settings do not
match.
• Review the data format between C24 and the target device,
and match the settings.
Sum check codes do not
match.
• Calculate to check if the sum check code transmitted from
the target device is correct, and correct the sum check code
if it's incorrect.
When CH1 and CH2 are set
for the interlink operation,
there is an interface to which
the cable is not connected.
• When using CH1 and CH2 for the interlink operation,
connect the cable to both of the interfaces.
• When using CH1 and CH2 for the independent operation,
reconfigure the setting to the independent operation if it is
set to the interlink operation.
■Remarks
If the cable is not connected to one of the interfaces when CH1
and CH2 are used for the interlink operation, the data may be
destroyed due to noise and may result in 'data cannot be
decoded' or 'cause of communications error'.
Symptom Cause Corrective action MC Non Bi Pd
Hardware information
communication error signal
"C/N" turns ON.
PC number is specified to the
self-station (FF), or a station
other than the station number
set with the network
parameter.
• Change the PC number to the self-station (FF) or the station
number set with the network parameter, and restart data
communications.
Routing parameters between
the CPU module with C24
mounted and the
communication destination
CPU module are not set.
• Check the routing parameters and set them up to the
communication destination CPU module.
Errors occurred on CC-Link IE
Controller Network or CC-Link
IE Field Network.
• Check the error contents by the status of SB and SW related
to CC-Link IE Controller Network and CC-Link IE Field
Network with the monitor function of Engineering tool etc.,
and take corrective actions in accordance with the reference
manuals for respective network.
Errors occurred on the CPU
module of the host station on
CC-Link IE Controller
Network or CC-Link IE Field
Network.
Module installation address
designation for
communications with
Intelligent function module is
incorrect.
• Change the transmission message designation data.
A command that cannot be
transmitted during RUN
(program, parameters, etc.)
was transmitted, or "Online
change" is set to be disabled.
• Stop the CPU module and restart data communications.
• Enable the "Online change" by command and restart data
communications.
To Next Page
Loading...
