Communication Error "P/S - Mitsubishi QJ71C24N User Manual

11 TROUBLESHOOTING
Symptom
• An error was generated on the
• The local station CPU on the
• Communication
error signal "C/N"
turned on.
• Module installation address
• A command that cannot be

11.3.9 Communication error "P/S"

Symptom
• Data does not match the
• Sum check codes do
• When CH1 and CH2 are
• Communication
error signal "P/S"
turned on.
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Cause
CC-Link IE Controller Network,
CC-Link IE Field Network,
MELSECNET/H,
MELSECNET/10.
CC-Link IE Controller Network,
CC-Link IE Field Network,
MELSECNET/H,
MELSECNET/10 generated an
error.
designation during
communications with intelligent
function module is incorrect.
transmitted during RUN
(sequence program,
parameters, etc.) was
transmitted, or "Disable write
during RUN" is set.
Cause
parity bit setting.
not match.
used in the linked mode,
the cable is not
connected to one of the
interface.
Corrective action
• Check the error contents from the state
of SB and SW related to the CC-Link IE
Controller Network, CC-Link IE Field
Network, MELSECNET/H,
MELSECNET/10 with the GX Developer
monitor, etc. and perform the checks
and take the corrective action described
in the CC-Link IE Controller Network,
CC-Link IE Field Network,
MELSECNET/H, MELSECNET/10
reference manual.
• Change the transmit message
designation data.
• Stop the CPU and restart data
communications.
• Set the "Enable/disable write during
RUN" switch to "Enable" by command.
Corrective action
• Check the Q series C24 and external device
data format and match the settings.
• Check if the sum check code transmitted from
the external device is correct. (Recalculate)
• When using CH1 and CH2 independently, check
that the Q series C24 is not in the linked mode.
• When using CH1 and CH2 in the linked mode,
also connect the cable to both of the interfaces.
Note
• If the cable is not connected to one of the
interfaces when CH1 and CH2 are used in
the linked mode, noise may enter and the
data may be destroyed and "Data cannot be
decoded" or "Communications error cause"
may occur.
MELSEC-Q
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