Mitsubishi Electric MELSEC-Q Series User Manual page 310

Error code
Description
(hexadecimal)
BC57 Multiple requests error
BC58
Message transmission
handshake failure
BC59
BC5A System error
Abnormal response
BC5B
received
Message transmission
BC5C to BC5F
handshake failure
Invalid number of
messages that were
BC60
simultaneously
transmitted
Number of concurrent
execution error
BC70
(remote device station
access)
Unsupported function
BC71 error (remote device
station access)
Target station error
BC72 (remote device station
access)
308
Error cause (details)
Multiple peripherals tried to
access the same message
transmission or remote device
station at the same time.
With the message transmission
function, abnormal data were
received.

With the message transmission
function, an abnormal response
was received.
With the message transmission
function, abnormal data were
received.
• The message transmission
function was executed
simultaneously for five or more
remote device stations.
• The message transmission
function was executed
simultaneously for five or more
intelligent device stations.
The peripherals sent requests to
the remote device station
exceeding the number of
concurrent execution.
The remote device station access
function was attempted to be
performed to a station other than
the master station.
The remote device station to be
accessed from the peripherals is
any of the following.
• The station is not set in the
network parameter.
• The station is not the station
with the start station number.
• The station has been reserved.
• A data link error (including an
error in all stations) has
occurred.
Corrective action
Perform the processes one by
one.
Execute the message
transmission function again.
If the same error persists, the
master module or remote device
station may be faulty. Please
consult your local Mitsubishi
representative.
Please consult your local
Mitsubishi representative.
Check the operation of the target
remote device station.
Execute the message
transmission function again.
If the same error persists, the
master module or remote device
station may be faulty. Please
consult your local Mitsubishi
representative.
Execute four requests or less at
the same time.
Execute four requests or less at
the same time.
Perform the function from the
master station.
Check the parameters or
operations of the target station.
Delectability
Master Local
station station
×
×
×
×
×
×
×
×
×