Mitsubishi Electric MELSEC-Q Series User Manual page 309

Error code
Description
(hexadecimal)
BC50
Message transmission
handshake failure
BC51
Message transmission
BC52
handshake timeout
Message transmission
BC53
handshake timeout
BC54
Message transmission
handshake failure
BC55
Error cause (details)
With the message transmission
function, abnormal data were
received.
During execution of message
transmission, a data link error
has occurred on the
corresponding station.
During execution of message
transmission, some parameters
were changed.
With the message transmission
function, abnormal data were
received.
With the message transmission
function, a communication
timeout has occurred.
Data link stop (SB0002) was
executed during the message
transmission.
In the message transmission
function, a stop error in the CPU
module has been detected.
With the message transmission
function, a communication
timeout has occurred.
Data link stop (SB0002) was
executed during the message
transmission.
In the message transmission
function, a stop error in the CPU
module has been detected.
With the message transmission
function, abnormal data were
received.
CHAPTER 11 TROUBLESHOOTING
Corrective action
Check the program to see if any
prohibited remote output (RY) has
not been accessed.
If the same error persists after
checking the above, the master
module or remote device station
may be faulty. Please consult your
local Mitsubishi representative.
Check the operation of the target
remote device station.
Stop the data link, and then
change parameters.
Check the program to see if any
prohibited remote output (RY) has
not been accessed.
If the same error persists after
checking the above, the master
module or remote device station
may be faulty. Please consult your
local Mitsubishi representative.
Increase the value for Monitoring
time setting (SW0009). If the error
occurs again, check the request
destination module and cables.
Stop data link after completion of
message transmission.
Set "Continue" in "PLC Down
Select" to execute the message
transmission while the stop error
has occurred in the CPU module.
Increase the value for Monitoring
time setting (SW0009). If the error
occurs again, check the request
destination module and cables.
Stop data link after completion of
message transmission.
Set "Continue" in "PLC Down
Select" to execute the message
transmission while the stop error
has occurred in the CPU module.
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.
Delectability
Master Local
station station
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11
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