Mitsubishi Electric QJ71DN91 User Manual page 196

9 TROUBLESHOOTING
Error
Detected
code
in:
(Dec.)
306 QJ71DN91 Failed to open a message connection.
317 Slave node The response data length is too long.
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Description Action
• Check whether the parameter value for the message
group is set correctly or not.
• Verify that the transmit message can be responded by
the slave node.
MELSEC-Q
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