Operation Setting At Error Occurrence - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.10

Operation Setting at Error Occurrence

This function can set the NMT state that the RJ71CN91 transitions to if a communication error occurs when the NMT state of
the RJ71CN91 is Operational.
Function details
The following three states can be set as the NMT state that the RJ71CN91 transitions to if a communication error occurs when
the NMT state of the RJ71CN91 is Operational.
• Pre-operational (initial value)
• Stop
• Operational (Not change the NMT state)
The following table lists events that cause a communication error in the RJ71CN91.
Event
The node is in the bus off state.
The node guarding function detected an NMT master error. (Only if the own
node is an NMT slave)
The heartbeat function detected an error of another node. (Only if the own
node is an NMT slave)
The CPU module state changed from RUN to STOP.
*1 For details on operation other than the NMT state when the CPU module is switched from RUN state to STOP state, refer to the
following.
Page 221 Operation of the RJ71CN91 When the CPU Module Operating Status Is Changed
■Setting method
Use the object dictionary to set the operation at error occurrence. For details, refer to the following.
Page 210 Error behavior
1 FUNCTIONS
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1.10 Operation Setting at Error Occurrence
Remarks
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*1
The NMT state will change to Pre-operational even when the operation setting
at error occurrence is set to "Not to change the NMT state".
Note that the NMT state can be changed to Operational even if the CPU
module is in the STOP state.
When the setting is set to other than "Not to change the NMT state", the NMT
state cannot be changed to Operational if the CPU module is in the STOP
state.