Troubleshooting By Symptom; Canopen 405 Mode - Mitsubishi Electric MELSEC iQ-R Series User Manual

5.4

Troubleshooting by Symptom

This section describes troubleshooting method by symptom. If an error occurs in the RJ71CN91, identify the cause of the
error using the engineering tool. ( Page 136 Checking the Module Status)

CANopen 405 mode

This section describes troubleshooting by symptom in the CANopen 405 mode.
SDO communication is not available
The following table lists the actions to be taken if SDO communication is not available.
Check item
Is the CAN bus cable connected firmly to the transmission cable terminal
block of the RJ71CN91?
Are terminating resistors connected to the both ends of the network?
Is the baud rate the same at all CANopen nodes in the network?
Is the target node capable of normal communication?
Is the RJ71CN91 function mode set to CANopen 405 mode?
Is any node ID duplicated?
Are parameters set correctly for the RJ71CN91?
Is the RJ71CN91 in the bus off state?
The NMT state of a CANopen node does not change to "Operational"
If the NMT state of a CANopen node does not change to "Operational", check the following.
Check item
Are parameter settings of all the flying masters correct?
Does the parameter setting of the NMT master match the system
configuration of the actual NMT slave?
Is the CPU module with which the RJ71CN91 is installed in RUN state?
Is the NMT state of the NMT master Operational?
Is the NMT state of the NMT slave Operational?
Do the current node settings match the parameters?
(Read the settings using the [Read NMT settings] button in CANopen
Configuration Tool, and compare them with the parameters.)
*1 All CDCFs can be deleted by using the [Restore Object Dictionary to default on all nodes] button in the "CANopen Configuration"
window.
Page 82 "CANopen Configuration" window
5 TROUBLESHOOTING
140
5.4 Troubleshooting by Symptom
Action
Connect the CAN bus cable firmly to the transmission cable terminal block.
Connect terminating resistors to both ends of the network.
Ensure that the baud rate is the same at all CANopen nodes in the network.
Check the target node to see if there is any problem.
Set the RJ71CN91 function mode to CANopen 405 mode.
Change duplicated node IDs of CANopen nodes.
Set parameters correctly for the RJ71CN91.
Check the above check items, take actions, and restart the RJ71CN91.
Action
Set parameters correctly for all the flying masters.
Set parameters correctly for the NMT master.
Modify the system configuration correctly.
Set the CPU module with which the RJ71CN91 is installed in RUN state.
• Enable the NMT master start.
• Check whether the startup process failed in the NMT master event history.
• Use the node control function to run remote node start for the own node.
• Check that the NMT slave operates properly.
• Check that the NMT state of the NMT master is Operational.
• Assign the NMT slave to the NMT master.
• Enable the NMT master parameter "NMT boot slave" for the target slave.
• From the NMT master, use the node control function to run remote node
start.
• Delete the unnecessary CDCFs from Concise DCF (index 1F22H, subindex
01H to 7FH) in the object dictionary of the NMT master.
• If the object dictionary with unmatched settings was changed through SDO
communication, modify or delete the relevant process.
*1