Mitsubishi Electric MELSEC iQ-R Series User Manual page 124

Transient transmission cannot be performed.
The following lists the actions to be taken if transient transmission cannot be performed.
Check item
Does any error occur during execution of transient transmission?
Is the setting of the station number in the connected station correct?
Are the following control data of the dedicated instruction correct?
 Is the CPU type of the target module correct?
 Is the network number of the target station correct?
 Is the target station number correct?
Is the routing parameter for the sending source of transient transmission
correct?
Have the routing parameters of the relay station correctly been set?
Is the network number duplicated on the network?
Is a value out of the range set for the CPU type in the target station?
Is the communication path to the target network number decided?
Does the relay station to be passed support the dynamic routing function?
Are multiple link dedicated instructions with same channel setting executed
simultaneously?
Is the access range of transient transmission satisfied?
Does the communication pass through the network module in the standby
system when passing through the redundant system?
Is the version of the QCPU and network module in the target station the one
shown below?
• QCPU: Serial number (first five digits) of "06092" or later
• Network module: Serial number (first five digits) of "06092" or later
Is the number of resends set every time an instruction is executed?
Is the station issuing the link dedicated instruction set to offline?
If the above action does not solve the problem, perform the communication test and self-diagnostics test to check for failure in
the network configuration or module. ( Page 119 Communication Test, Page 95 Self-diagnostics test)
4 TROUBLESHOOTING
122
4.4 Troubleshooting by Symptom
Action
Follow the instruction displayed on the window.
Correct station numbers.
Correct the control data of the dedicated instruction.
Correct the "Routing Setting" of "CPU Parameters".
 MELSEC iQ-R CPU Module User's Manual (Application)
Correct the "Routing Setting" of "CPU Parameters".
 MELSEC iQ-R CPU Module User's Manual (Application)
Change the duplicated network number.
Correct the setting according to the manual of the CPU in the target station.
• Power on the system and start transient transmission after a while.
• When "Dynamic Routing" under "Application Settings" of the station on the
communication path is set to "Disable", change it to "Enable". Correct the
setting if the setting in "Link Refresh Settings" of "Basic Settings" is
incorrect.
If the relay station to be passed does not support the dynamic routing function,
set all the stations on the communication path in "Routing Setting" of "CPU
Parameter".
• Set different channel to each instructions.
• Shift the execution timing of the link dedicated instructions.
Correct the system configuration.
Change the routing parameter using the RTWRITE instruction so that the
communication passes through the network module in the control system.
Use the QCPU and network modules with the following version.
• QCPU: Serial number (first five digits) of "06092" or later
• Network module: Serial number (first five digits) of "06092" or later
Correct the program so that the number of resends is set every time an
instruction is executed.
• Set the station issuing the link dedicated instruction to online and execute
the link dedicated instruction.
• To check the online status with the program, use 'Mode setting of own
station' (SB0043) as an interlock.