Mitsubishi Electric MELSEC iQ-R02CPU - A Dedicated Instruction Is Not Completed

3 TROUBLESHOOTING
3.4 Troubleshooting by Symptom
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A dedicated instruction is not completed.
If the dedicated instruction is not completed when using the RJ71EN71 or the RnENCPU (network part), check if an option
other than "Online" is set in "Module Operation Mode" under "Application Settings".
Set "Online".
Communications using a link dedicated instruction cannot be performed.
When communications using a link dedicated instruction cannot be performed, check the following items and take action.
If the above action does not solve the problem, perform the module communication test to check for hardware failure. (
Page 284 Module communication test)
Access using the file transfer function (FTP server) cannot be performed.
When the Ethernet-equipped module cannot be accessed from the external device (FTP client) using the file transfer function
(FTP server), check the following items and take action.
If the above action does not solve the problem, perform the module communication test to check for hardware failure. (
Page 284 Module communication test)
*1
*1 The module communication test cannot be performed for the CPU module (built-in Ethernet port part). Perform the troubleshooting of
the CPU module and check for hardware failure. ( MELSEC iQ-R CPU Module User's Manual (Startup))
Check item Action
Are the network number and station number set in the Ethernet-equipped
module?
Set the network number and station number.
Is the number of resends set upon every instruction execution? Modify the program to set the number of resends upon every instruction
execution.
Are station numbers unique? Change the duplicated station number.
Is the network number duplicated on the network? Correct the parameters so than the network number is not overlapped.
Is a communication path by the dynamic routing function is determined? • 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".
Does the relay station to be passed support the dynamic routing function? 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".
Are multiple link dedicated instructions with same channel setting executed
simultaneously?
• Set different channel to each instructions.
• Shift the execution timing of the link dedicated instructions.
Check item Action
Is the file transfer function (FTP server) for the Ethernet-equipped module
enabled?
Set "FTP Server" under "FTP Server Settings" of "Application Settings" to
"Use". ( Page 252 FTP Server Settings)
Are the login name and password correct? Check the login name and password set in the parameters, and log in again.
( Page 252 FTP Server Settings)
Is the IP address entered at login correct? Check the IP address of the Ethernet-equipped module set in the parameters,
and log in again. ( Page 243 IP Address)
Is executed command used properly? Check the instructions of the command and use the command properly. (
Page 122 FTP command)
In multiple CPU system, is the access destination CPU module correct? Execute the cpuchg command and change the access destination CPU
module.