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APPX
Appendix 3 Troubleshooting by Symptom
File access fails
Check the following items.
Connection with peripherals fails
Check the following items.
File read from a C Controller module fails
Check the following items.
Check item
Corrective action
The CARD RDY LED is OFF when the read/write target is an SD memory
card.
Insert an SD memory card or re-insert an SD memory card.
The USB RDY LED is OFF when the read/write target is a USB Mass Storage
Class-compliant device.
Connect a USB Mass Storage Class-compliant device or reconnect a USB
Mass Storage Class-compliant device.
The SD memory card is write-protected when write target is the SD memory
card.
Cancel the write protection of the SD memory card. (Refer to the manual for
the SD memory card used.)
There is no free space in the write target drive.
• Secure a free space in the write target drive.
• Change the write target to another drive.
The user program that uses the write target file is running.
Stop the user program that uses the write target file.
A file system error occurred in an SD memory card or a USB Mass Storage
Class-compliant device.
• Restore the file system in the SD memory card or the USB Mass Storage
Class-compliant device.
• Format the SD memory card with CW Configurator. Use an applicable SD
memory card.
• Format the USB Mass Storage Class-compliant device with the supported
file system by using a personal computer. (
• Do not partition the drive of a USB Mass Storage Class-compliant device.
The network is in the overloaded conditions.
Disconnect the other Ethernet devices, and establish the connection only with
the C Controller module.
Check item
Corrective action
The system in a multiple CPU system is faulty.
Reset the multiple CPU system and restart it.
The network is in the overloaded conditions.
Disconnect the other Ethernet devices, and establish the connection only with
the C Controller module.
Check item
Corrective action
Check the transfer mode of FTP.
Change the transfer mode of FTP to an appropriate mode.
Summary of Contents for MELSEC iQ-R C R12CCPU-V
Page 1: ...MELSEC iQ R C Controller Module User s Manual Application R12CCPU V ...
Page 2: ......
Page 23: ...1 EXECUTING PROGRAMS 1 3 I O Access Timing 21 1 MEMO ...
Page 32: ...30 3 MEMORY CONFIGURATION OF C Controller Module 3 4 Files MEMO ...
Page 257: ...I 255 MEMO ...
Page 261: ......