Precautions For Handling Files - Mitsubishi MELSEC-Q Series User Manual

7
MEMORIES AND FILES HANDLED BY C CONTROLLER
MODULE

7.2.2 Precautions for handling files

The following are the precautions for handling the files of the C Controller module.
(1) Precautions for file writing
(2) Precautions for power-off (including reset) during file operation
(3) Precautions for operation performed for the same file
7
- 5 7.2 File Operation and Handling Precautions
7.2.2 Precautions for handling files
When writing a file to the standard ROM or CompactFlash card, set the C Controller
module to the STOP status.
When writing a user file through FTP or copy registration from the CompactFlash card
to the standard ROM, close all running user programs in the C Controller module.
Powering off or resetting the C Controller system (including remote RESET) while
writing a user file to the standard ROM or CompactFlash card may corrupt the data or
generate a file system error.
When a file is being written to the standard ROM or CompactFlash card, perform the
following before powering off or resetting the system.
(a) When writing a file to the standard ROM
Close the file being written.
(b) When writing a file to a CompactFlash card
Close the file being written, and unmount the CompactFlash card.
( Section 5.8.2, 5.8.3)
Access to a file being written is not allowed in the C Controller module.
Writing data to a file being accessed is also not allowed.
When performing multiple operations to the same file, therefore, complete one
processing before starting another.