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3.37.3 Operations and functions that cannot be executed for devices
in write-protected range
This section describes operations and functions that cannot be executed for devices in the write-protected range.
*1 If a label is specified, the operation cannot be performed when the device assigned to the label is in the write-protected
range.
*2 Device data writing by index modification or indirect specification cannot be executed regardless of the write-protected
range. When the write-protected range has been set for the file register (ZR (R)), an error occurs in the file register (R) at
registration.
*3 SD339 (Latch clear operation setting) is not cleared.
*4 When index modification is specified to the setting value of the timer or counter, an error occurs.
Operation and function
Operation from the
programming tool
Modify value
*1
Watch window
Device/buffer memory batch monitoring
Local device monitoring
Write to PLC
Device memory
Initial device value
File register
Remote operation
Remote RUN when clearing is specified in clear mode
Remote latch clear
Clear PLC memory
Clear device's whole memory
Clear all file registers
External input/output forced on/off function
• Registration
Executional conditioned device test
• Registration
*2
Others
Device data writing and writing of files using the SLMP/MC protocol ( Page 309, Section 3.37.3 (1))
Device data writing and writing of files by instructions ( Page 310, Section 3.37.3 (2))
Device data writing and writing of files by FTP ( Page 310, Section 3.37.3 (3))
Device data writing from the programmable controller in another station or another CPU module
Simple PLC communication function
• "Write" or "Transfer" from the communication destination
Latch clear by using the special relay and special register areas
*3
Change TC setting value from GOT when the setting value has been specified by the device
*4
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