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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.
Modify value
Write to PLC
Operation from the
Remote operation
programming tool
Clear PLC memory
External input/output forced on/off function
Executional conditioned device test
Device data writing and writing of files using the SLMP/MC protocol (
Device data writing and writing of files by instructions (
Device data writing and writing of files by FTP (
Device data writing from the programmable controller in another station or another CPU module
Others
Simple PLC communication function
Latch clear by using the special relay and special register areas
Change TC setting value from GOT when the setting value has been specified by the device
*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.
308
Operation and function
*1
• Registration
*2
• Registration
• "Write" or "Transfer" from the communication destination
Watch window
Device/buffer memory batch monitoring
Local device monitoring
Device memory
Initial device value
File register
Remote RUN when clearing is specified in clear mode
Remote latch clear
Clear device's whole memory
Clear all file registers
Page 310, Section 3.37.3 (3))
Page 309, Section 3.37.3 (1))
Page 310, Section 3.37.3 (2))
*3
*4
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