Mitsubishi Electric MELSEC-L LD75P User Manual page 636

(3) Functions
(a) The ZP.PFWRT instruction completion can be confirmed using the complete devices
((D)+0) and ((D)+1).
Complete device ((D)+0): This device is turned ON by the END processing of the scan for which ZP.PFWRT
instruction is completed, and turned OFF by the next END processing.
Complete state display device ((D)+1): This device is turned ON and OFF according to the state in which
ZP.PFWRT instruction is completed.
• When completed normally: Kept unchanged at OFF.
• When completed abnormally: This device is turned ON by the END processing of the scan for which
ZP.PFWRT instruction is completed, and turned OFF by the next END processing. (same ON/OFF
operation as complete device).
Program
ZP.PFWRT instruction
Complete device
Complete state display
device
(4) Errors
(a) When a dedicated instruction is completed abnormally, the error complete signal
((D)+1) is turned ON, and the error code is stored in the complete status ((S)+1).
Check and take measures against the error referring to  Page 650, Section 15.5.
(5) Precautions
(a) Do not turn ON the power and reset the CPU module while parameters, positioning
data and block start data are written to the flash ROM using the ZP.PFWRT
instruction.
A parameter error will occur or normal positioning start will become impossible because the parameters,
positioning data and block start data are not written normally to the flash ROM.
If this occurs, restart the operation by the method shown below.
• For GX Works2, write the parameters, positioning data and block start data again to the flash ROM.
• For a program, write the parameters, positioning data and block start data to the LD75 after initializing the
parameters (ZP.PINIT instruction execution and others). Then execute the ZP.PFWRT instruction again.
634
END processing END processing
ON
OFF
OFF
OFF
END processing END processing
ZP.PFWRT instruction
execution completion
ON
When
completed
ON
abnormally
When completed
normally
1 scan