Input Data - Mitsubishi MELSEC-Q series Programming Manual

(3) Loop tag past value memory
(a) The loop tag past value memory is an area used by the CPU module system at the time of process control
instruction execution.
The user cannot write data to this memory during run.
If the user writes data to the loop tag past value memory during run, normal operation cannot be performed.
(b) The loop tag past value memory is a 32-word area after the loop tag memory.
(c) At the start of the process control instruction, write "0" to the loop tag past value memory.
3.3.2

Input data

(1) Input data is variable data given to each process control instruction.
(2) The input data uses the block word of the block memory that stores the operation result of the process control instruction
executed previously.
Input data
*For the block memory, refer to Page 29, Section 3.3.3.
(3) The application of the input data changes depending on the used instruction. Refer to the explanation section of the
corresponding instruction.
28
Process control instruction
Operation result
S.IN
Block word
Block bit
Process control instruction
Operation result
S.PHPL
Input data Block word
Block bit
Transferred by user
Block memory*