Mitsubishi Electric MELSEC-Q/L - Operation Results Push, Operation Results Read, Operation Results Pop

140
5 SEQUENCE INSTRUCTIONS
5.2 Association Instructions
Operation results push, operation results read, operation results
pop
MPS, MRD, MPP
Processing details
■MPS
• Stores the memory of the operation result (ON or OFF) immediately prior to the MPS instruction.
• Up to 16 MPS instructions can be used successively. If the MPP instruction is used during this process, the number of uses
calculated for the MPS instruction will be decremented by one.
■MRD
• Reads the operation result stored for the MPS instruction, and uses that result to perform the operation in the next step.
■MPP
• Reads the operation result stored for the MPS instruction, and uses that result to perform the operation in the next step.
• Clears the operation results stored by the MPS instruction.
• Subtracts 1 from the number of MPS instruction times of use.
The following shows ladders both using and not using the MPS, MRD, and MPP instructions.
• Ladder Using the MPS, MRD and MPP Instructions
• Ladder not Using MPS, MRD, and MPP Instructions
The MPS and MPP instructions must be used the same number of times.
Failure to observe this will not correctly display the ladder in the ladder mode of the programming tool.
Setting
data
Internal device R, ZR J\ U\G Zn Constant Others
Bit Word Bit Word

Basic
Process
High
performance
Redundant Universal LCPU
In the ladder display, MPS, MRD and MPP are not displayed.
MPS
MRD
MPP
Command Command
Command
Command
Y10
X0
X1 X2
X3
X4
Y11
X5
Y12
Y10
X0
X1 X2
X4
Y11
Y12
X0
X1
X3
X0
X1
X5