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

Operation results push, operation results read, operation results
pop
MPS, MRD, MPP
High
Basic
Process
performance
Setting Internal device
data
Bit
 
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
X0
• Ladder not Using MPS, MRD, and MPP Instructions
X0
X0
X0
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.
5 SEQUENCE INSTRUCTIONS
140
5.2 Association Instructions
Redundant Universal LCPU
Command
R, ZR
Word
X1 X2
Y10
X3 X4
Y11
X5
Y12
X1 X2
Y10
X1 X3 X4
Y11
X1 X5
Y12
In the ladder display, MPS, MRD and MPP are not displayed.
MPS
MRD
MPP
J\ U\G
Bit Word
Command
Command
Command
Zn Constant Others