Storing/Reading/Clearing The Operation Result - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

Storing/reading/clearing the operation result

MPS, MRD, MPP
RnPCPU RnPCPU
RnCPU RnENCPU
(Process) (Redundant)
• MPS: Storing the operation result
This instruction stores the operation result (on/off) immediately before the MPS instruction.
• MRD: Reading the operation result
This instruction reads the operation result stored by using the MPS instruction.
• MPP: Clearing the operation result
This instruction clears the operation result stored by using the MPS instruction.
Ladder
MPS
MRD
MPP
(In the ladder display, these instructions are hidden.)
FBD/LD
EN ENO
■Execution condition
Instruction
MPS
MRD
MPP
Processing details
■MPS
• This instruction stores the operation result (on/off) immediately before the MPS instruction.
• Up to 16 MPS instructions can be used consecutively. If the MPP instruction is used in the middle of the program, the
number of MPS instructions used is decremented by one.
■MRD
• This instruction reads the operation result stored by using the MPS instruction, and performs operations from the next step
based on the operation result.
■MPP
• This instruction reads the operation result stored by using the MPS instruction, and performs operations from the next step
based on the operation result.
• This instruction clears the operation result stored by using the MPS instruction.
• This instruction decrements the number of MPS instructions used in the program by one.
RnSFCPU RnSFCPU
(Standard) (Safety)
Execution condition
Every scan
ST
ENO:=MPS(EN);
ENO:=MRD(EN);
ENO:=MPP(EN);
5 SEQUENCE INSTRUCTIONS
5.2 Association Instructions
5
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