Mitsubishi Electric M800VW Series Programming Manual page 155

M800V/M80V Series PLC Programming Manual (1/2)
7 Basic Instructions
7.2 Connection Instructions
MPS, MRD, MPP: Store, read and clear of operation result
Setting
Bit device
data
X Y M L F
[Instruction symbol] [Execution condition]
 Functions
MPS
 Stores in memory the operation result (ON or OFF) immediately prior to the MPS instruction.
 Up to 7 MPS instructions can be used successively.
However, if an MPP instruction is used in the middle of 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.
POINT
(1) The following shows ladders both using and not using the MPS, MRD, and MPP instructions.
Ladder using the MPS, MRD, and MPP instructions.
X0 X1 X2
X3 X4
X5
IB-1501667-B
Usable devices
B SB T SM V T C
MPS, MRD, and MPP are not displayed as a part of the ladder display.
Ladder not using MPS, MRD, and MPP instructions.
X0
Y10
X0
Y11
X0
Y12
Con-
Word device
stant
D R/ZR W SW SD Z K
MPS
MRD
MPP
X1 X2
Y10
X1 X3 X4
Y11
X1 X5
Y12
134
Digit
Pointer designa- Index
tion
H P