Mps, Mrd, Mpp - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
7.8

MPS, MRD, MPP

Outline
FX FX and FX
3G, 3U
operations.
1. Instruction format
MPS
Memory Point Store
MRD
Memory Read
MPP
Memory POP
2. Applicable devices
Bit Devices
Instruc-
System User
tion
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
MPS
MRD
MPP
Explanation of function and operation
These instructions are convenient in programming branched multi-output circuits.
1. MPS, MRD, and MPP instructions (stores the current result of the internal PLC operations, reads
the current result of the internal PLC operations, and pops (recalls and removes) the currently
stored result)
MPS
X004 X005
18
X006
MRD
X007
MRD
MPP
• Use MPS instruction to store the intermediate result of operation, and then drive the output Y002.
• Use MRD instruction to read the stored data, and then drive the output Y003.
MRD instruction can be programmed as many times as necessary.
• In the final output circuit, use MPP instruction instead of MRD instruction.
MPP instruction reads the stored data described above, and then resets it.
200
PLCs have 11 memories called "Stack" which store the intermediate result (ON or OFF) of
3UC
Mnemonic
Basic Instruction
MPS
1 step
−
Mnemonic
Basic Instruction
MRD
1 step
−
Mnemonic
Basic Instruction
MPP
1 step
−
Digit Specification
0018 LD
Y002
0019
0020 AND X005
Y003
0021 OUT Y002
0022
Y004
0023 AND X006
0024 OUT Y003
Y005
0025
0026 OUT Y004
0027
0028 AND X007
0029 OUT Y005
0030 END
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Word Devices
Special
System User
Unit
V
There are no applicable devices.
There are no applicable devices.
There are no applicable devices.
X004
MPS
1
2
3
MRD
MRD
10
11
MPP
7 Basic Instruction
7.8 MPS, MRD, MPP
Others
Con- Real Charac-
Index
stant Number ter String
Z Modify K H E
MPP
[2]
MRD
[1]
MPS
MPP
Stack
Pointer
" " P