Mitsubishi Electric MELSEC FX Series - Page 147

7 Applied Instructions
7.2 Move and Compare
145
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
1
Outline
2
Instruction List
3
Configuration of Instruction
4
How to Read Explanation of Instructions
5
Basic Instruction
6
Step Ladder Instructions
7
Applied Instructions
8
Interrupt Function and Pulse Catch Function
A
Relationships between devices and addresses
Program examples
1. When comparing present value of a counter
If it is necessary to clear the comparison result when the instruction is not executed, add the following
contents under the above program.
1) RST
2) ZRST
*1 Var_CMP is a global label and is defined as M0.
X000
Turns ON in the case of
K100 > C 20 current value.
Turns ON in the case of
K100 = C 20 current value.
Turns ON in the case of
K100 < C 20 current value.
CMP
EN
s1
s2
ENO
d
Var_CMP
*1
K100
CN20
[Structured ladder]
X000
CN20
M0
M1
M2
99
100
101
Latched
in the ON
status.
M0 Y000
M1 Y001
M2 Y002
CMP(X000, K100, CN20, Var_CMP
*1
);
Y000:=X000 AND M0;
Y001:=X000 AND M1;
Y002:=X000 AND M2;
Latched
in the ON
status.
Latched
in the ON
status.
RST
EN ENO
d
M0
RST
EN ENO
d
M1
RST
EN ENO
d
M2
X000
[Structured ladder] [ ST ]
RST(NOT X000, M0);
RST(NOT X000, M1);
RST(NOT X000, M2);
X000
M0
M2
M0 to M2 are reset.
ZRST
EN ENO
d1
d2
[ Structured ladder ] [ ST ]
ZRST(NOT X000, M0, M2);