Mitsubishi MELSEC-A Series Programming Manual page 147

6. BASIC INSTRUCTIONS
Program Examples
X008
0
=
9
X007
X007
0
X008
6
11
=
INC
Program which outputs the present value of counters C0 to C20 in BCD to Y30 to 3F
each time X8 turns on.
(When the present value < 9999)
P Z
BCD C0
INC
K
21 Z
RST Z
• Coding
0 LD X008
1 BCDP C0Z K4Y030
6 INCP Z
9 LD= K21 Z
14 OR X007
15 RST Z
18 END
DEC
Down counter program.
P K
MOV 100
M38 P
DED
K
0 D8
• Coding
0 LD X007
1 MOVP K100 D8
6 LD X008
7 ANI M38
8 DECP D8
11 LD= K0 D8
16 OUT M38
17 END
K4
The present value of C(0+Z) is output to the Y30 to 3F in BCD.
Y030
P
Z + 1 is executed
Z
Z is set to 0 when Z = 21 or by X7 (reset input).
D8 When X7 turn on, 100 is transferred to D8.
When M38 is off, D8 – 1 is executed if X8 turns from
D8
off to on.
( M38 )
When D8 = 0, M38 turns on.
6 − 35
MELSEC-A