3. INSTRUCTION STRUCTURE
3
−
15
MELSEC-A
(2) If index qualification is used in a 1-step sequence instruction (such as LD, OUT),
the number of steps increases one.
Example
•
When index qualification is not used:
•
When index qualification is used:
REMARK
Even when index qualification is used in a 1-step sequence instruction (such as LD, OUT) with
index registers (Z1 to Z6, V1 to V6) extended by AnA, A2AS, AnU, QCPU-A (A Mode) and
A2USH board, the number of steps increases only one.
Example
LD X0 ……………....1 step
OUT Y40 ……….…..1 step
Total 2 steps
LD X0Z………………1+1=2 steps
OUT Y40…………….1 step
Total 3 steps
Index qualification
(
)
X000
Y040
LD X0Z3……………..1+1=2 steps
OUT Y40V6…………1+1=2 steps
Total 4 steps
(
)
X000
Y040
V6
(
)
X000
Y040
Z
D2000Z1 D300 …. 5+1=6 steps
Total 7 steps
T1000………………..1+1=2 steps
D2000 W010Z1……5+1+1=7 steps
Total 9 steps
Extension device
T0…………………….1 step
Extension device
Extension device
T1000
+ D2000
W010
LD
+
Z1
T0
+ D2000
D300
LD
+
Z1
Z3
Содержание MELSEC-A series
Страница 1: ......
Страница 2: ......
Страница 13: ...A 11 MEMO...
Страница 505: ...APPENDICES APP 100 MELSEC A MEMO...
Страница 507: ......
Страница 508: ......