Cautions On Using Ana, A2As, Anu, Qcpu-A (A Mode) And A2Ush Board; The Number Of Steps Used In Instructions - Mitsubishi MELSEC-A Series Programming Manual

3. INSTRUCTION STRUCTURE

3.8 Cautions on Using AnA, A2AS, AnU, QCPU-A (A Mode) and A2USH board

3.8.1 The number of steps used in instructions

T0
T300
This section gives the cautions to be exercised when AnA, A2AS, AnU, QCPU-A (A
Mode) and A2USH board is used.
(1) The number of steps increases by one every time a device assigned as shown
below (device extended by AnA, A2AS, AnU, QCPU-A (A Mode) and A2USH
board) is used in each instruction.
Device Name
I/O
Internal relay
Timer
Counter
Link relay
Data register
Link register
Annunciator
Index register
Index register
If index qualification is performed to the extension device with the extension
index register, the number of steps increases only one.
Example
• When basic devices only are used:
+ D0
• When extension devices are used:
+ D0
Extension device
X, Y
M, L, S
T
C
B
D
W
F
Z
V
LD
W010
+
LD
W800
+
Extension device
3 − 14
Range
AnA
-
2048 to 8191
256 to 2047
400 to FFF
1024 to 6143
400 to FFF
400 to FFF
256 to 2047
1 to 6
1 to 6
T0.......................... 1step
D0 W010................ 5 steps
Total 6 steps
T300......................1+1=2 steps
D0 W800...........5+1=6 steps
Total 8 steps
MELSEC-A
A2AS, AnU,
QCPU-A (A Mode),
A2USH board
800 to 1FFF
400 to 1FFF
1024 to 8191
400 to 1FFF