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MELSEC-Q
11 INSTRUCTIONS AND FUNCTIONS
(f) Module number of the special function module of a MELSECNET/10 remote
I/O station
The module number of the special function module of a MELSECNET/10
remote I/O station is always the two most significant digits of the 3-digit
expression of the last “I/O address seen from a remote I/O station.”
Specify the module number using the last “I/O address seen from a remote
I/O station” regardless of the settings of the common parameters set at the
master station of the MELSECNET/10 remote I/O net.
Sp
e
c
ial
func
ti
on module
32 p
o
in
ts
Since the last address is 44F
H
,
the special function module number is "44
H
."
O
u
tput
m
odule 3
2
p
o
ints
O
u
tput
m
odule 3
2
p
o
ints
O
u
tput
m
odule 1
6
p
o
ints
O
u
tput
m
odule 3
2
p
o
ints
P
o
w
e
r s
u
pp
ly
mo
du
le
Remote I/O
station No.1
Y
470
48F
Y
450
46F
X/Y
430
44F
Y
420
42F
Y
400
41F
Y
70
8F
Y
50
6F
X/Y
30
4F
Y
20
2F
Y
00
1F
I/O addresses seen from
a remote I/O station
I/O addresses set by
the common parameters
AJ
72LP25
to
to
to
to
to
to
to
to
to
to
• The special function module’s buffer memory contains 16 bits (one word) per one
address and reading/writing operations between the PLC CPU and special
function module are performed with the FROM/TO instruction.
When reading/writing from the special function module’s buffer memory to the
communication module or vice versa, the operation is carried out in units of 8
bits (one byte) per one address.
The addresses to specify in the communication module (hexadecimal) are
obtained by the following conversion from addresses for the FROM/TO
instruction.
Specified address
(hexadecimal)
the starting address
of each module
= convert
(address for the
FROM/TO
instruction x 2)
into a hexadecimal
number
+
[
]
{
}
Example: When specifying address 1 of the FROM/TO instructions (the preset
value of CH.1) of the type AD61 high-speed counter module.
Specified
address 82H
FROM/TO instruction
address 0 x 2, 1H x 2
starting
address 80H
=
+
See the Appendix for the starting address of each special function module.
