4.
A2CcPU
/MELSEC-A
(2)
Relationship between occupied number of points and station
numbers
(a)
I/O
modules and remote terminal modules which have
8
or
more
I/O
points occupy station numbers to be assigned to
several stations; station numbers to be occupied are
consecutive.
The station number occupied by one module cannot be set
for other modules.
For the number
of
stations to be occupied by an
I/O
module and remote terminal module, see Section
2.3.1.
(b) Station numbers to be assigned to
I/O
modules and
remote terminal modules must be consecutive.
When
a
module which has more than
8
I/O
points is used,
the station number of the next module must be assigned
by skipping the number of stations corresponding to the
occupied stations.
A2C CPU
I
&point
1 stations occupied
1 station occupied
I10
module
VO
module
8-point
Station number. 14
.-----.-..-----.._______________.
.-------_
--_________________
____.
Station number: 1
A
32-point
4
stations occupied
4
stations occupied
110
module
VO
module
32-point
.____---_________-__-~-~--------.
._._....-..____..._______________
Station number:
6
(occupies stations
6
to
9)
Station number: 2
Remote terminal
module
4
stations occupied
(occupies stations 2 to
5)
.___._.._._____.____.--.--.-.....
Station number: 10
(occupies stations 10 to 13)
Fig.
4.26 Example
of
Station
Number
Setting
POINT
I
lf
the same station number
is
set for
two
or more stations,
input or output error might occur.
When setting station numbers, take the number
of
stations to be occupied
by
each module
so
that the same
station number will not be used by more than one station.
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