I
4. A2CCPU
--------------------
MELSEC-A
(2) Relationship between
occupied
number
of
points
and
station (lumbers
(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.
•
Statlon
number:
14
Station
number:
6
(occupies
statlons 6 to 9)
POINTI
I
A2CCPU
I
I I
B-point
I/O
B-point
I/O
module
module
1
stations
1
station
occupied
occupied
I I
32-point
I/O
32-point
I/O
module module
4 stations
4 stations
occupied
occupied
I
IRemote
terminal
module
4
stations
occupied
Station
number.
10
(occupies
stations
10 to 13)
Fig.
4.26
Example
of
Station
Number
Setting
Station
number:
1
Station
number:
2
(occupies
stations
2 to 5)
(1) If
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.
(2) If station
number
is skipped,
the
skipped
station
number
becomes a
faulty station, and M9061 is turned ON.
The ERR LED on
the
front of
the
A2C is
turned
ON.
4-75
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