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5.
LINKING TO AN ACPU AND AN AJ71 PT32-S3
MELSEC-A
(2)
Remote terminal communications areas (addresses
11 00
to
8099)
Areas for data communications with remote terminal modules.
The communications areas are assigned to two channels. Channel
0
is assigned to remote terminal modules
Nos.
1 to 7. Channel 1 is
assigned to remote terminal modules Nos.
8
to
14.
Channels are automatically selected according to the remote terminal
module station number settings as designated by the MINI-S3 dedi-
cated instructions.
When a data read/write operation is done using a FROM/TO instruc-
tion, the channel should be switched
to the corresponding remote
terminal module. The channel can be switched using the channel
switching signal Y(n+2c).
41001
to
7099
71 00
8099
to
_ _ _ _
I
Sendireceived-
data areas for
remote terminal
module No. 7
Sendheceived-
data areas for
remote terminal
module No. 8
data areas for
remote terminal
module No. 9
Sendheceived-
data areas for
remote terminal
module No. 10
-n
Sendheceived-
data areas for
module No. 14
remote terminal
Y(nt2C) goes OFF.
Y(nt2C) goes
ON.
The remote terminal module number refers to the number assigned to
each remote terminal module set in the initial data ROM of the master
module.
Data read/write is executed for areas which correspond to the module
numbers assigned to each remote terminal module.
5-21
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