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APPENDICES
MELSEC-A
2.3
Function Comparison
Data
communications
Dedicated
using AnACPU
protocols
1
dedicated
to 4
commands with the
A2ACPU(.Sl) and
A3ACPU.
communications
computer
(RS-232C or RS-422)
Data communications control i n the
half-duplex transmission (RS-232C)
'm :
n'
multidrop link
Using the AnACPU dedicated
commands, data communications is
possible with all device memories,
extension file registers, and extension
comments of the A2AlA3ACPU.
Data communications with a computer
i n the bidirectional mode is possible.
(Possible i n a l-to-1 base system
configuration)
Data communications with an external
device supporting the hslf-duplex
transmission function
can
b e
controlled according to the setting by
the
user.
Data communications in the multidrop
link in which the ratio of computers to
PC CPUs is 'm : n' is possible.
See
Section
3.3.1 (2)
8
7.5
10
5
6
-
APP
-
5
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