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General Description of Operation
This section describes the data communication between the A2C, the remote
I/O module and the remote terminal module.
See Section 4.2 for the A2C functions.
ON/OFF data communication between the A2C and the remote I/O module
ON/OFF data communication is performed using inputs (X) and outputs
Input/output number assignment of the remote I/O module
The input/output numbers of the A2C system are assigned from
to X/y1 FF in the order of the station number (1 to 64) set for each remote
Data communication with a remote I/O module is performed using
inputs (X) and outputs
assigned for each module.
See Section 4.7 for the relationship between station numbers and i/O
(2) ON/OFF data communication with the remote I/O module
The ON/OFF data communication with the remote I/O module is per-
formed in the refresh mode.
Fig. 1.1 shows the data communication between the A2C and the
remote I/O modules.
(b) ON/OFF data of output (Y) is output.
(a) Sequence program execution
/ ' (c) ON/OFF data from the
input (x) module Is taken in.
0 - - - - - -
The sequence program uses input (X) and
numbers to control remote I/O
When the A2C is running, operations (a), (b) and (0) mentioned below are executed repeatedly.
(a) The sequence program is executed from step 0 to END (FEND).
(b) ON/OFF data of an output (Y) in the sequenca program is output by the MINI-S3 link.
(c) ON/OFF data from an input module is taken In by the MINI-S3 link.
Fig. 1.1 ON/OFF Data Communication between the A2C and the Remote I/O Modules