Mitsubishi A2CCPU User Manual page 8

1. INTRODUCTION
/MELSEC
1.1 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.
1.1.1 ON/OFF data communication between the
A2C
and the remote I/O module
ON/OFF data communication is performed using inputs (X) and
outputs (Y).
(1) Inputloutput number assignment
of the remote I/O module
The inputloutput numbers of the A X system are assigned
from X/YOOO to W 1 FF in the order of the station number (1 to
64) set for each remote 110 module.
Data communication with a remote I/O module is performed
using inputs (X) and outputs (Y) assigned for each module.
See Section 4.7 for the relationship between station numbers
and I/O numbers.
(2) ON/OFF data communication with the remote VO module
The ON/OFF data communication with the remote I/O module
is performed in the refresh mode.
Fig. 1.1 shows the data communication between the A X and
the remote I/O modules.
t
I
The
sequence program
UWE
input (X)
and
output
(Y)
numbers to control remote
U O
mod-
I
(b)
ONIOFF
data
of
output
(Y) is
output.
/
(c) ONlOFF data from
the input module
is taken in.
MINI-S3 link
Station: n Station: 5
When the A2C is running, operations (a), (b) and (c) 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 sequence program is output by the MINI43 link.
(c)
ON/OFF data from an input module is taken in by the MINIS3 link.
Fig. 1.1 OWOFF Data Communication between
th. AZC
and the
R.mote I/O Modukr