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3. PROCEDURES PRIOR TO COMPUTER LINK FUNCTION
OPERATIONS DESCRIBED IN THtS GUIDEBOOK
MELSEC-A
3.
PROCEDURES PRIOR TO COMPUTER LINK FUNCTION
OPERATIONS DE-
SCRIBED IN THIS GUIDEBOOK
3.1
Settings and Procedures before Operations
This section describes the settings of the computer link functions covered in
this guidebook and operation procedures.
The AJ71 UC24 is used for computer link module, and the A3UCPU for PC
CPU.
Determining the
system configuration
Setting hardware
....
(1)
Setting transmission
....
control procedure
(2) Setting transmission
....
specifications
(3) Specifying a station
....
number
Self-loopback test
....
External wiring
....
Loopback test
....
The system consists of a computer and
a PC CPU (1:i).
Refer to Section 3.1
.l.
Set the switches on the face of the
Make settings of the RS-232C interface
for computer link operations.
Refer to Sections 4, 5, and 6.
Set transmission specifications, main
channel, etc.
Refer to Section 3.1.2.
Set the station number to specify which
AJ71 UC24 the computer should access
when a dedicated protocol is used.
Refer to Section 4.
AJ71 UC24.
Test the A J f l UC24 unconnected to the
computer to see if it works properly.
Refer to Section 3.2.
Connect the computer
and
the
AJ71 UC24 with an RS-232C cable.
Refer to Section 3.3.
Check the computer and the AJ71 UC24
to see if they communicate with each
other properly.
Refer to Section 3.5.
Selecting
a
mode
7
Dedicated
mode
mode
N O - ~ O I O C O I
protocol
Bidirectional
.
.
4
Section
4
Section
5
Section
6
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