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3. PROCEDURE UP TO
DATA COMMUNICATIONS DESCRIBED IN THIS GUIDEBOOK MELSEC
QnA
3 PROCEDURE UP TO
DATA COMMU-
NICATIONS DESCRIBED IN THIS
GUIDEBOOK
3.1 Settings and Procedures
UD
to Data Communications
The following shows the settings and operation procedures for the data communications de-
scribed in this guidebook.
The AJ71QC24 is used as the QC24 and the Q4ACPU is used as the PC CPU.
. . . . .
.
. . .
The external device and PC CPU system
confiauration
IS
1 :1
Described in Section 3.1,l
.
Hardware settings
(1) Transmission control
procedure setting
(2) Transmission specification5
setting
(3) Station No. deagnation
c
.
.
Sets the swltches on the QC24 front Dane1
. . . . . . . .
Sets the RS-232C Interface to Implement
data communicatlons.
Described in Sections 4,
5,
and
6.
'
'
.
Sets the transmisslon speciflcations
Descrlbed in Section 3.1 2
'
.
'
Sets the station No. that designates whlch
QC24 the external device
IS
to access
when a dedicated protocol
IS
used.
Described In Section 4.
Self test
. . . . . . . .
.
Checks if the QC24 operates normally
(1) ROM/RAM switch test
when not connected to an external device.
(2) Self loopback test
Described In Section 3.2.
t
External wlrlng
.
. . .
.
. . .
.
Connects the external devlce and QC24
wlth an RS-232C cable.
Descrlbed in Section 3.3.
v
Loopback test
. . . . .
. . . .
Checks if the external device and QC24
communicate normally.
Described in Section 3.5
T
Dedicated
protocol
Non procedure
Bidirectional
1
1
protocol
protocol
Sectlon 4
Section
5
Section 6
3 - 1
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