..
..
.
. .
.
.
3.
SPECIFICATIONS
MELSEC-A
j
d
3.2.2 RS-23X connector
SpecificaUOns
b
015
016
40
017
018
019
'
020
021
022
loo
023
'lo
024
FrFiamO
ground
I
FG
I I
SD
(TXD)
RD
(RXD)
I
5
I
Clearto wnd
I
CS (CTS)
I
I
6
SG
Signal ground
7
DSR
(DR)
Data set ready
Receive carrier
detection
I=
I
Fig.
3.1 RS-232C Connector Specifications
(1) Signals are described below.
(a) FG signal
Connect the cable shield to pin
1
of the AJ71C24.
If
both the
computer and the AJ71C24 have an
FG
pin, connect the cable
shield to one of the FG pins only.
If
the cable shield is connected to both
FG
pins, the resulting noise
may prevent correct data communications.
(b)
RS
signal
The AJ71 C24 system turns
ON/OFF
the
RS
signal according to the
setting of the CD terminal check (see Section 7.1) and the transmis-
sion method (see Section
7.2),
as
shown below.
CD termlnal
Trans-
Check
Signal
Mathod
Stat.
of
I
the CD
I
RS
Signal
ONlOFF
Control
~
ON
When the AJ71C24
is
in the ready state,
the
Enabled
AJ71C24 system turns
RS
signd
ON.
duplex
Full-
The AJ71
C24
system turns the
RS
signal OFF.
OFF
Disabled
ON
system turns the
RS
dgnal
ON.
(normally
ON)
OFF
~
When the AJ71C24
is
in the
ready
state,
the
AJ71C24
I
-.
.
Half-
Enabled
ON
(always set
duplex
4-
A--hI-rl$
OFF
See Section
5.
Data transmission from the external device should be done confirm-
ing the
RS
signal controlled by
the
AJ71 C24.
(c) CS signal
Data is only transmitted from the AJ71 C24 when this signal is
ON.
i
7
J
7
1
i
d
1
I
7
4
I
d
3-3
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
