X
X
L
L
D
D
C
C
M
M
A
A
N
N
.
.
d
d
o
o
c
c
1
1
-
-
1
1
1
1
R
R
E
E
V
V
E
E
1-60 SERIAL INTERFACE
The Serial Port can be connected to a terminal or computer. These instructions assume that a terminal
is connected. The SERIAL connection and data format are explained in the following sections. The
Serial functions are explained in manual Section III.
1-61 RS-232/RS-422 CONNECTION
A male 9-pin D connector (9-pin D) provides a serial, asynchronous, bi-directional data port. This Serial
I/O data port is factory configured with either RS-232 (STANDARD) or RS-422 (OPTION) signal levels.
The RS-232 output is compatible electrically and mechanically with the EIA Standard RS-232C as
described for
data terminal equipment (DTE)
. A copy of the RS-232 Standard is available from
Electronic Industries Association, Engineering Department, 2001 Eye Street, N.W., Washington, D.C.
20006. This reference is suggested for any user of this system, as it is the industry-accepted standard.
Messages are sent and received using ASCII-coded characters in most standard data rates and
formats. The mating D connector for P4 is a female 9-pin (9-pin D). If a 9 to 25 pin adapter cable is
used, the Serial Port pin assignments are as follows:
9-PIN to 25-PIN
ADAPTER CABLE
SIGNAL DESCRIPTION
DB-9P DB-25P
1...............................8
2------------<------------3
RxD, RECEIVED DATA
3------------>------------2
TxD, TRANSMITTED DATA
4.............................20
5-----------<>-----------7
SIGNAL GROUND
6...............................6
7...............................4
8...............................5
9.............................22
When configured for RS-422 operation, the I/O connections are:
9-PIN to 25-PIN
ADAPTER CABLE
SIGNAL DESCRIPTION
DB-9P
DB-25P
1----------<------------8
RxD-, RECEIVED DATA
2----------<------------3
RxD+, RECEIVED DATA
3---------->------------2
TxD+, TRANSMITTED DATA
4---------->----------20
TxD-, TRANSMITTED DATA
5---------<>-----------7
SIGNAL GROUND
6............................6
7............................4
8............................5
9..........................22
Содержание 151-600
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