Serial Communication, cont’d
VSC 200/200D/300/300D Serial Communication
4-2
Serial Communication
The scan converter’s RS-232 connector can be connected to the serial port output of
a host device such as a computer or control system. This connection makes
software control of the scan converter possible. Figure 25 shows a scan converter
RS-232 connection to a host serial port connector.
Figure 25 — Scan converter RS-232 to host connection
The RS-232 connector on the scan converter is a 9-pin D female connector with the
following pin assignments:
Pin
Description
1
Not used
2
Transmit data
3
Receive data
4
Not used
5
Signal ground
6
Not used
7
Not used
8
Not used
9
Not used
The protocol is 9600 baud, 8-bit, 1 stop bit, no parity, and no flow control.
RS-232 Programmer’s Guide
The scan converter accepts SIS (Simple Instruction Set) commands through the
RS-232 port. SIS commands consist of one or more characters per command field.
They do not require any special characters to begin or end the command character
sequence. Each scan converter response to an SIS command ends with a carriage
return and a line feed (CR/LF =
), which signals the end of the response
character string. A string is one or more characters.
OU
T
RS-232
Control Cable
Computer Control
OU
TP
UT
S
VG
A
M
AC
IN
PU
T/L
OO
P O
UT
VG
A O
UT
50
/60 H
z 0.5A
100-2
40
im Vertrieb von
CAMBOARD Electronics
www.camboard.de
Tel. 07131 911201
Fax 07131 911203
