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SIS
Communication
and Control
The DVS 304 can be remotely controlled via a host computer or other device (such as a
control system) attached to the rear panel RS-232 connector or the LAN port.
The DVS 304 can be configured and controlled by the Extron Simple Instruction Set
(SIS
(SPPCP), or via the devices internal HTML Web pages.
This section describes SIS communication and control. Topics that are covered include:
•
•
The scaler uses a protocol of 9600 baud, 1 stop bit, no parity, and no flow control and the
rear panel RS-232 9-pin, D connector has the following pin assignments:
NOTE: If contact closure is not in use, pins 1, 4, 6, and 7 should have no connection.
Host to Scaler Communications
SIS commands consist of one or more characters per field. No special characters are
required to begin or end a command sequence. When the DVS 304 determines that a
command is valid, it executes the command and sends a response to the host device. All
responses from the scaler to the host end with a carriage return and a line feed
(CR/LF = ]), signaling the end of the response character string (one or more characters).
) of commands, or by using the Extron Signal Processing Products Control Program
™
Host to Scaler Communications
Command and Responses
Pin
RS-232 Function
1
Input #1
2
Tx
3
Rx
4
Input #2
5
Gnd
6
Input #3
7
Input #4
8
-
9
-
Description
Contact closure
Transmit data
Receive data
Contact closure
Signal ground
Contact closure
Contact closure
No connection
Reserved
DVS 304 Series • SIS Communication and Control
5
1
9
6
DB9 Pin Locations
Female
30
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