Extron Electronics SW6 VGA A - Manual (Page 13)

SW6 VGA Audio • Remote Control
Remote Control
SW6 VGA Audio • Remote Control 3-3 3-2
The SW6 VGA Audio switcher’s rear panel Remote connector
(figure 3-1) can be connected to the serial port output of a host
device, such as a computer or control system, to an Extron
IR 102 Kit Universal Remote Control, OR to a remote contact
closure device. Remote coontrol of the switcher is via Extron’s
Simple Instruction Set (SIS ™ ), Extron’s Windows ® -based control
program, the IR 102 Kit, or a contact closure device.
REMOTE
PIN RS-232
Contact
Closure Function
1 — In #1 Input #1
Input #2
Input #3
Input #4
Input #5
Input #6
2 TX — Transmit data
3 RX — Receive data
4 — In #2
5 Gnd Gnd Ground
6 — In #3
7 — In #4
8 — In #5
9 — In #6
Figure 3-1 — Remote connector pinout
The RS-232 protocol of the rear panel Remote connector is
9600 baud, 1 stop bit, no parity, and no flow control. The
connector has the pin assignments shown in figure 3-1.
For RS-232 and IR control
, use a control cable with only pins
2, 3, and 5 connected. To accomplish this, either cut the wires
to the other pins in hard-shelled connectors, or remove the
unneeded pins from molded plugs.
For contact closure
, use a control cable with pins 2 and 3 NOT
connected. To accomplish this, either cut the wires to these pins
in hard-shelled connectors or remove these pins from molded
plugs.
Simple Instruction Set Control
Host-to-switcher communications
SIS commands consist of one or more characters per field. No
special characters are required to begin or end a command
character sequence. When a command is valid, the switcher
executes the command and sends a response to the host device.
All responses from the switcher to the host end 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.
Switcher-initiated (unsolicited) messages
When a local event, such as a front panel operation or error
condition, occurs, the switcher responds by sending a message
to the host. The switcher-initiated messages are listed below:
(C) COPYRIGHT 1998, EXTRON ELECTRONICS SW6VGA
AUDIO, Vx.xx ]
The switcher issues the copyright message when it first powers
on. Vx.xx is the firmware version number.
Cn
]
The switcher issues the Cn message when a front panel input
selection operation occurs and immediately following the
copyright message. n is the input number.
Reconfig
]
The switcher initiates this message when there is a change in an
.audio gain setting.
Error responses
When the switcher receives a valid SIS command, it executes
the command and sends a response to the host device. If
the switcher is unable to execute the command because the
command is invalid or it contains invalid parameters, the
switcher returns an error response to the host. The error
response codes are:
E01 Invalid input channel number (out of range)
E06 Invalid input channel change (auto switch mode active)
E09 Invalid function (mode) parameter
E10 Invalid command
E13 Invalid value (out of range).
Timeout
Pauses of 10 seconds or longer between command ASCII
characters result in a timeout. The command operation is
aborted with no other indication.