Extron Electronics SW4 3G HD-SDI User Guide - Manual (Page 27)

SW4 3G HD-SDI • Serial Communication 3-3
Switcher-initiated 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 2008, Extron Electronics, SW4 3G HD-SDI, Vx.xx]
The switcher issues the copyright message when it first powers
on. Vx.xx is the firmware version number.
Inn]
The switcher sends the Inn message whenever the selected
input is changed using the front panel buttons. “n” is the input
number.
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 active)
E10 – Invalid command
E13 – Invalid parameter
Timeout
Pauses of 10 seconds or longer between command ASCII
characters result in a timeout. The command operation is
aborted with no other indication.