User`s guide

SWITCHERS
11
7.3 RS-232 PROTOCOL
The following commands are used to control the
MX2222AT Switcher. The commands must be
issued as shown, in ALL CAPS and with the
brackets [ ] included in the command string.
Command Function
[VERN] Returns the version number of the
firmware followed by an [OK]
command.
Delay: 50 milliseconds
[RSET] Resets switcher to “power-on”
state. Feedback code: [OK].
Delay: 500 milliseconds
[FRSET] Resets switcher to the factory
state. Memory is reset to factory
default. Feedback code: [OK].
Delay: 2 seconds
[Ixnn] Selects switcher input. Feedback
code: [OK].
Delay: 200 milliseconds
x - refers to group to be switched. There are
a total of 6 groups available. Each group
can have up to 6 channels associated
with it.
nn – refers to the channel selected. This
should be either 01 or 02. No other
values are allowed.
When controlling the MX2222AT by RS-232, it will
typically be preset in either its standard factory
default mode or in independent channel switching
mode (these modes are preset during power-up of
the unit).
In the factory default mode, the groups are set as
follows:
Group 1 RGBHV
Group 2 Video
Group 3 Audio
Group 4 User programmable
Group 5 User programmable
Examples of input selections in factory default
mode:
To switch RGBHV
to Channel 1 [I101]
To switch RGBHV + Audio
to Channel 2 [I102][I302]
The buttons in the RGBHV section of the front
panel affect Group 1, the buttons in the VIDEO
section of the front panel affect Group 2, and the
buttons in the AUDIO section of the front panel
affect Group 3.
For most applications, there is no need to change
the groups. For applications requiring unusual
switching capabilities, the MX2222AT allows the
user to control each individual channel
independently or to assign specific channels to
specific groups with any group being able to
contain up to all six channels.
In the independent channel switching mode, the
groups are set up as follows:
Group 1 Red
Group 2 Green
Group 3 Blue
Group 4 Horizontal Sync
Group 5 Vertical Sync
Group 6 Video
Examples of input selections in independent
channel switching mode:
To switch Green
to Channel 2 [I202]
To switch H & V Sync
to Channel 1 [I401][I501]
Note: if the control system or computer being
used to control the MX2222AT is not setup
to pause for the [OK] string, it is important to
include a delay between each command.
Delay times are shown for each of the
commands.