Altinex MX2226AT RS-232 Control Commands, Feedback Codes, Key Description Feedback code Pressed

SWITCHERS

5	GND
RS-232 connection of PC with DB-9 port
MX2226AT Terminal Block
PC DB-25 port pin no.	MX2226AT Terminal
IBM PIN No.	block pin
2	RX
3	TX
7	GND

RS-232 connection to MX2226AT Terminal Block of PC with DB-25 port

Port settings of the control system or computer being used to control the MX2226AT Switcher should be set as follows:

BAUD Rate bps (Bits per second): 2400

Data Bits: 8

Parity: None

Stop Bits: 1

There is no software or hardware flow control implemented. The RS-232 input has a 6-character buffer. The MX2226AT Switcher will not execute additional commands until the previous command is fully processed.

7.3 RS-232 CONTROL COMMANDS

The standard RS-232 protocol is used to control the switcher. Commands must be issued as shown, in ALL CAPS and with brackets [ ] that are included in the command string.

RS-232 Protocol: [INP0] All channels off

[INP1] Select input 1

[INP2] Select input 2

[INP3] Select input 3

[INP4] Select input 4

[INP5] Select input 5

[INP6] Select input 6

[RSET] Reset unit to user defaults [VERN] Returns firmware version number

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After processing a valid command, an [OK] string will be returned, followed by a command echo. For instance, if a command, [INP1] is sent to the MX2226AT Switcher, it would return the feedback as [OK] [INP1]. The only exception is that with the [VERN] command, which is the corresponding firmware version of the switcher, [1.0] is returned as feedback.

If a command is not recognized by the switcher, an error string, [ERR], will be returned. Any command other than the previously listed commands will also return [ERR] feedback.

If the control system being used is not set up to, pause for the [OK] string, it is important to include a 100-millisecond delay between each command to allow pause for the processing of the [OK] [COMMAND] string.

The [RSET] function requires at least one minute of processing time. If the Sync Delay function is used, a 2.5-second delay should be maintained between RS-232 commands, to account for the time required processing Sync Delay switching.

If a key is pressed on the front panel, a feedback string is transmitted. This is done to inform a control system that the key has been pressed. This feature allows several switchers used simultaneously to operate in tandem.

7.4 FEEDBACK CODES

Key	Description	Feedback code
pressed
INPUT 1	Input Select	[OK] [INP1]
INPUT 2	Input Select	[INP2]
INPUT 3	Input Select	[INP3]
INPUT 4	Input Select	[INP4]
INPUT 5	Input Select	[INP5]
INPUT 6	Input Select	[INP6]
STEP	Step Input select
ALL OFF	Disable All Inputs	[INP0]
RESET	Reset the Switcher	[RSET] [INPx]
		(x= default input)
VIDEO	Video RGB
OFF	(ON/OFF)
	Sync Delay
DELAY	Switching
	Enabled/Disabled

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