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RS-232 Device Control Protocol
Overview
The FT6 full duplex RS-232 scheme enables a system programmer to control FT6 functions. All commands are
sent as ASCII strings. No delays between characters or commands are required, as data is interrupt driven and
buffered.
The 2 status groups are: Channel/Source Select and Audio Levels/Mode. Each of the groups has one ASCII
status response string containing all of the status data for that group. The current status string of a group is
sent from the ICC-STA whenever a valid command for that group is received from the iC-Net bus, the RS-232
ports (Terminal or Control port), or the FT6 panel. In addition, both strings are sent when the units power up.
Communications settings are fixed at 1200 baud, 8 data bits, no parity, and 1 stop bit.
General protocol specifications
Characters in command strings to the FT6 are common ASCII keyboard characters.
Command strings begin with the ASCII > (greater than symbol) as an 'Attention' character and end with
carriage return - ASCII CR, Hex $0D, or keyboard Enter - as an 'End-of-command' character.
Responses begin with the ASCII < (less than symbol) as an 'Attention' character and end with a carriage return
followed by line feed an ASCII LF or Hex $0A as 'End-of-command' characters.
A carriage return is required at the end of each command and is assumed in all examples
Command String Structure
[Attention] [Command] (Parameters) [Return]
Attention
Single character (>) starts the string
Command
A two-character command
Parameters
Added attributes to some commands
Return
A carriage return ends the command string, you may use ASCII CR, Hex $0D, or keyboard
'Enter' in programming. For simplicity, the programming examples in the manual will not show
the 'CR' – so remember, you'll need to add it in your control code.
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ICC-STA/FT6