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Sending Commands to the Controller
When you send a command to the controller, you must use the correct command format. The general format of a command is as follows:
<Header>Command<Terminator>
Note: The following descriptions of header, command, and terminator, use 3M Touch Systems terminal emulator key sequences. You may need to enter the sequence in a different format, depending on your emulator.
The header is the first character in the command string and is the ASCII
01.To start the command sequence, use the key combination Ctrl A (^A). If you are
working with an IBM PC compatible system, the Ctrl A key combination immediately returns an ASCII character.
The command, which always follows the header, consists of ASCII uppercase letters and numbers only (printable characters).
The terminator is the last character of each command string and is an ASCII carriage return CR. An ASCII CR control character is 0D hexadecimal. To enter a carriage return, ending the command sequence, use Enter or the key combination Ctrl M (^M).
This appendix lists each command as a string of ASCII control characters and printable characters consisting of a header, the command, and a terminator as follows:
<SOH>Command<CR>
Receiving Responses from the Controller
After executing a command, the controller returns a response or acknowledgment to the host system. Each controller response consists of a header, the command response, and a terminator in the following format:
<Header>Command Response<Terminator>
Note: The following descriptions of header, response, and terminator, use 3M Touch Systems terminal emulator key sequences. The format of controller responses varies depending on the terminal emulation mode you are using.
The header is the first character in the response string and is the ASCII
01.If you are working with an IBM PC compatible system in terminal mode, the SOH control character returns a character to the sensor.
3M Touch Systems, Inc. Proprietary Information – 37531 Rev D
