Tascam RS-232C HD-R1 - Manual (Page 3)

3 TEAC Corporation
Controlled device (this unit) Control device
3. Command format
3.1 Command format overview
The serial protocol was designed to be able to function using common terminal programs. Therefore, all markers are
printable 8-bit ASCII characters, and the end of line marker is flexible. Unless otherwise indicated, character strings
are not case sensitive. Every message has the same structure as indicated below, but some messages do not contain all
the fields defined below.
Parameter ID: A string of 1–24 characters specifies the parameter handled, including queries. Spaces before and
after parameter character strings are ignored. Unless otherwise indicated, character strings are not case sensitive, and
do not contain equal signs, question marks or exclamation points.
Command: One character defines what the command does. This is the same for queries.
Commands include “=” (set value) and “?” (query).
Value: Strings are of 1 to 24 characters, including query values. Spaces before and after character strings are ignored.
Unless otherwise indicated, character strings do not distinguish between upper and lower case characters.
End Marker: One or two character strings. Both a carriage return followed by a line-feed (CR LF) and a line-feed
(LF) are valid. The HD-R1 always accepts either type of end marker, and it can also send them.
Below is an example of a typical message. There are no blank spaces inserted after the Parameter ID and Value
character strings, and one end marker character string is used.