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(2) Send format [controller (PC) VTR]
Data format
[STX] [command] [:] [data] [ETX]
02h XX XX XX 3Ah XX-XX 03h
(ASCII code: symbols, numbers, upper-case
letters)
20h<XX<7Fh
• [command]
:Command identifier; a 3-byte identifier (ASCII code: symbols, numbers,
upper-case letters) is sent as the command.
•[:]
:This code serves as a delimiter between the command and data.
• [data]
:Data (ASCII code: symbols, numbers, upper-case letters) can be added in
the number of bytes required.
Outline of send procedure from controller
1. The send command starts with STX (start of text = 02h). The command is then identified
by COMMAND which follows and the data is added as required.
The format ends with ETX (end of text = 03h).
2. When a different command is to be sent, a response is awaited from the VTR, and then
the command is sent. (See page E-9)
3. If STX is sent again before ETX is sent, the receive data buffer inside the VTR is cleared.
A command error is returned to the controller, and the data is newly processed with STX
which was received again at the head.
–E-8–