Agilent Technologies X3501-64003, Руководство пользователя

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Technical Information
RS 232/RS 485 Communication Description
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Turbo-V 1001 Rack Controller User Manual / 87-901-033-01 233/288
Communication Format

8 data bit

no parity

1 stop bit

baud rate: 600 / 1200 / 2400 / 4800 / 9600 / 19200 / 38400
programmable (default setting: 9600)
Communication Protocol
The communication protocol is a MASTER/SLAVE type where:

Host = MASTER

Controller = SLAVE
The communication is performed in the following way:

the host (MASTER) send a m CRC to the controller
(SLAVE);

the controller answer with an CRC to the host.
The
MESSAGE
is a string with the following format:
<STX>+<ADDR>+<WIN>+<COM>+<DATA>+<ETX>+<CRC>
where:
NOTE
When a data is indicated between two quotes (‘...’) it means that the indicated data is
the corresponding ASCII character.

<STX>
(Start of transmission) = 0x02

<ADDR>
(Unit address) = 0x80 (for RS 232)
<ADDR>
(Unit address) = 0x80 + device number (0 to 31) (for RS
485)

<WIN>
(Window) = a string of 3 numeric character indicating the
window number (from ‘000’ to ‘999’); for the meaning of each
window see the relevant paragraph.