Rs 232/Rs 485 Communication Description; Communication Format; Communication Protocol - Agilent Technologies TV70 Navigator Bedienungshandbuch

RS 232/RS 485 Communication Description

Both the RS 232 and the RS 485 interfaces are available on the
connector J6. The communication protocol is the same (see the
structure below), but only the RS 485 manages the address field.
Therefore to enable the RS 485 is necessary to select the type of
communication as well as the device address by means of the
software.

Communication Format

Communication Protocol

The communication protocol is a MASTER/SLAVE type where:
The communication is performed in the following way:
1.
(SLAVE);
2.
The MESSAGE is a string with the following format:
<STX>+<ADDR>+<WIN>+<COM>+<DATA>+<ETX>+<CRC>
where:
Controller TV70 Navigator User Manual / 87-900-956-01 (G)
8 data bit
no parity
1 stop bit
baud rate: 600/1200/2400/4800/9600 programmable
Host = MASTER
Controller = SLAVE
the host (MASTER) send a MESSAGE + CRC to the controller
the controller answer with an ANSWER + CRC to the host.

RS 232/RS 485 Communication Description

Technical Information
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