Communication Protocol - Agilent Technologies TV 1001 SEM Notice De Mode D'emploi

17 Technical Information
RS 232/RS 485 Communication Description
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Communication Protocol

The communication protocol is a MASTER/SLAVE type where:
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The communication is performed in the following way:
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The MESSAGE is a string with the following format:
<STX>+<ADDR>+<WIN>+<COM>+<DATA>+<ETX>+<CRC>
where:
When a data is indicated between two quotes ('...') it means that the indicated
NOTE
data is the corresponding ASCII character.
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262/296
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 (SLAVE);
the controller answer with an ANSWER + CRC to the host.
<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.
<COM> (Command) = 0x30 to read the window, 0x31 to write into the
window
<DATA> = an alphanumeric ASCII string with the data to be written into
the window. In case of a reading command this field is not present. The
field length is variable according to the data type as per the following
table:
TV 1001 SEM User Manual / 87-900-973-01 (H)