Agilent Technologies TV 551 Navigator Bedienungshandbuch Seite 260

17 Technical Information
How to Connect the Open-Collector Inputs of the Controller
When a data is indicated between two quotes ('...') it means that the indicated
NOTE
data is the corresponding ASCII character.
Tab. 6
Data type
Logic (L)
Numeric (N)
Alphanumeric (A)
The addressed SLAVE will respond with an ANSWER whose structure
depends from the MESSAGE type.
When the MESSAGE is a reading command, the SLAVE will respond
transmitting a string with the same structure of the MESSAGE.
260/300
<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:
Field length
1
6
10
<ETX> (End of transmission) = 0x03
<CRC> = XOR of all characters subsequent to <STX> and
including the <ETX> terminator. The value is hexadecimal coded
and indicated by two ASCII character.
TV 551/701 Navigator User Manual / 87-900-934-01
Valid characters
'0' = off
'1' = on
'-', '.', '0' . . . '9' right
justified with '0'
from blank to '_' (ASCII)
(M)