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When a data is indicated between two quotes ('...') it means that the indicated
NOTE
data is the corresponding ASCII character.
The field length is variable according to the data type as per the following
table:
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.
TV 1001 Navigator User Manual / 87-900-945-01(L)
<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 char-acter 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
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.
RS 232/RS 485 Communication Description
Valid characters
'0' = OFF
'1' = ON
'-', '.', '0' . . . '9' right
justified with '0'
from blank to '_' (ASCII)
Technical Information
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