Programming Protocol - Symbol LS 1220 Product Reference Manual

Programming Protocol

This section discusses programming via the host computer. Refer to Parameter
Descriptions on page 8-3 for an explanation of the parameters.
Regardless of whether or not ACK/NAK is enabled, the ACK/NAK protocol is used for the
programming sequences that occur between the host and the scanner.
Except for the turn laser off command, all commands have the following format:
STX S T I [x] <Data> ETX LRC
where:
STX =
S =
T =
I =
[x] =
<Data> =
ETX=
LRC =
02h (Start of Transmission)
53h (ASCII value of S)
54h (ASCII value of T)
49h (ASCII value of I)
character:
D 44h Identify software
E 45h Turn laser on
F 46h Upload all parameters
G 47h Download all parameters
H 48h Download specific parameters
30h + upper nibble of parameter 30h + lower nibble of parameter
03h
Exclusive-or of all characters transmitted except for the STX character.
Programming
8-21