Operation Manual

Product Reference Guide 169
Chapter 6
Message Formatting
Standard Message Formatting
The system always provides scanner to host data communication using the following
message formatting:
For PowerScan™ M8500 models with display,
if the RS-232 interface is selected for
communication between the Host and the BC-80X0 cradle, then the following additional
communications between
Host and Scanner can occur:
• The Host can send messages to any scanner associated with that cradle to con
trol the
Scanner’s display, LEDs and beeper.
• The Scanner can send up to 3 user-defined characters to the Host using the 3 com-
mand keys on the Scanner.
Messages from Host to Reader
The general format to enable the Scanner for a two-way communication is:
[Scanner_Addr] [Scanner_Addr_delimiter] MESSAGE [CR]
The format for other asynchronous messages is:
[Scanner_Addr] [Scanner_Addr_delimiter] [DC2]
MESSAGE
[CR]
where DC2 is ASCII 0x12 (^R) character.
Output Message from
PowerScan™ M8500 or standard PowerScan™
M8500 Stand-alone Towards Host
[Header] [Scanner_Addr] [Scanner_Addr_delimiter] [Cradle_Addr] [Cradle_Addr_delimiter]
[Time stamp] [Ts_delimiter] [Code ID] [Code Length]
CODE
[Terminator]
[Items in square brackets are optional.]
Output Message from
PowerScan™ M8500 STAR-System™ Towards Host
[Time stamp] [Ts_delimiter] [Header] [Code ID] [Code Length] CODE [Terminator]
[Items in square brackets are optional.]
If you have enabled the Scanner Address Stamping or the Scanner Address
Delimiter, you
must specify them in every message.