Rice Lake 880 Technical And Service Manual page 89

If the initiating device address matches the port address of a 880 on the RS-485 network, that indicator responds.
The responding indicator uses the format shown in Figure 9-3:
<STX>
ASCII 02
decimal
transmitting indicator
• Communication with an RS-485 880 is command / response only. An 880 configured for RS-485 cannot print a
ticket or stream continuous data.
• Any valid EDP command can be sent to the 880 when in RS-485 mode.
• If a command is unrecognized or cannot be executed, the 880 responds with ?? wrapped in the RS-485
protocol. For example: <STX><ADDRESS>??<ETX><CR>
• Depending on the command, the <RESPONSE> may include its own termination characters that are sent
before the <ETX><CR>, see the example for the XG command shown below.
• A multi-line response, for example from a DUMPALL command, is wrapped in the header and footer as a total
but each individual line is not.
<STX><ADDRESS><first line> <EOL>
<additional lines> <EOL>
<last line> <EOL><ETX><CR>
Where:
EOL - <CR> or <CR><LF> (set by the TERMIN parameter for the port)
To send the XG#1 command from an ASCII terminal to an indicator at address 65 (decimal) on the
Example:
RS-485 network, use the format shown in Figure 9-2.
• The keyboard equivalent for the start-of-text (
• The indicator address (65) is represented by an upper case "A".
• The carriage return (CR) character is generated by pressing the
Therefore, to send the XG#1 command to the indicator at address 65, enter the following at the terminal:
<C -B>AXG#1<CR>
ONTROL
The indicator will respond with <STX>A 1234.00 lb<CR><LF><ETX><CR>, gross weight and units. See
Section 6.0, for other commands that can be used.
<ADDRESS>
Response commands from
indicator:
Address of the
where EOL = <CR> or <CR><LF>
(set by TERMIN parameter on the
SERIAL menu)
Figure 9-3. RS-485 Respond Data Format
<RESPONSE>
<first line><EOL>
<additional lines><EOL>
<last line><EOL>
) character is
STX CONTROL-B
ENTER
<ETX> <CR>
ASCII 13
decimal
ASCII 3 decimal
(see Table 9-9 on page 90).
key.
Appendix 83