Rice Lake IQ plus 800 Installation & Operation Manual page 21

NOTE:
The EDP port supports
bidirectional serial
communications.
NOTE:
Continuous outputs are not
recommended for half-duplex,
master/slave RS-485 network
configurations.
®
2-10 IQ plus 800/810 Installation Manual
For example, with demand outputs, or in response to a KPRINT
command, the protocol is:
<STX> <ADDRESS> <DEMAND DATA> <ETX> <CR>
ASCII 02
Response commands from
decimal
indicator:
character
<first line> <EOL>
<additional lines> <EOL>
<last line> <EOL>
Address of the transmitting
EOL = <CR> or <CR> <LF> as set
IQ plus 810 indicator.
by SERIAL
parameter in setup mode.
For example, suppose you wish to send the remote print command,
KPRINT, from an ASCII terminal to an indicator on the RS-485
network. Assume the indicator's address is ASCII decimal character 65.
After consulting an ASCII chart, you determine that the keyboard
equivalent for the STX character (02) is CONTROL-B. The address
(65) corresponds to the capital letter "A" and the CR character is
ENTER. Therefore, from the terminal you press: CONTROL-B, A, K,
P, R, I, N, T, ENTER.
The indicator responds with:
<STX> A SCALE #1
GROSS 1699 LB
04/20/94 10:05 AM
<ETX> <CR>
If the indicator is configured for continuous outputs, the protocol is:
<STX> <ADDRESS> <STREAM DATA> <ETX> <CR>
ASCII 02
Response commands from
decimal
indicator:
character
<STX> <POL> <wwwwwww>
<L/K> <G/N> <S> <EOL>
NOTE – This is the Consolidated
Address of the transmitting
Controls continuous data format.
IQ plus 810 indicator.
ASCII 03
decimal
EDP TERMIN
character
<EOL>
<EOL>
<EOL>
ASCII 13
decimal
character
ASCII 03
decimal
character
ASCII 13
decimal
character