Rice Lake SURVIVOR CW-80 Operating Manual page 6

8. Remote Serial Commands
Overview
The EDP (Electronic Data Processing) port allows you
to transfer important weigh-process data to printers or
computers.
The CW-80 Checkweigher uses either bidirectional
RS-232 or simplex (output only) 20 mA current loop
communications as its standard communications
interface. All characters are standard ASCII charac-
ters.
Optionally, an RS-485 communications package is
available to provide networking capability of up to 32
devices (i.e., CW-80s, printers, and computers). Each
can be individually addressed.
RS-485
By using special commands from either a terminal
keyboard or a specially-designed computer program,
you can manipulate Over/Under/Tare and Units
values, call up current settings for Tare/Tolerance sets,
and perform reporting functions. Also, you can use
special commands to transmit weight data directly
from the CW-80's EDP port on demand.
When you send a command via the EDP port, the
command must be in a specific format. Generally, you
type the command on the remote keyboard and press
ENTER or RETURN to send it in the formats shown.
This section describes four different command
categories for implementing CW-80 EDP (serial)
communications:
•
Simple Commands (No Response)
•
Inquiry Commands (Response)
•
ID Reference Commands
•
Read ID and Write to ID Commands
Each command category in this section includes a
description of the related format.
Note:
Commands sent to CW-80 address 0 are broadcast
commands. All CW-80s in the network interpret and act
upon the particular command. No REPLY acknowledge
character string is to be transmitted to indicate receipt
of a command, since serial port bus contention will
likely occur.
CW-80 Supervisor's Operating Guide 15