21 Network Commands
21.1 Basic Command Set
The C500 series supports two levels of networking, Basic and Extended. The Basic level allows for simple weight
acquisition by PLC or computer from a number of C500s on a simple RS232 or RS422 network. The extended
network language allows for full control over all functions of the instrument. The section here describes only
the basic command structure. For the Extended structure refer to Section 21.2.
The indicator may be set to respond to commands sent via the serial port from a PLC or PC. The command
structure is:
STX K Command Poll ETX
where:
STX (1 byte): 02
H
K (1 byte): 4B
H
Command (1 byte): 1 character command (defined below)
Poll (2 bytes): the network address (set in SERIAL:NET.OPT:ADDRESS). 00 is the broadcast address
ETX (1 byte): 03
H
Command Description
z Zero key press
Z Zero key long press
T, t Tare key press
G, g Gross/net key press
P, q Print key press
Q Print key long press
p Print. This triggers the transmission of the current weight using the auto output format set in
SERIAL:AUT.OPT:TYPE to the port that sent the command. Use the ‘P’ command to trigger a
normal printout to the configured printer port.
S, s Show total
C, c Clear total
U, u Undo last print
1, 2, 3, 4 Single transmit on serial ports configured as SINGLE. See Section 17.7 for assignment.
H, h Hold key press
e Peak hold key press
E Peak hold long key press
f Livestock hold key press
F Livestock hold long key press
21.1.1 Examples
To zero the scale of unit 1, send: STX Kz01 ETX
To print, send: STX KP01 ETX
21.2 Extended Command Set: Overview
21.2.1 Command
Commands consist of three ASCII-characters (e.g. ADR).
119 C500-600-2.0.3
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