User's Manual

© Adam Equipment Company 2011
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3.10 RS-232 INTERFACE
The AZextra scales include a bi-directional RS-232 interface. When connected
to a printer or computer, the scale outputs the weighing results using the RS-
232 interface. The scale can be controlled sending commands from a PC.
See section 3.10.1.
Specifications:
Connector:
3.10.1 Input commands format
The scale can be controlled with the following commands. The commands
must be sent in upper case letters, i.e. “T” not “t”.
T<cr><lf> Tares the scale to display the net weight. This is the same
as pressing [Tare] key.
Z<cr><If> Sets the zero point for all subsequent weighing. The
display shows zero.
P<cr><lf> Prints the results to a PC or printer using the RS-232
interface.
3.10.2 RS-232 Setup
The RS-232 interface uses parameters set by the user for language, currency
symbol, baud rate, date format and label format of the printout. Press and
hold the [Print] key for 4 seconds to access the parameters. Press [Print] to
scroll through the options and [Tare] to confirm the change and then advance
to the next parameter. When a parameter is entered by pressing [Tare], the
RS-232 output of weighing data
ASCII code
Adjustable Baud rate, 600, 1200, 2400, 4800, 9600 and 19200 baud
8 data bits
No Parity
9 pin D-subminiature socket
Pin 3 Output
Pin 2 Input
Pin 5 Signal Ground