Rs-232 Interface; Hardware - Symmetry 124 User Manual

RS-232 INTERFACE

11
The balances have the ability to send or receive data over the serial interfaces, RS232 and
USB. Both interfaces are controlled by the following parameters. An additional interface is
available to operate with the Remote Display unit.
The USB and RS232 are general purpose serial ports so that the weighing data can be
sent over the interface either automatically or when the user presses the [Print] key.

11.1 HARDWARE

The RS-232 interface is a simple 3 wire connection. The input and output connections are:
Connector:
Pin 2 input to balance RXD
Pin 3 output from balance TXD
Pin 5 Signal ground GND
Handshaking is not applied.
Baud rate:
Parity:
All lines are terminated with carriage return and line feed (<CR><LF>).
In continuous output mode, or if single-line output on demand is selected, the serial output
format will be a single line in the form "1234.567 g<CR><LF>".
The format of the single-line output will change depending on the mode in which the
balance is operating, as described below.
If output on demand is selected, the user may optionally configure the serial output as a
choice of 3 styles of form, either in a default format or in one of two custom formats. Each
of the custom formats can be configured to output up to 15 lines of data. The data types
that can be printed are:
NAME
ID number
Serial number
Date
Time
Net weight
Gross weight
Tare weight
Unit weight
Count
Reference weight
Percent
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TEXT PRINTED
ID no.: xxxxxxxxxxxx
Serial no. xxxxxxxxxxxx
DATE dd/mm/yyyy
TIME hh:mm:ss
Net: xxx.xxx g
Gross: xxx.xxx g
Tare: xxx.xxx g
Unit wt: xxx.xxx g
Count: xxxx pcs
Ref. wt: xxx.xxx g
Percent: xx.xxx %
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