3.7
RS 232 Serial Port
The scale has a RS232 serial communication port. It is used to connect the scale to a
computer or serial printer to print labels.
3.7.1
Communication with a computer- Terminal Mode
This option allows the scale to be connected to a PC so that with the use of management software it
is possible to control the weighing and print reports and labels. The scale’s communication port has
a configurable speed from 300 bps (bits per second) to 19200 bps. The instrument leaves the
factory set at 9600 bps. A serial cable is required to connect the scale, the weight information is
sent continuously.
The scale continuously transmits a fixed stream of 8 bytes. The data are 8 bits in size.
The stream for Modo Contadora (Counting Mode) is in the format in Figure 1.
0 primeiro byte - 0 first byte
Contadora - counter
Sobrecarga - excess weight
Quantidade negativa - negative quantity
Equilíbrio - equilibrium
Centro de zero - zero center
Modo tara - tare mode
Quantidade (byte + significativo) - quantity (byte + significative)
Quantidade (byte + signifacativo) - quantity (byte + significative)
Retorno de carro - carriage return
Status- status
Fim de frame- end of frame
Figure 1- Stream for Weighing Mode
The weight or the quantity is coded in ASC II with decimal point. The carriage return
character is 0x0D (hexadecimal).
The sending of the stream is interrupted in the case that there is no significance. The excess
weight bit is set when there is excess weight (superior trace) or underweight (inferior traces)
or analogical digital converter exceed (Error 5).
Note: For more details about configuring the serial port, check the general configurations
item.
3.7.2
Printing Labels
The scale offers several label printing options. The serial port just needs to be
configured for such (see general configurations item). There are three printer models
compatible with the scales.
-
Epson LX300 / LX300+ Dot Matrix Printer – Adhesive Label Printing
-
Bematech MP20MI Dot Matrix Printer – Ticket Printing
- Argox OS 214 Thermal Printer – Bar Code Label Printing
For example, a stream transmitted in WEIGHING
MODE is visualized in Hyper Terminal as E1234.5.
