Nova-Tech PW Series - Manual (Page 27)

Page 27 of 48
© Adam Equipment Company 2007
Unstable readings
Improper calibration weights being used
Large shifts of zero from the factory settings
When an error is found a displayed message will be shown and the
calibration must be done again. If the balance has error messages more than
once it is possible the mechanics have been damaged.
11.0 RS-232 INTERFACE
The balances have the ability to send or receive data over the serial interface.
The weighing data can be sent over the interface either automatically or when
the user presses the
[Print] key.
The user has control over what data is to be printed.
The following gives a description of the RS-232 interface.
HARDWARE
The RS-232 interface is a simple 3 wire connection. The input and output
connections are:
Connector: 9 pin D-sub miniature socket
Pin 2 input to balance RXD
Pin 3 output from balance TXD
Pin 5 Signal ground GND
Handshaking is not applied.
Baud rate: 4800, 9600, 19200, 38400
Parity:
NONE (= 8N1), EVEN (=7E1) or ODD (=7 O 1)
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 “123.4567 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 TEXT PRINTED
ID number ID no.: xxxxxxxxxxxx
Serial number Serial no. xxxxxxxxxxxx