A .3 .4 Note on Changeing and Clearing a Tare Register.
A tare weight which is automatically entered into a tare register during a “weigh in” operation
CANNOT be changed via the keyboard. It can however be recalled and displayed. It will be printed in
a “tare print” list and identified by a “w” beside the tare register number. Only a tare weight which has
been entered via a “weigh in” operation can be used for a “weigh out” operation. Tare registers are
only locked out from normal key tare entry access WHILE they contain a “weigh in” weight. After
they are cleared during the “weigh out” process they are available for normal key tare entry operation.
A printed list can be obtained of the tare weights in ALL of the 50 tare registers.
To clarify clearing a Tare Register:-
1
. If the printed list of tare values shows a “w” beside a tare register it cannot be cleared using the
GS8920’s keybaord. The GS8920 has used it to save a weight value during a WEIGH IN operation and
it can ONLY BE CLEARED by using it for a WEIGH OUT operation.
2.
Tare registers printed without a “w” beside them can be cleared using the GS8920’s keyboard BUT
NOTE, this will only be possible if the GS8920 has been setup on installation to allow keyboard tare
entry. If you are unable to clear a tare register you should check the setting of the Tare Entry parameter
shown on page 2.8 of thios manual.
See page 1-21 for instructions on how to clear a tare register.
A .4 Weight Data In put to the GS8920.
The GS8920 Ticket Printer receives weight information from the indicator to which it is connected. It
may be connected to any
GS
digital weight indicator fitted with an RS-232C or 20mA Current Loop
serial output Option 02, Option 202 or Option 05. In addition, the GS8920 Ticket Printer may be
connected to a number of other popular digital weight indicators which include those manufactured by
Toledo and by A&D. The INSTALLATION section of this manul contains information concerning
weight indicators and their connection to the GS8920. See Chapter 2 page 2.8 onwards.
A .4 .1 Signal type, Baud Rate and Parity.
The digital weight indicator to which the GS8920 Ticket Printer is connected will continuously send
data in a serial form to the GS8920 Ticket Printer.
The GS8920 contains separate input pins on the serial input connector for RS - 232C and 20mA signal
levels as these levels are typically not compatible.
The data transfer rate is set on the serial output board which is installed in the digital weight indicator.
The data rate may be in the range of 600 to 19200 bits per second (baud), and, depending upon the
indicator, the data may be sent with odd, even or no parity.
The GS8920 Ticket Printer need only be told, on installation, to which brand of weight indicator it is
connected.
After this, the GS8920 Ticket Printer reduces the complexity of installation by completely and
automatically detecting the weight indicators transmission characteristics and setting itself up to receive
them. The GS8920 completely automatically determines if the transmission is RS - 232C or 20mA
Current Loop as well as the baud rate and parity setting. While it is doing this the GS8920 displays
messages to enable the user to verify the serial input characteristics.
The GS8920 re - verifies the serial input whenever power is re - applied, whenever a serial input error
occurs and automatically at a minimum interval of every 2 seconds as well as immediately a new
weight input is required.
The transmission characteristics of the weight indicator may be changed at any time and the GS8920
left to adjust itself to the new settings of baud rate and parity !
GS8920 Intelligent Ticket Printer.
A-9
