Ticket Print ing Sup pres sion
2 .4 .3 .28 AC+/- Print
AcPr A
The GS8920 may be setup to create a ticket printout in response to a AC+ or AC- command on its
front mounted printer and its serial output or to create the ticket printout on one or the other of these or
on none of these. This facility is particularly useful in high volume and high speed applications where
large volumes of ticket printouts are a disadvantage. Adjustable
A
for all,
S
for serial only,
F
for front
mounted printer only and
n
for none.
When to Print :-
2 .4 .3 .29 Automatic Print.
AP On.1
When automatic print is
OFF
, the GS8920 will go into error 7 on any print command which uses the
current weight from the indicator if that weight is in motion. When automatic print is
On.1
, the
GS8920 will store the print command. It will then await the first weight data from the indicator which
is not in motion and will then print a ticket. If the selection is
On.2
, then the GS8920 will either await
data from the indicator that is not in motion if the weight was in motion on the print command OR will
await an in motion data set and then await a not in motion data set if the indicator is not in motion on
the print command. The weight data sent to the GS8920 Ticket Printer by the digital weight indicator
includes a motion flag which signifies that the weight on the scale is STILL (not in motion) or is NOT
STILL (in motion). Refer to the weight indicator’s manual for full details of the STILL condition and
its settings. Adjustable
OFF, On.1
or
On.2
2 .4 .3 .30 Remote Print
rP On
The GS8920 will print a ticket in response to the operation of the
key on all Gedge Systems
and Toledo Indicators. This facility can be turned OFF via this parameter. The OFF selection is
recommended for Toledo indicators. Adjustable
On
or
OFF
.
2 .5 Con necting the GS8920 to Dig i tal Weight In di ca tors.
2 .5 .1 Serial Data Input.
The GS8920 Ticket Printer may ONLY be connected to Gedge Systems digital weight indicators and
certain other popular digital weight indicator brands. The weight indicator must be fitted with a
RS-232C or 20mA Active current loop serial output. In the case of a Gedge Systems indicator this may
be an Option 02 RS-232C Output or an Option 05 Current Loop Output. The GS8920’s serial input
connector has different pins for the 20mA Current Loop and EIA RS-232C inputs. The 20mA input to
the GS8920 must be active as the GS8920’s 20mA input is passive. The GS8920 Ticket Printer
automatically
detects the weight indicator’s serial transmission type and internally selects the correct
input pin on its serial input connector. In addition, the GS8920 completely
automatically
determines
the indicator’s data transmission rate and parity setting and sets itself to receive data at these settings.
The GS8920 automatically interrogates its serial input at 2 second intervals as well as obtaining a new
weight reading immediately following operation of a function key.
The GS8920’s serial output occurs at the same baud rate and parity setting as the data received from
the weight indicator. Therefore, if a remote printer is connected to the GS8920 Ticket Printer the serial
data rate settings used on the weight indicator and the parity setting should be the same as those
required by the remote printer.
2 .5 .1 .1 Connecting the GS8920 to Several Weight Indicators.
The GS8920 Intelligent Ticket Printer may be connected to a virtually unlimited number of weight
indicators via a simple switch which would be used to switch the serial output of many indicators into
the GS8920’s serial input. While it is possible for the indicators to have different serial outputs as well
as different baud rates and parity settings, the switching process would progress most smoothly if all
the indicators had the same type of serial output as well as the same baud rate and parity setting. The
type of switch proposed here creates a greatly corrupted serial transmission as the switching can occur
within a data byte as well as within a data string. Furthermore, even on a null line, spikes can occur
during switching which create spurious serial inputs.
GS8920 Intelligent Ticket Printer.
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