Manual page 14
SERIAL PORT INFORMATION
FULL DUPLEX MODE
The Full Duplex Mode provides a Demand serial transmission mode and is selected by setting A3 to “d” and A6 to “0”. The Demand mode
allows control from a host device, usually a PC, and can be activated by pressing the PRINT key on the indicator’s front panel. Figure B-1
shows a suggested cable diagram for interface to a PC. Figure B-2 shows the serial data format for the Demand Mode.
INDICATOR
PC
2 RXD
RXD 2
TXD 3
S. GND 5
3 TXD
5 S. GND
6 DSR
4 DTR
8 CTS
DSUB9
DSUB9
FIGURE B-1. Cable Diagram for Indicator to IBM PC
<STX> <POL> xxxxx.xx
<LB/KG>
<GR/NT> <CR> <LF>
Polarity:
<SP> = Positive
"–" = Negative
Weight Data
Units:
lb = pound
kg = kilogram
Gross/Net:
GR = Gross
NT = Net
Start
Transmission
Carriage
Return
Line
Feed
<SP>
<SP>
Space
Space
pc = pieces
cu = cusotm unit
FIGURE B-2. Consolidated Controls Demand Mode
RECOGNIZED HOST COMMANDS
“P”
- This command is sent to the indicator to print the indicated display. The indicator will not respond if the scale is in motion,
positive overload or negative overload.
“Z”
- This command is sent to the indicator to zero the scale. The indicator will not respond if the scale is in motion, positive
overload or negative overload. The indicator will also not respond if it is not in gross mode or within the zero range specified in
F4 of the Setup Menu.
“T”
- This command is sent to the indicator to tare the scale. The indicator will not respond if the scale is in motion, positive overload
or negative overload. The indicator will also not respond if it displaying a negative gross value.
“G”
- This command is sent to the indicator to revert to gross mode. The indicator will not respond if the scale is in motion, positive
overload or negative overload. The indicator will also not respond if it is not in net mode.
“N”
- This command is sent to the indicator to revert to net. The indicator will not respond if the scale is in motion, positive overload
or negative overload. The indicator will also not respond if it is not in gross mode or a tare has yet to be established.
“C”
- This command is sent to the indicator to toggle among the configured units.
