14
Digital Chair Scale Operation Manual
5.0
RS-232 Communication
The scale comes with an RS-232 port which enables weight data to be transmitted to other equipment, such as a
computer or printer. The RS-232 cable with DB-9 connector (PN 100719) is available from Rice Lake Weighing
Systems. Figure 3-10 on page 9 shows where the RS-232 connection is.
The RS-232 parameters are 9600 baud (selectable in the programming mode), 8 data bits, 1 stop bit, no parity
and no handshaking.
There are three methods of communication:
•
Pushbutton keypad print
•
Standard remote protocol
•
Escape protocol
5.1
Pushbutton Keypad Print
With a stable, in-range weight, press and hold the
LB/KG/Print
key for at least three seconds, or until the scale
displays “
PRINT.
” Note that if the scale does not beep after five seconds, then release the button as the weight was
either in motion, or out of range.
•
If displaying weight and not BMI, the scale will send out the following 21 character string:
xxxxxxxxx<SP>uu<SP>mmmmm<SP><CR><LF>
Where:
xxxxxxxxx is the weight with decimal point and " - " sign, if negative uu is the unit (Lb or Kg).
mmmmm is the mode (gross or net)
Examples:
-10 Lb net = <SP><SP><SP><SP>-10.0<SP>lb<SP><SP>Net<SP><SP><SP><CR><LF>
10 Lb gross = <SP><SP><SP><SP><SP>-10.0<SP>lb<SP>Gross<SP><CR><LF>
•
In BMI mode (displaying the BMI value), the scale will send out the following data:
GROSS WEIGHT 215.0 LB
TARE WEIGHT
0.0 LB
NET WEIGHT
215.0 LB
PATIENT HEIGHT 6-01.0 FT
PATIENT BMI 28.4
5.2
USB Connection
The Rice Lake 560 Digital Chair scale has the capability of connecting to a PC using a USB connection and a
USB cable (not included). That connection location is shown in Figure 5-1.
USB Connection
RS-232 Connection
load cell
connection
located
under cover
Figure 5-1. USB Connection Port and RS-232 Connection Port (shown with back cover on).
