Owner`s manual
SERIAL AND USB DEVICE PORT COMMANDS 
The following commands and formats apply to both the Serial port and the USB Device port.
Both the Serial port and USB Device port on the 758C are bi-directional ports and can receive 
and transmit data. However, the USB Device port can only communicate with a computer. 
The Serial port can output to a printer as well as communicate to a computer. 
Serial Port 
Using the serial port, it is possible to control the printing operation of the 758C by 
transmitting commands to the indicator. Note that the 
PPORT
 parameter in the indicator 
must be set to 1 = Serial Port to allow this. 
USB Device Port 
In order for the computer to communicate to the indicator using the USB Device port, the 
computer requires the USB driver (758C_USB_Driver.inf, available on the Detecto Dealer 
Web Site) and the 
PPORT
 parameter on the indicator must be set to 3 = USB Device Port. 
Remote Print Command 
The host device (computer) sends: 
<LF> P <CR> 
This command is equivalent to pressing the PRINT/ENTER key on the 758C keypad. The 
758C will respond by printing a ticket using the serial port (or transmit data using the USB 
Device port). The ticket will be printed (or data transmitted) in the following format: 
If Pounds Only or Pounds/Kilograms 
was selected for 
Unit=
If Kilograms Only, Kilograms/Pounds or Stones 
and Pounds/Kilograms was selected for 
Unit=
Time, mm/dd/yy  Time, dd/mm/yy 
ID: xxxxxxxxxxx ID: xxxxxxxxxxx
BMI: xx.x BMI: xx.x
Height: x' xx.x”  Height: xx.x cm 
Weight: xxx.xuu G  Weight: xxx.xuu G 
xxx.xuu T xxx.xuu PT
xxx.xuu N xxx.xuu N
Journal Mode Print Command 
The host device (computer) sends: 
<LF> J <CR> 
This command is equivalent to pressing the PRINT/ENTER key on the 758C keypad. The 
758C will respond by printing a ticket using the serial port (or transmit data using the USB 
Device port). The ticket will be printed (or data transmitted) in the following format: 
Weight, BMI, Height, Time, Date 
NOTE: This command is equivalent to pressing the PRINT/ENTER key on the 758C 
keypad with the P220 Serial Format Disabled and CRLF Enabled (
P220=0
), and the 
CRLF set for Serial Format for P185 Journal Mode (
Crlf=0
) parameters selected. Note 
that this command will print a ticket (or transmit data) in the above format regardless of 
how the 
P220=
 and 
CrLF=
 parameters are set. 
IMPORTANT! If ID or BMI are disabled, the field will be left out on any three formats. 
8555-M210-O1 Rev R y 758C Owner’s 
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