Symbol Technologies VRC 6940 - Manual (Page 31)

4-2
VRC 6940 Product Reference Guide
Transferring and Installing Application Programs
This section describes how to transfer a HEX image from a Host PC onto a VRC 6940
terminal over a standard RS-232 null modem cable. The procedure uses the SENDHEX or
WINHEX program on the Host PC and the Program Loader utility on the VRC 6940.
The Program Loader installs the HEX image by converting the ASCII data stream into files
that are stored in non-volatile memory (NVM) on the terminal (the application EEPROM).
Any further installation procedures depend on the contents of the HEX file.
To transfer non-HEX images or files, use the TFT3000 program on the Host PC, and the
TDREM utility on the terminal. For details on all of these programs, refer to the Series 3000
Application Programmer’s Reference Manual (p/n 70-16309-XX).
Figure 4-1. Cabling for Downloading on Benchtop
1. Prepare the PC for Communications and File Downloading
To prepare the PC for communications:
1. Begin with the VRC 6940 terminal in suspend mode.
2. Remove the plug cover from the RS-232 serial port on the terminal, and attach the
male connector end of the null modem cable.
3. Attach the female end of the null modem cable to the Host PC serial port, as shown
in Figure 4-1 . Use an adapter, if necessary.
4. On the PC, start the communications program. For example, to use SENDHEX, first
open a DOS window. Then type the SENDHEX command with appropriate
To the serial port
VRC 6940 RS-232
serial port
Null modem cable
Laptop Computer