CET s.r.l. Parallel Message Display
page 17
4.
PROGRAMMING THE DEVICES
All message display units of this series can be programmed exclusively through the serial line using a personal
computer. The message display units must be powered during programming.
4.1. PROGRAMMING USING A PERSONAL COMPUTER
It is necessary to use the special software package named WINTEXT, which, by means of guided logic menus,
allows the generation of all necessary messages.
To execute programme transfer, the serial lines of the personal computer and message display unit should be
connected as shown in the figure.
The PC to display unit cable connection should be done when the display unit is not powered.
Once both devices are connected and powered, the display unit shows the message “PROGRAMMAZIONE
ATTESA” (AWAITING PROGRAMMING); as soon as the transmission starts from the PC, automatically the
display unit changes to the message “RICEZIONE IN CORSO” (RECEPTION IN PROGRESS) and the PC
software starts sending.
Upon transmission completion, the display unit shows the message “RICEZIONE OK” (RECEPTION OK). If
reception was unsuccessful or incomplete, the display shows “RICEZIONE NON OK” (RECEPTION NOT OK). In
this case, check the cable and transmission speed.
N.B. Make sure that the display unit and PC power supplies are unipotential, i.e. have the same grounding
reference (for the display unit this is the external power unit), since potential differences damage the serial ports.
4.2. PROGRAMMED MEMORY ARCHIVES
All text programmes resident in the display units can be resent to a personal computer fitted with the WINTEXT
software, to be filed or changed.
To execute programme transfer, the serial lines of the personal computer and message display unit should be
connected as shown in the figure.
The PC to display unit cable connection should be done when the display unit is not powered.
Gain access to "RICEZIONE" (RECEPTION) in the personal computer; the words “TRASMISSIONE IN CORSO”
(TRANSMISSION IN PROGRESS) automatically appear in the display unit display while the words “RICEZIONE
IN CORSO” (RECEPTION IN PROGRESS) will appear on the PC.
Upon transmission completion, the PC will show the message “RICEZIONE OK” (RECEPTION OK) will appear. If
transmission was unsuccessful or incomplete, the PC shows “RICEZIONE NON OK” (RECEPTION NOT OK). In
this case, check the cable and transmission speed.
N.B. Make sure that the display unit and PC power supplies are unipotential, i.e. have the same grounding
reference (for the display unit this is the external power unit), since potential differences damage the serial ports.
4.3. PC – TO – DISPLAY UNIT CONNECTION
PERSONAL COMPUTER
DB 9-POLE CONNECTOR
TX (3)
RX (2)
GND (5)
DISPLAY UNIT
RJ45 SOCKET
(6) RX
(4) TX
(1) GND
(2) PRG
PERSONAL COMPUTER
DB 25-POLE CONNECTOR
TX (2)
RX (3)
GND (7)
DISPLAY UNIT
RJ45 SOCKET
(6) RX
(4) TX
(1) GND
(2) PRG