Elo TouchSystems IntelliTouch Ultra, Product Manual, Page: 68 / 105

Hardwar Hardware Troubles e Troubleshooting hooting
57 57
P P2 2 P Piin ns s D DB B2 25 5 D DB B9 9 H Ho os st t S Siig gn na all S So ou urrc ce e
1 1 8 8 1 1 D DC CD D ((N N//C C)) C Co on nttrro olllle err
2 2 6 6 6 6 D DS SR R C Co on nttrro olllle err
3 3 3 3 2 2 R RX XD D C Co on nttrro olllle err
4 4 4 4 7 7 R RT TS S H Ho os stt
5 5 2 2 3 3 T TX XD D H Ho os stt
6 6 5 5 8 8 C CT TS S C Co on nttrro olllle err
7 7 2 20 0 4 4 D DT TR R H Ho os stt
8 8 2 22 2 9 9 R RI I ((N N//C C)) N N//C C
9 9 7 7 5 5 G GN ND D C Co om mm mo on n
1 10 0 K Ke ey y
The controller only requires a 2-wire connection, controller Transmit Data (P2 The controller only requires a 2-wire connection, controller Transmit Data (P2
pin 3) and Signal Ground (P2 pin 9). For two-way communications, the controller
pin 3) and Signal Ground (P2 pin 9). For two-way communications, the controller
Receive Data (P2 pin 5) should also be connected to the host Transmit Data pin.
Receive Data (P2 pin 5) should also be connected to the host Transmit Data pin.
Data Set Ready (DSR) and Clear to Send (CTS) may be used by the host to verify Data Set Ready (DSR) and Clear to Send (CTS) may be used by the host to verify
controller connections and operation. DSR is asserted when power is applied to
controller connections and operation. DSR is asserted when power is applied to
the controller and CTS is asserted when the controller's power-on sequence is
the controller and CTS is asserted when the controller's power-on sequence is
complete. Data Terminal Ready (DTR) and Request to Send (RTS) can also be complete. Data Terminal Ready (DTR) and Request to Send (RTS) can also be
connected for full hardware handshaking. connected for full hardware handshaking.
Elo driver software typically requires two-way communication (unless Elo driver software typically requires two-way communication (unless
ELODEV’s -p- flag is used), and all four handshaking lines.
ELODEV’s -p- flag is used), and all four handshaking lines.
If accessible, the controller's diagnostic LED can verify whether RS-232 data is If accessible, the controller's diagnostic LED can verify whether RS-232 data is
being transmitted.
being transmitted.
Alternatively, a breakout box will tell you if there is any activity on the data line. Alternatively, a breakout box will tell you if there is any activity on the data line.
It is possible that the port you are using on the host computer is meant to work
It is possible that the port you are using on the host computer is meant to work
with an RS-232 DTE device. To check this, install a null modem cable between
with an RS-232 DTE device. To check this, install a null modem cable between
the controller and the host computer's serial port. A null modem cable converts a
the controller and the host computer's serial port. A null modem cable converts a
DCE device into a DTE device by swapping pins 2 and 3 and the handshaking DCE device into a DTE device by swapping pins 2 and 3 and the handshaking
lines. lines.
Some serial ports require jumpers for the handshaking lines on the cable Some serial ports require jumpers for the handshaking lines on the cable
connector at the computer end. The jumper combinations that may be required to
connector at the computer end. The jumper combinations that may be required to
make an RS-232 port work are beyond the scope of this manual. Consult your
make an RS-232 port work are beyond the scope of this manual. Consult your
computer manual for more information.
computer manual for more information.
If a breakout box is not available, you can measure the DC voltage at the data If a breakout box is not available, you can measure the DC voltage at the data
output of the controller (RXD on the host). It should measure between
output of the controller (RXD on the host). It should measure between
8 and 10 Vdc when the touchscreen is not touched, and drop several volts
8 and 10 Vdc when the touchscreen is not touched, and drop several volts
(towards 0) during a touch, depending on the data format and the baud rate.
(towards 0) during a touch, depending on the data format and the baud rate.
If proper RS-232 signal voltage is not present, the controller may not have power If proper RS-232 signal voltage is not present, the controller may not have power
applied. applied.