May
2015
WorkHorse H-ADCP Operation Manual
Page 86
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Check the I/O Cable
This test will check the communication between the computer and H-ADCP.
To check the cable:
1. Disconnect both ends of the cable and measure the continuity using a DMM (see
for the wiring diagram). Correct any problems found.
2. Reconnect the I/O cable to host computer.
3. Load BBTalk on your computer. Select the proper communications port (see the RDI Tools User’s
Guide
for help on using BBTalk).
4. For RS-232 communications, short pins 1 and 2 together on the female 7-pin connector that was
plugged into the H-ADCP (see
). If you are using RS-422, connect a jumper be-
tween pin 2 to pin 6 and another jumper between pins 1 to pin 5 of the underwater connector at
the H-ADCP end of the cable.
5. Type any characters on the keyboard. The keys you type should be echoed on the screen. If you see
characters, but not correctly (garbage), the cable may be too long for the baud rate. Try a lower
baud rate. If this works disconnect the jumper on pins 1 and 2 and then push any keys on the key-
board. You should NOT see anything you type.
6. If the keys are echoed correctly on the screen, the computer and the communication cable are
good. Re-connect the I/O cable to the H-ADCP. The above loop-back test does not show if trans-
mit and receive pairs are interchanged. Thus, it is important that you check the wiring diagrams
provided in
A loop-back test does not show if transmit and receive wires or pairs are interchanged, even
though characters may be displayed correctly.
7. If the keys are echoed correctly on the screen, the computer and the communication cable are
most likely good. Re-connect the serial cable to the Deck Box. If the H-ADCP still does not
wakeup, there could still be a problem with the Deck Box or H-ADCP.
H-ADCP Checks
Once you have eliminated possible problems with the power, I/O cable, communications settings, and the
computer, that leaves the H-ADCP as the source of the problem. The following checks may help in some
situations.
To Cold Start the H-ADCP:
1. Remove the housing to gain access to the PC boards.
2. Remove all power to the H-ADCP.
Disconnect the power cables P1 and P2 on the PIO board to ensure that NO POWER is applied
to the H-ADCP during the next step.
3. Short TP10 to TP11 on the PIO board for 10 seconds.
4. Remove the jumper.
5. Connect the computer and connect power to the H-ADCP. Send a break to the H-ADCP. This
should start the H-ADCP in the “cold start” mode.