Daktronics RS-422 Communication - Manual (Page 18)

RS-422 Communication Manual 12
5. If the Transmit LED on the signal converter flickers, the signal is getting to
the signal converter. That means that the correct Com port is being used.
However, if it does not flicker, either a software or hardware problem has
occurred with the computer.
6. If the same message appears in the Received box as in the Sent box, the
loop-back test was successful, implying that the cable is good to that point.
7. If No Response appears in the Received box, the test failed due to one of the
following problems:
a. An incorrect computer COM port is being used or the USB port is not
configured as a “serial” port. (If the Transmit LED flickered, this was
not the problem.)
b. Communication problem: The wire or the terminations are bad.
c. A problem occurred while conducting the test:
• The serial cable to the signal converter is bad or not plugged in.
• The signal converter is not plugged in.
8. If the message says It appears as if this port has a modem attached, the
modem will need to be moved or a different COM port should be used.
After the test is complete:
1. Remove the wire jumpers and make sure terminations are correct.
2. Run the test again, without the jumpers, and the test should fail.
3. Use Venus 1500 Display Manager to get status to ensure communication
now works correctly.
8B
Replacement Parts List
The following table contains some of the items that may need to be replaced over a period of
time. Many of the parts have their part numbers on labels affixed to them.
To prevent theft, Daktronics recommends purchasing a lockable cabinet to store manuals and
replacement/spare parts.
Part Description Part Number
Signal Converter RS-232/RS-422 0A-1127-0255
RS-422 Signal Termination Enclosure (Comm. Box) 0A-1229-0105
Surge Suppressor, RS422 0P-1146-0031
RS-422, 6 pos RJ11 to 10 pos QC, 30 ft. W-1504
Serial Cable, DB9-F to DB25-M, 6 ft. W-1249
Two pair, 22 AWG, stranded, shielded cable W-1234
Interconnect Cable; 31-pin male to 31-pin male, 6’,
QC
W-1503
Quick Connect Interface, Input, w/Ethernet 0P-1229-2004
31-pin, Quick Connect Input/Output Board 0P-1229-2005