Honeywell Universal Digital Controller UDC 3300 Instrukcja Użytkownika Strona 272

  • Pobierz
  • Dodaj do moich podręczników
  • Drukuj
Przeglądanie stron 271
260 UDC 3300 Controller Product Manual 4/00
Procedure #8
Table 9-15 explains how to troubleshoot a Communications failure.
Table 9-15 Troubleshooting a Communications Failure
Step What to do How to do it
1
Check the field wiring and
termination resistor.
Depending on the protocol used, refer
to the proper communications manual
installation section.
2
Make sure the Communications
Printed Wiring Board is installed
properly in the controller.
Withdraw the chassis from the case
and inspect the board. See the
exploded view (Figure 10-1) for
location of the board. Return the
chassis to the case.
3
Determine if the Communications
board is faulty by running a LOCAL
LOOPBACK TEST.
If the test fails, replace the board.
Run the Local Loopback Test.
Press [SET UP] until you see:
COM
Lower Display
SET UP
Upper Display
Press [FUNCTION] until you see:
LOOPBACK
Lower Display
DISABL
Upper Display
Press or , you will see:
LOOPBACK
Lower Display
ENABLE
Upper Display
The test will run until the operator
disables it here.
Przeglądanie stron 271
1 2 ... 267 268 269 270 271 272 273 274 275 276 277 ... 293 294

Komentarze do niniejszej Instrukcji

Brak uwag