TROUBLESHOOTING
I-E96-225A
5 - 7
DIPSWITCH SW3 SETTINGS - DIAGNOSTICS
Set pole 1 of dipswitch SW3 to 1 (OFF position) to put the mod-
ule into the diagnostic mode. Pole 2 of dipswitch SW3 is not
used in diagnostic mode. The remaining poles select module
address and Controlway or module bus. The function of each
pole of dipswitch SW3 is the same in either diagnostic or nor-
mal mode (except pole 2).
LED Display
During diagnostic mode operation, the faceplate LEDs display
test results (refer to Figure
). On module reset, all eight
LEDs illuminate, the dipswitches are read, the selected test is
executed and the result is displayed on the LEDs.
The format of the LED display depends upon the setting of pole
1 on SW2. If this pole is in the ON position, the test number is
displayed in LEDs 1 through 6. LED 8 illuminates if the test
fails. This display format is latched on for
1
/
4
second for viewing
ease, then the LEDs blank out for about
1
/
8
second, and the
test is repeated.
01
Test CPU
0
0
0
0
0
1
02
ROM (verify ROM check-
sum)
0
0
0
0
1
0
04
Test RAM
0
0
0
1
0
0
09
Test module bus or Control-
way
0
0
1
0
0
1
0A
Test DUART timer interrupt
0
0
1
0
1
0
0B
Test dispatcher interrupt
0
0
1
0
1
1
0C
Test DUART serial channels
(local loopback mode)
0
0
1
1
0
0
0E
Test CTT module bus
0
0
1
1
0
1
0F
Null test
0
0
1
1
1
1
10
Group test (runs tests 01
through 0F)
0
1
0
0
0
0
11
DUART serial channels
external loopback. Set jump-
ers J5 and J6 to loopback
settings.
1
0
1
0
0
0
1
NOTES:
1. Refer to Figure
for loopback settings.
2. 0 = CLOSED or ON, 1 = OPEN or OFF.
Table 5-8. Dipswitch SW2 Settings for
Diagnostic Mode
(continued)
Test
No.
Diagnostic Test
SW2 Pole Settings
1
2
3
4
5
6
7
8