TROUBLESHOOTING
DIAGNOSTICS
5 - 8
I-E96-202B
®
display the diagnostic test number but LED eight will illumi-
nate. LED seven is not used in test number display mode.
Pole two of dipswitch SW4 selects a halt on error feature. In
this mode, the MFP module halts diagnostic test execution
whenever the selected test detects an error. The front panel
LEDs display the number of the failed test.
Poles three through eight of dipswitch SW4 select the diagnos-
tic test to be executed. Pole eight is the least significant bit
(binary weight 1) and pole three is the most significant bit
(binary weight 32). Diagnostic test numbers can range from 00
(hex) to 42 (hex). Table
lists the available diagnostic tests
and their number.
Figure 5-3. Diagnostic Dipswitch
Settings
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
ON
ON
OFF
OFF
DIPSWITCH
SW3
MODULE ADDRESS
TEST ID
HALT ON ERROR (ON = DISABLED, OFF = ENABLED)
OFF = PASS/FAIL DISPLAY,
ON = TEST NUMBER DISPLAY
TP21168A
UNUSED
BUS MODE (OFF = MODULE BUS, ON = CONTROLWAY)
DIAGNOSTIC MODE (OFF = ENABLED, ON = DISABLED)
DIPSWITCH
SW4
Table 5-8. Diagnostic Tests
Test Name
Test ID
Description
Switches and LEDs
00
Byte value of all dipswitches are exclusive OR'd together.
Results are displayed on LEDs. Status LED is OFF for even or
ON for odd total.
CPU
01
Verifies CPU instruction set is operational.
ROM
02
Calculates checksum of ROM memory and compares it to
value stored in ROM memory during programming.
MMU
03
Exercises the on-board memory management unit.
RAM
04
Performs walking 1 test. Clears, verifies, sets and verifies all
RAM memory. Test includes byte, word and long word
accesses.
NVRAM
05
Verifies read and write function of NVRAM memory.
PLD
06
Loads programmable logic devices on the MFP module. Veri-
fies proper loading and operation.
Password
07
Verifies firmware version is valid for current password stored
in password PAL.
