INTRODUCTION
WBPEEUI250016A1
5 - 1
SECTION 5 - TROUBLESHOOTING
INTRODUCTION
Troubleshooting the process control unit interface is limited to
viewing the contents of the error counters and the module sta-
tus report from any INFI 90 OPEN operator interface. Refer to
the instruction for your specific computer interface for infor-
mation on module status reports.
ERROR COUNTERS
All INFI-NET communication modules have faceplate LEDs
that serve as error code displays. The NIS module has event
and error counters that are selectable (refer to Tables
and
INNIS01 MODULE ERROR CODES
The NIS module error counters total errors in the same manner
as the event counters total events. Table
lists the types of
error counters. The NIS module halts operation if a fatal error
condition occurs. Group A LEDs display error codes. Group B
LEDs are off when group A LEDs are displaying error codes.
Refer to Table
for a list of error codes and associated cor-
rective action.
Table 5-1. INNIS01 Module Error Codes
Code
LEDs
8 7 6 5 4 3 2 1
Condition
Corrective Action
13
0 0 0 1 0 0 1 1
ROM checksum error
Replace NIS.
16
0 0 0 1 0 1 1 0
Loopback test failure
Check cabling and termination unit.
Replace NIS.
31
0 0 1 1 0 0 0 1
Memory or CPU fault
Replace NIS.
32
0 0 1 1 0 0 1 0
Address or bus error
Reset NPM. replace NIS if error recurs.
33
0 0 1 1 0 0 1 1
Illegal instruction
34
0 0 1 1 0 1 0 0
Trace/privilege violation
35
0 0 1 1 0 1 0 1
Spurious/unassigned exception
36
0 0 1 1 0 1 1 0
Divide by 0/checksum/format error
37
0 0 1 1 0 1 1 1
Trap instruction
38
0 0 1 1 1 0 0 0
Invalid dipswitch setting on NIS
Check dipswitches SW1 through SW4.
3E
0 0 1 1 1 1 1 0
NIS/device handshake failure
Verify that dipshunt exists between NIS and
NPM modules. If dipshunt exists, replace
NIS or NPM.
NOTE: 0 = LED OFF, 1 = LED ON
