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TROUBLESHOOTING
NIU (TALK 90) DIAGNOSTIC TEST (IIOIS12 CONSOLES ONLY)
6 - 6
I-E96-107-2N
®
Restarting the OIS12’s CIU
In order to restart the CIU (Refer to Figure
) the procedure is:
•
Press the STOP button.
•
Press the RESET button.
•
Press the RESET button again.
NIU (TALK 90) DIAGNOSTIC TEST (IIOIS12 CONSOLES ONLY)
If the network interface unit (NIU) fails to come on-line, the
problem may be in the NIU or IIOIS12. The Talk 90 utility can
isolate the problem. Check the labels on proms U23 and U24 on
the IIMCP01 module. If the label is IIST01, the module connects
to an INFI-NET communication loop. If the label is IIPST01, the
module connects to a Plant Loop communication loop. Connect
a nine pin to 25 pin D connector serial cable (NKMR02_10 or
equivalent) between a dumb terminal and connector port B (bot-
tom port) on the IIMCP01.
Set the terminal to: 9600 baud and eight data, one stop, zero
start and no parity bits.
Follow these steps:
1. Press the right red button on the MCP (reset). The diagnos-
tic menu will appear on the terminal.
39
3E
3F
00111001
00111110
00111111
Duplicate node number on loop (MLM switch 4).
MLM to MCP handshake failure.
Stop pushbutton actuated.
Table 6-4. IMMCP01 Failure Codes
MCP
Code
Top Bottom
LED LED
87654321
Error Condition
Table 6-5. IIMLM01 Failure Codes
MCP
Code
Top Bottom
LED LED
87654321
Error Condition
13
31
32
00010011
00110001
00110010
ROM checksum error (socket U23 or U24).
Memory or CPU failure.
Address or bus error.
33
34
35
00110011
00110100
00110101
Illegal instruction.
Trace/privilege violation.
Spurious exception.
36
37
38
00110110
00110111
00111000
Divide by 0/check/format error.
Any trap instruction.
MLM not configured for MCP operation. (MLM switch 2, pole 1 needs to be ON)
3E
00111110
MLM to host handshake failure.