AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
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Section Five:
AM2020/AFP1010 Trouble Codes
The microprocessor on the CPU has a number of tasks that it must continually
accomplish. The executive routine keeps track of these tasks and sequentially
sends them to the microprocessor. The "micro" is given a certain amount of time
to accomplish each task. If it does not finish the current task in the allotted time,
this trouble is generated.
Corrective Action:
1) Remove power from the AM2020/AFP1010, batteries first and then AC.
Reapply power - AC first, then batteries.
2) If the trouble does not clear, call Notifier Technical Support.
During normal operation, the CPU polls each board in the system (LIB, DIB, SIB)
several times every second. When an inquiry is sent to a board, it sends a
response back to the CPU. If, however, the CPU receives a response from a
board without asking for it, this trouble will be generated.
Corrective Action:
1) Remove power from the AM2020/AFP1010, batteries first and then AC.
Reapply power - AC first, then batteries.
2) If the trouble does not clear, call Notifier Technical Support.
During the normal CPU polling/response cycle, which is explained above, this
trouble will be generated if the response received by the CPU is invalid or corrupt.
This was likely caused by a large electrical transient nearby.
Corrective Action:
1) Remove power from the AM2020/AFP1010, batteries first and then AC.
Reapply power - AC first, then batteries.
2) If the trouble does not clear, call Notifier Technical Support.
This trouble will be generated if the task buffer of the executive routine overflows.
Simply put, this means that there is a long list of tasks for the microprocessor to
do. Eventually, as more and more tasks are added to this list, the buffer or que,
overflows.
Corrective Action:
1) Remove power from the AM2020/AFP1010, batteries first and then AC.
Reapply power - AC first, then batteries.
2) If the trouble does not clear, call Notifier Technical Support.
T00 CPU Executive
Routine Re-entered.
T01 CPU Receive Queue
Overflow.
T02 CPU Data Message
Received Error.
T04 CPU Level Queue
Full.
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