GE 90-30/20/Micro manual Long/Short Indicator, Spare, Rack, Slot, Task

B

The System Configuration Mismatch fault entry is explained below. (All data is in hexadecimal.)

Field	Value	Description
Long/Short	00	This fault contains 8 bytes of fault extra data.
Rack	00	Main rack (rack 0).
Slot	03	Slot 3.
Task	44
Fault Group	0B	System Configuration Mismatch fault.
Fault Action	03	FATAL fault.
Error Code	01

The following paragraphs describe each field in the fault entry. Included are tables describing the range of values each field may have.

Long/Short Indicator

This byte indicates whether the fault contains 8 bytes or 24 bytes of fault extra data.

Type	Code	Fault Extra Data
Short	00	8 bytes
Long	01	24 bytes

Spare

These six bytes are pad bytes, used to make the PLC fault table entry exactly the same length as the I/O fault table entry.

Rack

The rack number ranges from 0 to 7. Zero is the main rack, containing the PLC. Racks 1 through 7 are expansion racks, connected to the PLC through an expansion cable.

Slot

The slot number ranges from 0 to 9. The PLC CPU always occupies slot 1 in the main rack (rack 0).

Task

The task number ranges from 0 to +65,535. Sometimes the task number gives additional information for PLC engineers; typically, the task can be ignored.

GFK-0467K Appendix B Interpreting Fault Tables B-3