B

Fault Extra Data

This field contains details of the fault entry. An example of what data may be present are:

Corrupted

User RAM

Group:

Four of the error codes in the System Configuration Mismatch group supply fault extra data:

Table B-5. PLC Fault Data - Illegal Boolean Opcode Detected

Fault Extra Data

Model Number Mismatch

[0]

ISCP Fault Register Contents

 

 

[1]

Bad OPCODE

 

 

[2,3]

ISCP Program Counter

 

 

[4,5]

Function Number

 

 

For a RAM failure in the PLC CPU (one of the faults reported as a PLC CPU hardware failure), the address of the failure is stored in the first four bytes of the field.

PLC CPU

Hardware

Failure (RAM

Failure):

PLC Fault Time Stamp

The six-byte time stamp is the value of the system clock when the fault was recorded by the PLC CPU. (Values are coded in BCD format.)

Table B-6. PLC Fault Time Stamp

Byte Number

Description

 

 

 

 

1

Seconds

2

Minutes

3

Hours

4

Day of the month

5

Month

6

Year

 

 

GFK-0467K

Appendix B Interpreting Fault Tables

B-7

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Image 283
GE 90-30/20/Micro manual Fault Extra Data, PLC Fault Time Stamp, Table B-5. PLC Fault Data Illegal Boolean Opcode Detected