4

Table 11.

Non-Maskable Fault Group Descriptions

 

 

 

 

 

Table

 

 

Fault Group

Type

 

Description

 

 

 

 

 

 

 

 

SYS_BUS_FAIL

CPU

 

Systembus failure.

 

 

 

 

NO_USER_PRG

CPU

 

No User's Program on Power-up.

 

 

 

 

BAD_USER_RAM

CPU

 

Corrupted User RAM detected on Power-up.

 

 

 

 

WIND_CMPL_FAIL

CPU

 

Window Completion Failure in Constant Sweep Mode (i.e., all

 

 

 

windows failed to receive their allotted time).

 

 

 

 

PASSWD_FAIL

CPU

 

PasswordAccess Failure.

 

 

 

NULL_SYS_CNFG

CPU

NULL System Configuration for RUN Mode.

 

 

 

 

CPU_SOFTWR

CPU

 

PLC CPU Software Failure.

 

 

 

 

TOO_MANY_IOCS

CPU

 

More than the allowable number of I/O Bus Controllers were

 

 

 

found in the system.

 

 

 

SEQ_STORE_FAIL

CPU

Communicationfailure during a store operation by the program-

 

 

 

mer. This fault results when the start-of-store sequence was

 

 

 

received but not an end-of-storesequence.

 

 

 

 

Table 12. Non-Maskable Fault Action Descriptions

 

 

Fault Actions

 

 

 

 

Fault Group

Simplex Mode

 

Redundant Mode

 

 

 

 

 

 

 

 

SYS_BUS_FAIL

Fatal

 

Fatal

 

 

 

 

NO_USER_PRG

Non-Fatal

 

Non-Fatal

 

 

 

 

BAD_USER_RAM

Fatal

 

Fatal

 

 

 

 

WIND_CMPL_FAIL

Non-Fatal

 

Non-Fatal

 

 

 

 

PASSWD_FAIL

Non-Fatal

 

Non-Fatal

 

 

 

 

NULL_SYS_CNFG

Non-Fatal

 

Non-Fatal

 

 

 

 

CPU_SOFTWR

Fatal

 

Fatal

 

 

 

 

TOO_MANY_IOCS

Fatal

 

Fatal

 

 

 

 

SEQ_STORE_FAIL

 

Fatal

 

 

fatal

 

 

 

 

GFK-0827

Chapter 4 Operation

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State Industries GFK-0827 manual Non-Maskable Fault Group Descriptions, Non-Maskable Fault Action Descriptions