4 |
Table 11. |
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| Table |
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Fault Group | Type |
| Description |
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SYS_BUS_FAIL | CPU |
| Systembus failure. |
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NO_USER_PRG | CPU |
| No User's Program on |
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BAD_USER_RAM | CPU |
| Corrupted User RAM detected on |
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WIND_CMPL_FAIL | CPU |
| Window Completion Failure in Constant Sweep Mode (i.e., all |
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| windows failed to receive their allotted time). |
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PASSWD_FAIL | CPU |
| PasswordAccess Failure. |
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NULL_SYS_CNFG | CPU | NULL System Configuration for RUN Mode. | |
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CPU_SOFTWR | CPU |
| PLC CPU Software Failure. |
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TOO_MANY_IOCS | CPU |
| More than the allowable number of I/O Bus Controllers were |
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| found in the system. |
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SEQ_STORE_FAIL | CPU | Communicationfailure during a store operation by the program- | |
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| mer. This fault results when the |
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| received but not an |
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Table 12. Non-Maskable Fault Action Descriptions
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| Fault Actions | |
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Fault Group | Simplex Mode |
| Redundant Mode |
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SYS_BUS_FAIL | Fatal |
| Fatal |
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NO_USER_PRG |
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BAD_USER_RAM | Fatal |
| Fatal |
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WIND_CMPL_FAIL |
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PASSWD_FAIL |
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NULL_SYS_CNFG |
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CPU_SOFTWR | Fatal |
| Fatal |
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TOO_MANY_IOCS | Fatal |
| Fatal |
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SEQ_STORE_FAIL |
| Fatal | |
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| fatal | |
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Chapter 4 Operation | 79 |