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8.12 Self-diagnosis
Diagnostic algorithms are run on device switch on and continuously during operation of the relay. These
diagnostics guarantee the correct working of the device, as a preventive process.
The following general considerations apply:
•
Communications between different CPUs are confirmed with corresponding integrity checks.
Continuing anomalies will lead to the restarting of the device.
•
Data constituting settings are confirmed with corresponding checks. Furthermore, all tables of
settings are stored in two copies. The relay can work with a corrupted table, but not if both tables
are corrupted.
•
A Watchdog mechanism exists, both between and within the different main CPUs. Loss of
activity in any CPU will lead to the restarting of the device, which will be logged as an event.
The state flag bits associated with this process are as follows:
Model Error
It is active when the firmware version doesn’t match the harware model.
Hardware Error
It is active when there is a problem in the harware.
COM Error
It is active when there is a problem with the communication between the
main CPU and the communication CPU.
Test State
This bit is included in this menu despite doesn’t indicate an error. It is active
when the test menu is being performed on the relay.
Measurement Error (*)
It is active when there is a problem with the communication between the
main CPU and the measurement CPU.
(*) This bit is included in the Measurements State
Содержание SIL-A A Series
Страница 8: ...www fanox com Rev 04 8 112 2 1 2 Case dimensions The dimensions are in mm...
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Страница 13: ...www fanox com Rev 04 13 112 2 2 2 Case dimensions The dimensions are in mm...
Страница 14: ...www fanox com Rev 04 14 112 2 2 3 Connection diagrams 2 2 3 1 Analogic connections...
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