Process Station ABB FieldController 800
45
7.3 Redundancy toggle
If any of the following occur at the Primary, a redundancy toggle is initiated deliberately between
Primary and Secondary:
• the Prim/Sec toggle switch of the FieldController is actuated,
• the Prim/Sec button of the resource is actuated in commissioning mode,
• the reset switch is actuated > 5 s, resulting in a cold start of the Primary,
• the system function „Force redundancy toggle“ is executed.
7.4 Redundancy criteria
If the following have been established by the self-test diagnosis, a redundancy toggle between
Primary and Secondary is forced:
§ a different module insertion has been detected in the two FieldControllers,
§ a module fault has occurred,
§ an equipment fault has been detected on the fieldbus module,
• the watchdog has responded: a hardware fault has occurred on the FieldController,
• a power fail of the power supply is reported,
• a network fault (Ethernet) has occurred,
• a “fatal software error” has occurred.
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