Process Station ABB FieldController 800
43
7 Redundancy
In the case of redundancy a bumpless toggle is achieved between the active FieldController (Pri-
mary)and a passive FieldController (Secondary), so that :
• in the case of CPU failure the outputs of the I/O components are maintained,
• the internal states (component data, variable values) are maintained,
• Configuration and working data are automatically adjusted between the active and passive
FieldController.
7.1 Network configuration in the hardware structure
A FieldController possesses a Resource ID and an IP address. In the case of redundant Field-
Controllers an IP address is specified for each of the two FieldControllers.
Configuration → System → Hardware structure → Network
Which of the CPU modules is Primary and which is Secondary is not defined by IP address
1 and IP address 2.
The coding switch on the Ethernet module used for the redundancy link must be set to IP
address 15 (switch position F). See Mounting and Installation Instructions. This module
must always be installed in slot E2.
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