WOODWARD 9907-167 Servo speed governor

   To exchange a CI626/CI627 communication interface (for example in case of failure), the following procedure must be followed. If the transmission between the other still remaining communication interfaces shall not be disturbed it is important to make sure that the communication interface is never removed while the LED “MASTER” is on. This can be achieved by switching off the power of the affected station or removing the bus cable immediately after the LED “MASTER” goes off (which means that the responsibility for the bus master function has been passed over to the next communication interface). 

The remaining communication interfaces

   will automatically continue to share the bus master responsibilities between them and ignore the removed station. To replace the communication interface with another CI626/CI627 communication interface, just insert the new one in the slot from which the old one was removed, and insert and fix the bus cables. The CPU in Advant Controller 110 will automatically detect that the communication interface has been exchanged, and reload the user defined configuration into the new communication interface. Be sure the station number is not changed while exchanging CI626/CI627s. If the station number is changed the whole bus might need to be restarted.

Starting an Advant Controller 400 Series with a CI520/CI522

   When the network has been installed, it is time to start Advant Controller stations. Initial Start-up When a CI520/CI522 communication interface is started for the first time, it has an invalid configuration in its nonvolatile memory. The consequence of this is that the entire configuration table is deleted (that is no CDPs are configured anywhere as far as this communication interface is concerned).