Controller Area Network (CAN) - A Fieldbus Gives Access
to the Bulk of BESSY II Devices
B. Kuner, R. Lange, I. Muller, G. Pfeiffer, J. Rahn, H. Rudiger,
BESSY
The superior properties of the CAN fieldbus will be widely utilized for BESSY
II. Literally any power converter, the PLC of the radio frequency, vacuum
valves and gauges etc. will be interfaced by embedded controllers attached to a
CAN segment. Further more it is envisaged to set up a feed forward insertion
device compensation scheme that is based on a specific CAN installation. Today
a unified data exchange convention (called SCI: Simple CAN Interface)
facilitates development of communication tasks between CAN chips of different
manufacturers on the embedded controllers or the VME master. The usefulness of
the specific subset CAN Message Specification (CMS) of the CAN Application
Layer (CAL: proposed standard) protocol is under study.