Title :
Embedded controllers, field bus and a modular I/O concept: central elements of BESSY II controls
Author :
Bergl, J. ; Kuner, B. ; Lange, R. ; Muller, I. ; Müller, R. ; Pfeiffer, G. ; Rahn, J. ; Rüdiger, H.
Author_Institution :
BESSY, Berlin, Germany
Abstract :
Wherever applicable I/O nodes connected by a field bus (FB) have apparent advantages: Simple and flexible installation and cabling, easy signal conditioning as well as data filtering and process security provided by intelligent actuators and sensors. The cost of a complex 3rd control system layer may be a high development effort. At BESSY several design principles of this layer control the risk: A few multi purpose I/O cards form a modular set. Multiple I/O bus connectivity provides high installation flexibility. `Controller Area Network´ (CAN) is the FB connected to the VME system of the standard model control system. Communication is provided by a small set of software modules designed to be easily adapted to hardware changes. The communication protocol with BESSY I/O modules is a small and efficient subset of the `CAN Application Layer´ (CAL) standard
Keywords :
accelerator control systems; electron accelerators; embedded systems; field buses; input-output programs; storage rings; BESSY II controls; Controller Area Network; VME system; data filtering; embedded controllers; field bus; intelligent actuators; modular I/O concept; multi purpose I/O cards; multiple I/O bus connectivity; process security; standard model control system; Centralized control; Communication cables; Communication system control; Control systems; Costs; Data security; Filtering; Intelligent actuators; Intelligent sensors; Signal processing;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.751251
