ACCELERATOR CONTROL WITH THE LONWORKS FIELDBUS
M. Smolej, Bogdan Jeram, K. Kenda, I. Kriznar, B. Lesjak, M. Perko, U. Platise, M. Pleško · CERN Document Server (European Organization for Nuclear Research) · 1999
The device access layer of the control system of the light source ANKA is almost completely based on LonWorks.We have developed and produced custom I/O boards that use the LonWorks micro-controller (the Neuron).The hardware comprises a high-precision 16-bit DAC/ADC/function generator board, a 40 channel digital I/O+counter board and a serial interface.The device logic has been programmed already at the Neuron level, such that for example power supplies that are controlled either through a DAC/ADC board or through a serial interface look the same on the fieldbus network.The features include state machine, remote command invocation and event driven communication with monitors and alarms.The nodes are automatically configured at start-up time from a PC-resident, version-controlled database for which an ftp-like protocol has been developed.Other tools, which allow for a generic control implementation, are a network node installation and configuration tool, a node inspection and management tool and a template compiler, which allows us to use the same database data on the PC and on the Neuron.