MOSH3 —  Speakers’ Corner   (07-Oct-19   17:00—18:45)
Chair: S. Nemesure, BNL, Upton, New York, USA
Paper Title Page
MOSH3001 An EPICS Channel Access Implementation on Siemens PLCs -1
MOPHA018   use link to see paper's listing under its alternate paper code  
 
  • M. Boros
    evopro Holding Zrt., The evopro group, Budapest, Hungary
  • R.N. Fernandes
    ESS, Lund, Sweden
  • B. Peceli, G. Singler
    evopro Innovation Ltd, Budapest, Hungary
 
  At the European Spallation Source (ESS), a neutron research facility in Sweden, most of the controls are based on PLCs and layered in the following (traditional) way: field equipment <-> PLC <-> EPICS IOC <-> high-level applications. In many situations, the EPICS IOC layer will not implement control logic per se and is only used for converting PLC tags into EPICS PVs to enable the usage of high-level applications such as CS-Studio, Archiver Appliance, and BEAST. To alleviate this (traditional) way of doing controls, we propose a simpler approach: implementation of the Channel Access (CA) protocol in the PLC layer for the latest family of Siemens PLCs to remove the EPICS IOC layer. We called it S7EPICS. S7EPICS fully respects version 13 of the CA protocol specification, and supports multiple EPICS-based client connections at the same time - e.g. CS-Studio, Archiver Appliance - without a noticeable service degradation (i.e. delays). In this paper we introduce this implementation, its architecture and workflow, benchmarking results of tests performed, and future developments that could be pursued such as authentication & authorization mechanisms using, e.g., the Arrowhead Framework.  
 
MOSH3002
Standarized Approach for Automatic Measurement and Application of Local Feed-Forward Correction for Insertion Devices  
MOPHA077   use link to see paper's listing under its alternate paper code  
 
  • G.W. Kowalski
    Solaris National Synchrotron Radiation Centre, Jagiellonian University, Kraków, Poland
 
  Using insertion devices, while generally beneficial for beamline science, comes with its drawbacks. The main problem is the impact a device has on the orbit shape and stability. Accelerators not equipped with the fast orbit feedback system, suffer sudden and large beam position shifts, that can even make operation on beamlines impossible. Presented solution is meant to simplify and automatize the insertion device measurement process, as well as application of the calculated correction. Whole system aims to be reusable for different insertion devices on different beamlines.  
poster icon Poster MOSH3002 [0.730 MB]