ATCA Shelf Manager EPICS device support for ITER CODAC Core System

Abstract

h i g h l i g h t s• This architecture targets the health management integration into the NDS.• The developed solution supports the ShM redundancy features, specified by ATCA.• The average RTT was around 59 ms and in 99.9% of the cases was less than 130 ms.• Without losing any update cycle, can monitor a system shelf with approximately 400 sensors.• This solution enables the user to configure the entire system in DB files and st.cmd. a r t i c l e i n f o This paper presents a generic EPICS device support developed for the integration of the ATCA Shelf Manager (ShM) into the ITER CCS, providing scalability and easy configuration. The device support uses the available HTTP interface on Shelf Manager in the communication layer. Both HTTP server and sensors/actuators definitions can be configured using the EPICS database file and the Input/Output Controller (IOC) initialization file. A proposal based on this device is also presented, targeting the Nominal Device Support (NDS) for health management.The EPICS device support running in an IOC provides Process Variables (PV) to the PON network with the system information and these PVs can be used by all CA clients, such as EPICS user interface clients, alarm systems and archive systems.Operation with redundant ATCA ShMs and device support scalability tests were performed and the results are presented.