Fall 2014 EPICS Collaboration Meeting, 20-23 Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 1 Disclaimer: The views and opinions expressed.

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Presentation transcript:

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 1 Disclaimer: The views and opinions expressed herein do not necessarily reflect those of the ITER Organization New ASYN Driver for S7 PLCs Ralph Lange ITER Organization Control System Division

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 2 ITER’s Slow Controller: S7 Hardware catalogue defines S7 for Slow Controller CODAC Core System uses the PSI S7PLC support SDD creates configuration for PLC code and EPICS DB Connecting 1000s of PLCs

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 3 ITER Extensions to S7PLC Driver Redundant PLCs: driver talks to two PLCs Timestamps from PLC CODAC Frame: timestamp, redundancy status, magic numbers, application version → PSI code was heavily patched

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 4 Requirement: New Protocols Native S7 Protocol (using nodave or snap7) –Allows writing or reading single variables –Full access to PLC data –Does not require changing PLC side code –Relatively slow ISO-on-TCP …?

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 5 Requirement: Events Capture all changes in PLC retaining order (with PLC cycle resolution) Packed single bits (BOOLEAN) and a timestamp Both PLC and IOC buffer updates PLC sends on change

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 6 ASYN Allows Modular Design Raw TCP data block protocol: port driver S7 protocol: port driver Redundancy support: port driver ISO-on-TCP: interpose layer CODAC frame: interpose layer Above: generic ASYN device support Beneath: drvAsynIPPortDriver

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 7 Status Original PSI driver functionality is working Next: Redundancy, S7 protocol Then: Events, ISO-on-TCP Will be made available as pure EPICS module (no CODAC dependency) in Q1/2015

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 8 ASYN Driver for Files Initial use case: Read numeric data (Linux daemon stats) from file into EPICS Idea: Create port driver that reads from file, StreamDevice does the formatted read More important use case: Run unit tests of ASYN drivers without any hardware, by replacing the device input stream with a file port

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 9 Status Initial use case functionality (reading numbers from file) working Will be made available as pure ASYN driver (no CODAC dependency) in Q1/2015

Fall 2014 EPICS Collaboration Meeting, Oct 2014, CEA Saclay, France © 2014, ITER Organization Page 10 Thank you