2.39 sddspcas

• description: sddspcas is a Portable Channel Access Server (PCAS) that creates and serves EPICS process variables (PVs) from one or more SDDS input files. Each input file must contain a ControlName column with PV base names. Optional columns (e.g., Hopr, Lopr, ReadbackUnits, ElementCount, Type) control limits, engineering units, waveform length, and data type.

  If an Equation column is present, PV values can be automatically updated based on expressions involving other PVs.

• examples:
  # Serve PVs described by an SDDS file  
  sddspcas pvlist.sdds  
   
  # Add a prefix to all served PVs and run for 10 minutes  
  sddspcas pvlist.sdds -pvPrefix=TEST: -executionTime=600  
   
  # Enable periodic noise updates  
  sddspcas pvlist.sdds -pvPrefix=TEST: -noise=1  
   
  # Run without checking master PV lists  
  sddspcas pvlist.sdds -standalone

• synopsis:
  usage: sddspcas <inputfiles>  
        [-masterPVFile=<filename>]  
        [-pcasPVFile=<filename>]  
        [-debugLevel=<debug level>]  
        [-executionTime=<seconds>] (default=12 hours, 0=forever)  
        [-pvPrefix=<PV name prefix>]  
        [-noise=<rateSeconds>]  
        [-runControlPV=string=<string>,pingTimeout=<value>]  
        [-runControlDescription=string=<string>]  
        [-standalone]

• switches:
  • -masterPVFile — SDDS file containing IOC PV names. Used to ensure no duplicate PVs are created.
  • -pcasPVFile — SDDS file tracking PVs created by sddspcas. Used to prevent multiple servers from advertising the same PVs and to record the serving host.
  • -standalone — Do not use the master PV files unless explicitly provided.
  • -executionTime — How long to run in seconds. Values less than 0.5 are treated as “forever”.
  • -pvPrefix — Prefix prepended to all PV names.
  • -noise — Periodically adds small random noise to numeric PV values.
  • -debugLevel — Increase diagnostic output.
  • -runControlPV / -runControlDescription — Optional run-control integration (if built with runcontrol).
• see also:
  • sddsSoftIOC()
  • cavget()
  • cavput()
• author: Robert Soliday, ANL/APS.