EPICS Process Variable Naming Conventions

This Document

This document is a set of criteria to be used when deciding on the EPICS Process Variable name in the EPICS record.

Naming Convention

An EPICS record in the database file (*.db) is described as follows:-

record('record type',"record name") { record fields }

For ING the "record name" is composed of 3 fields separated by the colon (:) character ie. "Field 1:Field 2:Field 3". The "record name" is in lowercase ASCII and uses no other characers than a to z, the numbers 0 to 9 and the colon (:).

• Field 1

  This field is determined by ING and is the project or EPICS IOC crate name. the following Field 1 names have been determined by ING:-

  • ingrid
  • integral
  • isisp
  • liris
  • mbvme03
  • naomiomc
  • naomisdsu
  • oasis
  • osca
  • wyffos

• Field 2

  This field usually describes the mechanism which the record is attached to:-

  • fwheel1 (filter wheel number 1)
  • lyotstop (Lyot Stop)
  • xaxis (X axis mechanism)
  • mech (The total mechanism)

• Field 3

  This field usually describes the action or status of the mechanism for example:-

  • motor (stepper motor)
  • encoder (encoder)
  • status (mechanism status read back)
  • enable (enabling action)

Examples

"ingrid:fwheel1:motor" is the motor record for filter wheel 1 in INGRID

"integral:yaxis:current" is the calc record to calculate Current Axis Position in INTEGRAL

"wyffos:slitfoc:encoder" is the ai record for the slit focus encoder position in WYFFOS

"isisp:pbspin:commstat" is the mbbi record for the Bottom Waveplate Spin command status in ISISP