Glossary of Terms
- sequencer
- The project that defines
SNL and provides an implementation.
- The runtime library that supports execution of
SNL programs.
- cpp
- The C preprocessor. Normally not a stand-alone program but part of the
C compiler. Can be abused to preprocess
SNL code, too, which is a
constant source of compatibility problems.
- snc
- The
SNL compiler. See Compiling SNL Programs.
- SNL
- State Notation Language. What this project is about.
- assigned
- The property of a variable or array element to occur in an
assign
clause in an SNL program.
- PV
process variable
- A mutable variable that is globally visible and accessible via some
network protocol in a distributed control system, such as one based on
EPICS.
- CA
Channel Access
- The
EPICS network protocol, used to connect client programs to
PVs hosted on a server.
- EPICS
- Experimental Physical and Industrial Control System. A set of tools
and libraries for building large distributed soft real-time control
systems.
- state set
SNL jargon for finite state machine. A program may contain multiple
state sets and each runs in its own thread.- true
- Any non-zero value, as in C.
- false
- Zero, as in C.