NAME

       ClassicLadder - realtime software plc based on ladder logic

SYNOPSIS

       loadrt    classicladder_rt     [numRungs=N]    [numBits=N]    [numWords=N]   [numTimers=N]
       [numMonostables=N] [numCounters=N] [numPhysInputs=N] [numPhysOutputs=N]  [numArithmExpr=N]
       [numSections=N] [numSymbols=N] [numS32in=N] [numS32out=N] [numFloatIn=N] [numFloatOut=N]

       loadusr classicladder <file name> [--nogui]

DESCRIPTION

       This  component consist of a realtime part and a non-realtime part.  The non-realtime part
       loads the programmable ladder description, while the realtime part provides the pins.  The
       file  name of the configuration can be changed using an argument to the non-realtime part.
       By default the non-realtime part provides a graphical visualisation of the loaded  ladder,
       which can be disabled using the '--nogui' option to the non-realtime part.

       These  pins  and  parameters  are  created  by the realtime classicladder_rt module.  Each
       period (minimum 1000000 ns), ClassicLadder reads the inputs, evaluates  the  ladder  logic
       defined in the GUI, and then writes the outputs.

PINS

       classicladder.0.in-NN IN bit
              These bit signal pins map to %INN variables in ClassicLadder.

       classicladder.0.out-NN OUT bit
              These  bit  signal  pins  map  to  %QNN  variables  in  ClassicLadder.  Output from
              ClassicLadder.

       classicladder.0.s32in-NN IN s32
              Integer input from ClassicLadder.  These s32 signal pins map to %IWNN variables  in
              ClassicLadder.

       classicladder.0.s32out-NN OUT s32
              Integer output from ClassicLadder.  These s32 signal pins map to %QWNN variables in
              ClassicLadder.

       classicladder.0.floatin-NN IN float
              Integer input from ClassicLadder.  These float signal pins map to  %IFNN  variables
              in ClassicLadder.  These are truncated to S32 values internally. eg 7.5 will be 7.

       classicladder.0.floatout-NN OUT float
              Float output from ClassicLadder.  These float signal pins map to %QFNN variables in
              ClassicLadder.

       classicladder.0.hide_gui IN bit
              This bit pin hides the ClassicLadder window, while still  having  the  non-realtime
              code  run.  This  is  usually desirable when modbus is used, as modbus requires the
              non-realtime code to run.

PARAMETERS

       classicladder.0.refresh.time RO s32
              Tells you how long the last refresh took.

       classicladder.0.refresh.tmax RW s32
              Tells you how long the longest refresh took.

       classicladder.0.ladder-state RO s32
              Tells you if the program is running or not

FUNCTIONS

       classicladder.0.refresh FP
              The rung update rate. Add this to the servo thread.  You can added it to  a  faster
              thread but it.  Will update no faster than once every 1 millisecond (1000000 ns).

BUGS

       See http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ClassicLadder_Ver_7.124 for the latest.

SEE ALSO

       ClassicLadder  chapters  in  the  LinuxCNC  documentation  for  a  full description of the
       ClassicLadder syntax and examples.

       http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ClassicLadder_Ver_7.124