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

LinuxCNC Documentation                             2008-11-23                                   CLASSICLADDER(9)