The STEPS method is used to generate step changes on the U command(s).
The following parameters are read on the .xml file on the PS= tags
READ(U,900,ERR=10) UMIN,UMAX,NB,MODE,XSWITCH,IDELAI 900 FORMAT(2(F8.2,1X),I2,1X,I1,1X,F8.2,1X,I2)
where : STEPS is a module that will modify the values of (...)