Delphin ProfiMessage - 4.7.15 Pulse width modulation (PWM); 4.7.16 Calculation channel

ProfiMessage
Dead zone:Activatesthedeadzoneofthecontroldeviation(xd).Specifythezero
pointofthedeadzonewithZero point.TheentryfieldWidthcontainsthemax-
imumdeviationfromthezeropointofthedeadzone,withinwhichthecontroldevi-
ationissetto0.0.
Output limitation:Thisoptionallowsthevaluerangeofthemanipulatedvariableto
belimitedtovalueslargerthan-100%orsmallerthan+100%.Thecuttermofthe
manipulatedvariablecanoptionallybefedbacktothesecondDtermofthecon-
troller.
4.7.15 Pulsewidthmodulation(PWM)
Thissoftwarechannelgeneratesasquaresignalwithavariablefrequencyand
variablepulse-pauseratio.Thepulse-pauseratioisdeterminedbythesource.
Frequency/period:
Entereitherafixedfrequencyortimefortheperiodofthefundamentaloscillation
ornameachannelthatprovidestheappropriatevalue.
Duty cycle
Lower / upper limit:Setheretheminimumandmaximumvaluesforthepulse-
pauseratio.
Apulse-pauseratioof0%meansthatthePWMoutputispermanentlyswitched
off.Apulse-pauseratioof100%meansthatthePWMoutputispermanently
switchedon.Therangeofsourcevaluesislimitedtothespecifiedrange.
4.7.16 Calculationchannel
Thissoftwarecalculatestheinputmathematicalformula.Anynumberofsources
canbelinkedwithintheformula.Eachsourceisrepresentedbyavariablethatcan
assumeeitheraconstantvalueorthevaluefromthespecifiedchannel.
Method
1. SettherequiredvariableswithAdd variable.
Avariablenamedvar0iscreatedbydefault,butitsnamecanbechanged.
2. Setwhetherthevariableistohaveaconstantvalue(Manual value)or
whetherthevalueistobeobtainedfromachannel(Channel).
3. EntertheformulaexpressioninthefieldFormula.
Restrictions on variable names
1. Thefirstcharactermustbealphabetic(a...z/A...Z).
Thesubsequentcharactersmustbealphanumeric(lettersa...z/A...Zornum-
bers0..9)oranunderscore(_).
2. Variablenamesmustbeunique(norepeatnamesindifferentchannels).
3. Adistinctionismadebetweenupperandlowercaseletters.
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Delphin Technology AG
Dezember 2015
ProfiMessage Manual