How to use the output of a PID Controller in LabVIEW?

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error in modelling model in Abaqus

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what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

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--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

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Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

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David Tatrai

Hi,

I'd do something like Thomas recommended. See code snippet attached.

David

Maciej Basiura

If I understand, you want to do a PWM output on a standard digital output.

The principle is the same as described by Thomas.

I do not know well LabVIEW, but maybe can helps the solution given by NI in similar problem http://digital.ni.com/public.nsf/allkb/1561D31534F07D608625727900391114

Patrick Gassen

Thanks to everybody of you for your help. At the moment i try to realise a pwm signal without using a loop. Instead iam using the timeout of an event structure. Because when iam using a loop i came never out of the case. But i need this loop to calculate so i can't stop it by using the stop condition.

Parantapa Sawant

Hi Everyone,

I found out this thread after searching for my own LabVIEW problem which is similar to Patrick's. I really hope someone could help me out.

I am trying to use a PID controller to control a three-way valve in real time for achieving the set-temperature. Here the only control signals for the valve are ON/OFF for both directions. Thus the valve then turns in anyone direction at 70 mm/s or just stops in the last position after signal is stopped. The total stroke length is 4.5 mm.

I am also using Beckhoff in the PLC and the LabVIEW communication is through a OPC Shared Variable Engine in real-time with the valve.

For my first approach I have tried to create a simple three-step controller by combining 2 two step-controllers (pic attached). Wherein the valve moves in the relevant direction if the dT is greater then 1K. So a total hysteris of 2K is considered.

Thanks very much in advance for any feedback or links which could help me solve my issue.

Regards