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1

oscat.lib fuer CoDeSys 3 / DWORD counter

« am: 07. Januar 2017, 16:21:20 »

Hello all,

I am having trouble by not finding a suitable UP counter that can store values more than the approx. 65.000 but rather store the value in a DWORD
Is there a stabdard counter somewhere in teh CODESYS lib that I can use and have missed?
Is there somebody out there that can help me out please?

Thank you already,
V

2

oscat.lib fuer CoDeSys 3 / A/D Convertor

« am: 27. Oktober 2013, 21:38:12 »

(Sorry for my English, my German isn't strong enough in writing)

I am looking for a way on how I can convert an INT value to a BOOL (AD convertor) that can replace following Siemens module:
http://shop.sigstu.com/out/media/5102.%20E_10.98.pdf

Can somebody help on on the right track how to make this possible?
In short, I read the room temperature, bring this to a P simple P controller and get an INT value out. The set point is 25°C, the bandwidth for the P is 1°C.

All help is appriciated!

3

oscat.lib fuer CoDeSys 3 / HX calculator

« am: 05. Juli 2012, 18:24:01 »

Hello people, I am able to read German but just can't write it. I am a user of SoMachine software for both Schneider M268 and M258 PLC's. More and more do I start using them for HVAC solutions and found already a few FB's for calculating Enthalpy but what would really help is a HX calculator.
Oscat in general was a revelation when I was told about this extensive library but like written above could an HX FB really be a worthy add-on to any upcoming release.

It's a FB that has basically 3 inputs
- dry bulb temperature (regular air temperature in °C) with accuracy of 0.1°C
- % relative humidity ranging from 0 to 100% with accuracy of 0.1%RH
- atmospheric pressure in Pascal (Pa)

And then 3 outputs:
- Absolute humidity in grams/kilo air with accuracy of 0.1g/kg
- Enthalpy in kcal/kg air with an accuracy of 0.001 kcal/kg
- DewPoint temperature in °C

As this is regular HVAC is the input temperature never going to be anywhere between -50.0°C and +50.0°C (and so will the dew temperature)

Attached to this post is an Excel document that is showing the calculations to reach the 3 output results.

Sorry for writing this in English but German is not an option as this would be for all of us unreadable .

Thank you and keep up the good work.
Should anyone however is able to put this in a FB separately it would be much appreciated.

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