Hi,

I am trying to program outdoor lights, without a sensor, just switch on when it becomes dark.
I am using the Calculate_SunriseSunset function block, based on longitudinal and latitudinal.
this gives me the correct elevation and azimuth of the sun.

How can I now use this to trigger my relays?
And beside this, I also want to be able to swith them off/on manually.
For all my other lights, I am using the FB_LatchingRelay to switch on/off the lights.

Is all this possible using function blocks? Or do I need to program this myself in ST?
(I think I cannot find the SunriseSunset calculation in ST)

The basis idea is that my lights are switched on when it is dark enough outside and that I am able to switch them on/off manually, overriding the "dark enough" option.

Can someone help me with this?

Hi,
check the OSCAT Libs:
https://store.codesys.com/catalogsearch/result/?q=OSCAT
BR
Edwin

Can this also be used with codesys 2.3? I am still using the old version for my PLC

jpesout hat geschrieben:
Can this also be used with codesys 2.3? I am still using the old version for my PLC

Yes it can. I used it fine.

FB (Oscat) is SUN_POS (§12.50). By this you can get the sun position : when Zenith < -0.8333 it means sunset is done (you can turn on the lights)