PLC's for HVAC control.

[cica58]

In the wide range of PLC's, what are the most echonomical, applicables and singles trade marks for application in control of HVAC system.
Thanks in advance.

 

[jraef]

The one that comes with good local support from an organization that has a reputation for stability and longevity. Anything else is just a collection of cheap parts that will eventaully fail. The key is being able to do something about it quickly and efficiently when it happens.

Nobody has yet made a PLC or ay other non-military control system that will never fail (and I shudder to think about military ones that probably will too).

"Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more."
Nikola Tesla

 

[Fritzfrederix]

Hi there,

I've installed recently a cooling compressor and Plc used was an Siemens S7-300. Next month were gonna install a bigger one and again were gooing to use a Siemens PLC but this time a S7-400H.

Other PLC's used or Johnson Control, Steffa, Honeywell, DDC eso.

Rudi