[Shop-talk] Web based PLC

[Wayne]

eric at megageek.com wrote:
> I don't want to have a 220v line run from the pump, up the 5 stories to 
> the roof of the building.  So I was thinking that I could put a network 
> PLC device up near the tank  and another one near the pump.  I could log 
> into the device via a web interface and program it to turn the pump on and 
> off based on the position of the contacts in the float switch. 

Sounds like an awfully complex solution.  Is the network stuff already 
in place?  I could see doing it in a factory where the network is a 
given and you have a bunch of other ones to manage.

But couldn't you use some simple low voltage signaling to a plain old 
relay at the pump?

> one to turn on and off the pump." You have to love countries where labor 
> is cheap.

Yeah, right up to the point where they become a "problem" and/or reason 
to wage war.  Oh well, it's cold here.  Off to walmart for a new afghan.

-Wayne