Cost-efficient PLC+HMI needed

Hi. I am looking for a cheep PLC+HMI (in a single box) (just like Unitronics Jazz/M91) which would have a native screw terminal COM port supporting RS485. The communication protocol is Modbus RTU "8N1".

The PLC must:
-Have some non-electric-volatile memory;
-Deal with standard Modbus RTU functions;
-Have standard ladder elements;
-Live debug mode is an advantage;
-PID loops

{number of PLC's I/O's are not of concern}

Purpose:
I'm running a large home-automation network with my custom-made Arduino clones. The controllers are communicating using modbus RTU protocol, over a RS485 network. The PLC+HMI will act like a supervisor/master.

what about the unitronics v570?

crawler009 said:

what about the unitronics v570?

Click to expand...

A total overkill. It's not cost efficient.
The acceptable price is 130 USD or below.

Check out the Click PLC from automation direct.
https://www.automationdirect.com/ad...lers/CLICK_Series_PLCs_(Stackable_Micro_Brick)

You can then use AdvancedHMI as the interface to the controller.
https://sourceforge.net/projects/advancedhmi/

Communications are Modbus RTU / Modbus TCP

http://accautomation.ca/click-plc-advancedhmi-communication/

Regards,

I think Garry was trying to link these:

https://www.automationdirect.com/ad...Series_PLCs_(Stackable_Micro_Brick)/PLC_Units

SvjatoslavsKrasnikov said:

A total overkill. It's not cost efficient.
The acceptable price is 130 USD or below.

Click to expand...

130 USD for a PLC+HMI combo? I think you need to rethink your budget.

You aren't going to find what you want for 130. Do you have a home server of any type?

look into a raspberry pi and the optional touch screen for it. There's not much you can't do with them and the pi and screen will still be under $130

SvjatoslavsKrasnikov said:

A total overkill. It's not cost efficient.
The acceptable price is 130 USD or below.

Click to expand...

uhh, good luck. But tell us please if you find a HMI+PLC for that price.