In our small commercial Bakery, I have two Mondial Forni three deck tunnel ovens, with a Siemens S5 PLC 's (circa 1994).... all digital inputs, 19 motors each, and Honeywell flame control.
We are in the contemplating an upgrading to a new PLC. Our recent experience purchasing I/O modules from Siemens has been fraught with long delivery times. My question is.... What are the relevant concerns in choosing between Allen Bradley, Siemens, ABB.,or others PLC's?
Siemens support here in Middle USA is lacking (in my humble opinion). My concern with AB is that it is to proprietary, and seems to be costly on the software side. Are the generic PLC's coming of age?
Any suggestions, would be appreciated.
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