LOGO! has been successfully used in the industry and solves switching and control tasks in a convenient and cost-efficient manner. It can be used to link up to eight LOGO! basic devices in a very simple manner.
PLC Hardware was incorporated out of frustration at the ever increasing prices from hardware vendors, even when manufacturing, shipping and exchange rates have continually shifted positively.
In addition to this price structuring, major vendors have engineering houses which have access to significantly lower hardware prices (than integrators), and thus compete unfairly against their own integrators.
When it comes to getting real support external charge rates are exorbitant - to support their own products.