advantages over PLCs

System Performancedrive.web uses TCP/IP over Ethernet in a peer-to-peer distributed control configuration. The network and control processing is done in each node (drive or other control device) and as more nodes are added to a system, the processing capacity increases proportionally. A high bandwidth is maintained regardless of the size or complexity of the system. PLCs use a central processing (CPU) concept that treats the nodes (drives and other control devices) as dumb remote i/o components. As more nodes are added to a system the CPU burden is increased and the bandwidth deteriorates.
Graphical Signal Flow Diagram OptionShowing point-to-point connections with dynamic state graphics on multiple page drawings.Not normally available.
Configuration Data StorageAll configuration data, including graphical signal flow diagram, is stored in each device.Typically only compiled data is stored in the PLC.
Programmingdrive.web is intuitive and uses clear graphical block diagram presentation of process functions. The drive.web environment incorporates libraries of full-featured, engineered function blocks for applications such as drive coordination, winder control, cut to length, spindle orientation, etc., as well as basic functions for arithmetic, logic, comparators, filters, timers, counters, etc.Programming tools are optimized for ladder logic programming and typically only offer basic signal process functionality.
Flexibility & ReliabilityAll processing is performed in the PLC CPU. If the CPU fails or is shut down, the entire system is shut down.All processing is performed in the PLC CPU. If the CPU fails or is shut down the entire system is shut down.
Multi-User Accessdrive.web supports multi-user access.Most PLCs only support single-user access.