ServoWire is ... consistent

IEEE-1394 provides technology to guarantee delivery of real-time servo information each loop update.

ServoWire® implements digital torque mode algorithms using key technology within IEEE-1394 that defines an elegant standard for isochronous data transfers.

Isochronous transfers guarantee real-time information is "absolutely, positively" delivered at a pre-determined rate, especially important for just-in-time delivery of data such as time-critical servo loop updates.

The ServoWire® protocol allocates network bandwidth for each servo on the network to guarantee timely transmission of torque commands, position feedback, and high-speed I/O status during each loop update for all drives in a ServoWire® network.

Including high-speed I/O in the isochronous data channel guarantees that the ServoWire® Axis Module can always drive or respond to high-speed I/O (four programmable limit switches and three sensors per drive) on the next loop update.

Many applications benefit from the precise synchronization of high-speed I/O and motion control. Line-oriented manufacturing systems, many within the packaging and converting industries, frequently demand I/O response far beyond the capabilities of PLCs. An example of this is a rotary knife application on a converting machine, where a knife must cut a web of pre-printed boxes to an accuracy of 15 mils at line rates up to 1,200 feet per minute.