World Market for Industrial Communication Technologies in Motor Control Equipment
Reprint of March 13, 2013 Automation.com Article
March 13, 2013 – The use of Ethernet with motor drives and motion controllers will more than triple to 2016 from 1.8 million new connected nodes in 2011. According to IMS Research, the compound annual growth rate (CAGR) for new motor control Ethernet nodes is projected to be the highest across the whole industrial space at nearly 30%.
IHS analyst, Tom Moore, commented “Ethernet, particularly certain industrial variants, is very well suited to drive and motion control applications. The growing number of Ethernet protocols, which are high-speed, deterministic, and low jitter, mean its application has never been easier. Some of the most suited protocols are forecast annual growth rates exceeding 30% to 2016”.
As Figure 1 shows, new Ethernet nodes are forecast to account for over 20% of the total new networked motor control products in 2016. This is a large increase from the estimated 12% in 2011, when fieldbus protocols dominated new node connections. Ethernet is quickly gaining ground in a market that is well known for being reserved and slow to adopt new technology.
Moore continued, “Part of the transition to Ethernet is due to the protocols available, such as PROFINET, Ethernet/IP, POWERLINK and EtherCAT, which are all very well suited to motor control applications. In particular, EtherCAT is well known for very high speed data transmission and low response times. Its adoption is forecast to grow very strongly to 2016, especially as its member count continues to increase.”
Networking, however, isn’t just about the technology or protocols on offer; it is about the equipment itself. Nodes, the connections to the higher network, are set to increase and part of this is being driven by an increasing number of ports per device. This has an added affect to the adoption growth of networking technologies. “The increase in node count has come about for several reasons,” indicated Moore. “More and more products are being released with the ability to daisy-chain, requiring at least 2 ports.”
Ethernet is certainly making headway in the industrial space and its projected adoption growth is set to outstrip that of fieldbus technologies in almost all applications. “It is forecast that in 10 to 15 years Ethernet will have replaced fieldbus as the mainstream networking technology for motor control products.” says Moore, “This can only be good for the unification and simplification of networking solutions; driving down costs and increasing up-time”.
“The World Market for Industrial Ethernet and Fieldbus Technologies – 2013 Edition” is now available. This includes extensive analysis of industrial Ethernet and fieldbus technologies used in motor control, process and control and discrete control.
Mechanical resonance is a pervasive problem in servo systems. Most problems of resonance are caused by the compliance of power transmission components. Standard servo control laws are structured for rigidly coupled loads. However, in practical machines some compliance is always present; this compliance often reduces stability margins, forcing servo gains down and reducing machine performance.
