What is a Ethercat Stepper Drive
Technology changes people's life,technology changes the way you think.In automation field,advanced technology directly affect a machine working,a factory operation.Today's topic is about ECON's etherCAT closed loop stepper drive,which also called closed loop motor controller,first is the stepper drive can be open loop and close loop,second this drive is etherCAT Bus stepper.Now we have a detail description of this drive by question to answer format.
FAQ 1:how many kinds of industrial communication networks?
Conclude to three types,
1)485 network:RS485/MODBUS is the very common industrial networks,as it is easy to achieve,and there are maya instruments support RS485
2)HART network: bring forward by Emerson,the main feature is superpostion digital signal on 4-20mA current signal .But HART is not open to the market
3)FieldBus network:it is the trend now,the name of a family of industrial computer network protocols used for real-time distributed control,standardized as IEC 61158.It has bidrectional,multi-points and digital communication bus features.
FAQ 2: the histroy of FieldBus
The oldest commonly used field bus technology is Bitbus. Bitbus was created by Intel Corporation to enhance use of Multibus systems in industrial systems by separating slow i/o functions from faster memory access. Today BITBUS is maintained by the BEUG - BITBUS European Users Group.
Although fieldbus technology has been around since 1988, with the completion of the ISA S50.02 standard, the development of the international standard took many years. In 1999, the IEC SC65C/WG6 standards committee met to resolve difference in the draft IEC fieldbus standard. The result of this meeting was the initial form of the IEC 61158 standard with eight different protocol sets called "Types" as follows:
Type 1: FOUNDATION Fieldbus H1
Type 2: ControlNet
Type 3: PROFIBUS
Type 4: P-NET
Type 5: FOUNDATION fieldbus HSE (High-Speed Ethernet)
Type 6: SwiftNet (a protocol developed for Boeing, since withdrawn)
Type 7: WorldFIP
Type 8: INTERBUS-S
This form of standard was first developed for the European Common Market, concentrates less on commonality, and achieves its primary purpose—elimination of restraint of trade between nations. Issues of commonality are now left to the international consortia that support each of the fieldbus standard types. Almost as soon as it was approved, the IEC standards development work ceased and the committee was dissolved. A new IEC committee SC65C/MT-9 was formed to resolve the conflicts in form and substance within the more than 4000 pages of IEC 61158. The work on the above protocol types is substantially complete. New protocols,
such as for safety fieldbuses or real-time Ethernet fieldbuses are being accepted into the definition of the international fieldbus standard during a typical 5-year maintenance cycle. In the 2008 version of the standard, the fieldbus types are reorganized into Communication Profile Families (CPFs):
CPF 1: FOUNDATION Fieldbus
CPF 2: CIP
CPF 3: PROFIBUS
CPF 4: P-NET
CPF 5: WorldFIP
CPF 6: INTERBUS
CPF 7: SwiftNet (withdrawn)
CPF 8: CC-Link
CPF 9: HART
CPF 10: Vnet/IP
CPF 11: TCnet
CPF 12: EtherCAT
CPF 13: Ethernet Powerlink
CPF 14: EPA
CPF 15: MODBUS-RTPS
CPF 16: SERCOS
Both Foundation Fieldbus and Profibus technologies are now commonly implemented within the process control field,while EtherCAT is commonly using these years
FAQ 3: what is the EtherCAT?
Ethernet for Control Automation Technology - is an Ethernet-based fieldbus system, invented by Beckhoff Automation. The protocol is standardized in IEC 61158 and is suitable for both hard and soft real-time requirements in automation technology.
The goal during development of EtherCAT was to apply Ethernet for automation applications requiring short data update times (also called cycle times; ≤ 100 µs) with low communication jitter (for precise synchronization purposes; ≤ 1 µs) and reduced hardware costs.
FAQ 4: what is the advantages of EtherCAT?
With EtherCAT, the standard Ethernet packet or frame (according to IEEE 802.3) is no longer received, interpreted, and copied as process data at every node. The EtherCAT slave devices read the data addressed to them while the telegram passes through the device, processing data "on the fly". Similarly, input data are inserted while the telegram passes through. A frame is not completely received before being processed; instead processing starts as soon as possible. Sending is also conducted with a minimum delay of small bit times. Typically the entire network can be addressed with just one frame.
1)Diagnosis:the fast, precise detection of disturbances is one of many diagnostic features of EtherCAT.
2)Synchronization:for synchronization a distributed clock mechanism is applied, which leads to very low jitter,
significantly less than 1 µs, even if the communication cycle jitters, which is equivalent to the IEEE 1588 Precision Time
Protocol standard (PTP). Therefore, EtherCAT does not require special hardware in the master device and can be
implemented in software on any standard Ethernet MAC, even without dedicated communication coprocessor.
3)Topology:using full-duplex Ethernet physical layers, the EtherCAT slave controllers close an open port automatically
and return the Ethernet frame if no downstream device is detected. Slave devices may have one, two, or more ports. Due to
these features EtherCAT enables a multitude of network topologies, including line, tree, ring, star, or any combination
thereof. The protocol also enables a multitude of communication features such as cable redundancy, Hot Connect of segments,
change of devices during operation, or even master redundancy with Hot Standby.
FAQ 5: what is ECON's EtherCAT stepper drive?
ECON's EtherCAT stepper drive,based on the protocol EtherCAT,and use Beckoff's chip to achieve EtherCAT functions. Currently,we only use this technology in one model stepper drive,it can be open loop and closed loop,matched with motor from 57~86 frame size,and voltage is 20~80VDC,it also can use for AC power,add power supply in,then changes. This drive support to program,long disctance control,digital data communication,large storage,especially the cable,it is common network cable,easy to buy from market,and cable connection is simple,cable port is less.Another big advantages,spend less money to get EtherCAT products.And one drive can use for open loop system and closed loop system.