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KPA_EtherCAT_主站协议栈结构

关键词: EtherCAT主站,EtherCAT协议栈 EtherCAT


简介:Master Stack Architecture EtherCAT® master stack has a modular structure to respond to a challenge of each particular implementation. It makes the master scalable to fit the size of application, portable to different operating systems, adaptable to various hardware platforms and allows to develop or customize each module separately keeping the functionality of the 其他s inta...
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Master Stack Architecture

 

EtherCAT® master stack has a modular structure to respond to a challenge of each particular implementation. It makes the master scalable to fit the size of application, portable to different operating systems, adaptable to various hardware platforms and allows to develop or customize each module separately keeping the functionality of the 其他s intact.

Master's modules are grouped in the following layers, thereby all functions are clearly distributed:

 

 

Application layer

 

Application layer is responsible for interaction with various programming or/and configuration environments and 其他 applications or devices and incapsulates and .

 

  • ensures access to master's functions from side of applications or process tasks.
  • allows interaction with the master by means of Remote Procedure Calls service and provides TCP/IP or/and UDP 连接ions, for example for mailbox communication with slaves via UDP

 

Master core

 

Mailbox module

Mailbox module deploys protocols to handle process data transfer and data ex改变.
The following protocols are already supported:

 

 

Process Image module

Process Image addresses are provided in configuration, which comes as a file generated by a configuration tool. Access to the process image from control/process tasks is carried out through the master interface.

 

Distributed Clocks module

Distributed Clocks module ensures a common network time. DC synchronization enables all EtherCAT devices (master and slaves) to share the same EtherCAT System Time by compensation time differences.

 

Frame Scheduler module

Frame Scheduler is a module that manages velocity of EtherCAT frames by forwarding them to EtherCAT network driver using advanced algorithm in accordance with the priorities pre-assigned.

 

操作System abstraction layer

操作System Abstraction Layer (OSAL) allows making the master portable to any operating system with less effort.

The layer consists of two modules:

  • OS functions module contains wrappers for OS-dependent functions that deal with threads, timers, mutexes, etc.
  • Network adapter driver module that abstracts the master stack core from the underlying network implementation.



 

 

ethercat
参数资料:
KPA_EtherCAT_主站协议栈结构EtherCAT主站,EtherCAT协议栈
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