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embedded_systems:ethercat:choose_linux_master [2019-02-08 14:37]
mgehrig2
embedded_systems:ethercat:choose_linux_master [2019-02-13 12:41] (aktuell)
mgehrig2
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-====== Choose a Linux Master ​======+====== Choose a Linux master ​======
 ===== Overview ===== ===== Overview =====
 The linux master is a PC with Linux installed. The linux master is a PC with Linux installed.
 The kernel is patch with the rt preempt patch to make the system real-time capable. The kernel is patch with the rt preempt patch to make the system real-time capable.
-The EtherNet ​port is used to connect the PC with the EtherCAT network.+The Ethernet ​port is used to connect the PC with the EtherCAT network.
  
  
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 A time buffer, which is larger than the largest expected jitter, has to be used. A time buffer, which is larger than the largest expected jitter, has to be used.
-If the time buffer is smaller, then in some cases the timing cannot be met and the data from this cycle is lost.+If the time buffer is too small, then in some cases the timing cannot be met and the data from this cycle is lost.
  
 The smaller this time buffer is, the more time is available for calculations on the master. The smaller this time buffer is, the more time is available for calculations on the master.
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 A good real-time behavior enables a smaller time buffer. A good real-time behavior enables a smaller time buffer.
  
-The minimum cycletime, and thus also the maximum frequency of the control loop, is mainly given by this time buffer plus the calculation time (EEROS).+The minimum cycletime, and thus the maximum frequency of the control loop, is mainly given by this time buffer plus the calculation time (EEROS).
  
 TODO graphic time management on master TODO graphic time management on master
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 Check with your contact from Acontis if this ethernet controller is suitable for one of there link layers. Check with your contact from Acontis if this ethernet controller is suitable for one of there link layers.
-Check chapter 2.3.1.3 of the Acontis {{:​embedded_systems:​ethercat:​ec-master_classb.pdf|stack documentation}}.+Check chapter 2.3.1.3 of the Acontis {{:​embedded_systems:​ethercat:​ec-master_classb.pdf|stack documentation}} ​for supported network controllers.
  
 The //"​emllI8254x Intel Pro/​1000"//​ is one of the most used layers. The //"​emllI8254x Intel Pro/​1000"//​ is one of the most used layers.