Infoportal
Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
| Beide Seiten der vorigen RevisionVorhergehende Überarbeitung | Nächste ÜberarbeitungBeide Seiten der Revision | ||
| embedded_systems:ethercat:choose_linux_master [2019-02-08 14:33] – mgehrig2 | embedded_systems:ethercat:choose_linux_master [2019-02-08 14:37] – mgehrig2 | ||
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| Zeile 1: | Zeile 1: | ||
| ====== Choose a Linux Master ====== | ====== Choose a Linux Master ====== | ||
| + | ===== Overview ===== | ||
| + | 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 EtherNet port is used to connect the PC with the EtherCAT network. | ||
| + | |||
| + | |||
| ===== Realtime capability ===== | ===== Realtime capability ===== | ||
| Depending on the requirements, | Depending on the requirements, | ||
| Very good real-time behavior (max. jitter < 30 usec) is required if: | Very good real-time behavior (max. jitter < 30 usec) is required if: | ||
| - | * The Linux master must set the clock. E.g. if no distributed clock is used and the bus cannot be synchronized with a slave. See [[embedded_systems: | + | * The Linux master must set the clock. E.g. if no distributed clock is used and the bus cannot be synchronized with a slave. See [[embedded_systems: |
| 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. | ||