Lenze I/O system 1000 - Ethercat Frame

Lenze · I/O system 1000 · Reference Manual · DMS 5.0 EN · 09/2016 · TD17 324
7 EtherCAT communication
7.1 About EtherCAT
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7.1.1 EtherCAT frame
EtherCAT frames have the following structure:
Ethernet header
The Ethernet header contains the following information:
• Target address of the EtherCAT frame (destination)
• Source address of the EtherCAT frame (source)
• Type of the EtherCAT frame (EtherType)
Ethernet data
The Ethernet data contain the following information:
• Length of the datagrams within the EtherCAT frame (length)
•One reserved bit
• Type of the datagrams within the EtherCAT frame (type)
•Datagrams
FCS
•Checksum of the EtherCAT frame
Ethernet header Ethernet data FCS
48 bits 48 bits 16 bits 11 bits 1 bit 4 bits 48 ... 1498 bytes 32 bits
Destination Source EtherType header Datagrams
Length Reserved Type