Mailbox module

KPA Master Core mailbox module deploys protocols to handle service data objects (SDP), data transfer and data exchange. The following protocols – according to the EtherCAT standard – are already supported:

  • CAN application protocol over EtherCAT (CoE)
  • Ethernet over EtherCAT (EoE)
  • Servo Profile over EtherCAT (SoE)
  • File Access over EtherCAT (FoE)
  • Vendor specific Profile over EtherCAT (VoE)
  • ADS over EtherCAT (AoE)

Process Image Module

Process Image addresses are provided by EtherCAT network information (ENI) 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 (DC) module enables all EtherCAT devices (master and slaves) to always share the same EtherCAT system time. This is done by compensating offset and drift time. For more details please refer to

  KPA EtherCAT Master Synchronization Flyer

Frame Scheduler Module – Different Scan Rates for PDO

In the configuration tool the user defines scan rates for each slave individually. Frame Scheduler module manages velocity of EtherCAT frames by forwarding them to EtherCAT network driver.

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