IO-Link system communication

The EP622x IO-Link master is divided into two services. On the one hand it represents an IO-Link master in relation to the connected IO-Link devices, while on the other it is an EtherCAT slave in relation to the PLC TwinCAT master. The system communication is illustrated in Fig. Illustration of the system communication of an EtherCAT master.

In principle cyclic and acyclic data are exchanged. The cyclic process data can be accessed via the PDOs, the acyclic data via AoE. The events are additionally displayed under Diag History in the System Manager.

• Cyclic data:
• - Process data
  - Value status
• Acyclic data:
• - Device data
  - Events