Beckhoff EPP6228-0022, Manual

Page: 55 / 79

Commissioning and configuration
EPP6228-0022 55 Version: 1.3
6.6 Access to IO-Link data
6.6.1 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.
Fig. 38: 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 [
}
57] . The events are additionally displayed under Diag History [
}
60] in the
System Manager.
• Cyclic data:
- Process data
- Value status
• Acyclic data:
- Device data
- Events