How The Data Exchange Works; Data Integrity - HMS Networks Anybus Communicator User Manual

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How the Data Exchange Works

Anybus Communicator - EtherNet/IP to EtherCAT MDevice
5.3. How the Data Exchange Works
Figure 6. The Communicator internal memory areas
The data exchanged between the Communicator and the EtherCAT subnetwork and the high level network
resides in the Communicator internal memory buffer.
To exchange data with the EtherCAT subnetwork, the high level network reads and writes data to the
Communicator internal memory buffer.
The same memory locations are exchanged on the EtherCAT subnetwork.
The memory locations are specified when you scan the EtherCAT network and the node(s) configuration is
uploaded to the Communicator using the Communicator built-in web interface.
Input Data
The Input data area is read by the high level network.
Output Data
The Output data area is read/written by the high level network.

5.4. Data Integrity

A snapshot of the process data buffer between the EtherCAT Client and the MDevice interface is used during the
operation of executing all the process data objects within one cycle.
When the cycle is completed, the process data available on the MDevice and SubDevice(s) interfaces is updated
and a new snapshot is created for the next cycle.
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