Manual

4.2. How the Data Exchange Works
Figure 2. The Communicator internal memory areas
The data exchanged between the Communicator and the Modbus TCP and the EtherCAT resides in the
Communicator internal memory buer.
The Communicator internal memory buer is divided into two areas: Input data and Output data.
Input Data
This Input data area is read by the EtherCAT.
The Communicator can handle up to 1486 bytes input data.
Output Data
The Output data area is read/wrien by the Modbus TCP.
The Communicator can handle up to 1500 bytes output data.
4.3. Data Integrity
A snapshot of the process data buer between the Modbus TCP/EtherCAT Client and the server interface is used
during the operaon of execung all the transacons within one cycle.
When the cycle is completed, the process data available on the server interface is updated and a new snapshot is
created for the next cycle.
How the Data Exchange Works Anybus
®
Communicator
™
- Modbus TCP Server to EtherCAT Slave
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