Instructions

4. About Anybus Communicator
4.1. Serial Protocol Communicaon
4.1.1. Serial Protocol Types
The gateway features three disnct modes of operaon for the subnetwork communicaon, called Modbus RTU,
Custom Request/Response and Custom Produce/Consume.
Figure 1. Communicaon, Serial protocol
Modbus RTU
By default the Communicator uses the Modbus RTU serial protocol.
The Communicator uses Modbus transacons dened by the Modbus standard.
The Communicator acts as a client on the subnetwork, and the serial communicaon takes place in a request/
response fashion.
The nodes on the network are not permied to issue messages unless they have been addressed by the
Communicator rst.
Custom Request/Response
In this mode, you can dene your own serial transacons to handle a wide range of custom serial protocols.
The Communicator acts as a generic serial client on the subnetwork.
The serial communicaon takes place in a request/response fashion.
Custom Produce/Consume
In this mode, you can dene your own serial transacons to handle a wide range of custom serial protocols.
The Communicator may consume and/or produce messages on the subnetwork.
There is no client-server relaonship between the nodes on the network, messages are spontaneously produced
or consumed when data is available.
Anybus
®
Communicator
™
- PROFIBUS to Modbus RTU/Serial About Anybus Communicator
Page 6 of 134 SCM-1202-177 1.2