A
Modbus communications interface solution for Schneider Electric
Modbus is the common language used by all Modicon controllers. Modbus defines a message structure that
controllers will recognize and use, regardless of the type of networks
over which
they communicate. Modbus describes the process a controller uses to request
access to another device, how it will respond to requests from the
other devices, and how errors will be detected and reported. It establishes
a common format for the layout and contents of message fields. The
Modbus
protocol provides the internal standard that the Modicon controllers
use for parsing messages. During communications on a Modbus network,
the protocol determines how each controller will know its device address,
recognize a message addressed to it, determine the kind of action to
be taken, and extract any data or other information contained in the
message. If a reply is required, the controller will construct the
reply message and send it using Modbus protocol. On other networks, messages
containing Modbus protocol are imbedded into the frame or packet structure
that is used on the network. For example, Modicon network controllers
for Modbus Plus or MAP, with associated application software libraries
and drivers, provide conversion between the imbedded Modbus message
protocol
and the specific framing protocols those networks use to communicate
between their node devices.
Formal Driver Type: Serial, Client or Server
Connection type: RS-232 or RS-485
Devices Tested:
- Modbus RTU Devices
- Liebert Sitelink
- Square D Activar 58
- Triatek
- WonderWare InTouch
- Fix Intellution
- GE Cimplicity
- Modscan
- GE PLEPM
- ABB Extrel
- Andover Controls
- Eurotherm Chessel
- Magnatek
- Veris
- Sierra Monitor
