How Connect speaks it
Section in preparation.
Typical equipment
Section in preparation.
Signals and mapping
Section in preparation.
Limits
Section in preparation.
Coexistence
Section in preparation.
Protocol supported by Captia Connect
Modbus in Captia Connect: register polling over TCP and over RTU on RS-485
The same register protocol over two transports: Ethernet for TCP and a multi-drop serial bus for RTU on RS-485. Connect polls the register maps at the configured frequency, applies per signal scaling factor and type, and timestamps every reading at the edge.
What it is and the role it plays
What is Modbus TCP and Modbus RTU / RS-485 and how does Captia Connect use it?
Modbus is a protocol for reading holding and input registers in a master/slave scheme, with no semantic model of its own, available over Ethernet (Modbus TCP) and over a multi-drop RS-485 serial bus (Modbus RTU). In Captia Connect it is an acquisition route: Connect polls the register maps at the configured frequency, applies per signal scaling factor and type, and timestamps every reading at the edge.
Related links
Continue from here
This page describes how Captia Connect speaks the protocol. The definition of the term, the topic guide and the engineering service that deploys it live elsewhere.
- Industrial data platform: Captia Connect and Captia.ai architecture
- Guide to taking Modbus data to the cloud without breaking the plant network
- PLC and plant equipment connectivity service
- Modbus definition in the industrial glossary