What is Modbus?

Further information

n/a

Area of application

n/a

Medium

Wired & Wireless

Netzwerk Topologie

Bus, Point-to-point, Tree, Star, Ring

Supported transmission media

Twisted Pair, Fiber optics, Wireless mesh

Related standards (specific standards to which each protocol can be assigned.)

IEC 61158

Implemented security mechanisms

Modbus protocol itself does not include built-in encryption or authentication features (can be secured using other methods)

Bandwidth

RTU: 19.2 Kbps, TCP: 10/100/1000 Mbps

Frequency

Not applicable

Range

Varies significantly depending on network infrastructure

Devices (maximum number of devices that can be networked)

n/a

Data model architecture (data model in which the information/attributes are added to an object)

Registers & Coils

Discovery (Function to automatically identify devices on the network)

No

Multi Master (Can several master devices act at the same time?)

Abhängig von Implementierung

Packet size (data packet size that can be transmitted according to Maximum Transmission Unit)

n/a

Priority (how the changes/updates are made)

first-come-first-serve

Cost to enable hardware support for additional protocols (Low, Average, High)

n/a

Implemented OSI layers (Application, Presentation, Session, Transport, Network/Packet, Data Link, Physical)

Application layer

Levels of building automation (field level, automation level, management level)

Field level, Automation level

Link

https://www.Modbus.org/