Technical Description; Modbus Tcp - ABB PSE Manual

2 Technical Description

The following list highlights the core features and functionalities provided by the MTQ22-FBP and Modbus TCP
protocol.
Highlighted Features

The MTQ22-FBP Ethernet adapter module provides Ethernet connectivity for the ABB PSE softstarter
Fieldbus plug (FBP) device.

Up to four FBP devices can be connected to one MTQ22-FBP. This allows a very cost-efficient
connection of FBP devices to Ethernet.

Through the MTQ22-FBP Ethernet Adapter module it is possible to:
o
Give control commands to the device (Start, Stop, Set Auto Mode, etc.)
o
Read status information and actual values from the device
o
Read maintenance counters
o
Reset a trip

A built in two-port switch allows the flexible usage in bus, star or ring network topologies.

Up to four masters can concurrently access the connected devices.

Access via Modbus TCP can be restricted to a limited set of IP addresses.

The Media Redundancy Protocol (MRP) is implemented (client). MRP is standardized in IEC/EN
62439-2 and offers cable redundancy in case of a single failure.

2.1 Modbus TCP

Modbus TCP is a variant of the Modbus family of simple, vendor neutral communication protocols intended for
supervision and control of automation equipment. Specifically, it covers the use of Modbus messaging over TCP
connections on an IP network.
The implementation of the Modbus TCP server in the MTQ22-FBP module is done according to:

Modbus Application Protocol Specification v1.1b

Modbus Messaging on TCP/IP Implementation Guide v1.0b
The supported Modbus commands can be found in chapter 4. Further information on the Modbus TCP protocol
is available at www.modbus.org.
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