Apis Modbus Master

This module communicates with Modbus slave as a Modbus master using Modbus RTU or TCP

Provider: Prediktor

Commands And Events

The Modbus module has the following item types

HoldingRegister

More information

Quick Start Guide

Modbus Specifications and Implementation Guides

Characteristics of the Apis Modbus Master module:

Implements Modbus Master
Supports: Modbus TCP, Modbus RTU over TCP/IP and Modbus RTU (serial)
Support redundant slaves in TCP mode
Uses following Modbus function codes:
- 1 Read Coil status
- 2 Read Input status
- 3 Read Holding registers
- 4 Read Input registers
- 5 Force single Coil
- 6 Preset single Register
- 16 Preset multiple Registers
Supports following data types
- 2 byte signed int
- 4 byte signed int
- 2 byte unsigned int
- 4 byte unsigned int
- 8 byte unsigned int
- 4 byte float
- 8 byte float
- Unicode String
- ACSII String
Endianness
- Big-endian
- Little-endian
Bit numbering
- MSB..LSB
- LSB..MSB

Further, as an integrated module in the Apis Hive, the following optional features are available:

High performance data logging to the Apis Honeystore historian, with OPC Historical Data Access server interface