node-red-contrib-haiwell

Node-RED custom nodes for Haiwell PLC Modbus Communication

NOTE: This package is based on and forked from node-red-contrib-modbus version 5.40.0. It has been heavily customized and optimized to seamlessly integrate with Haiwell PLC addressing (such as X, Y, M, T, C, S components for Bits, and V, TV, CV, SV for Words) without requiring manual offset calculations.

Features

• Haiwell Read Bit: Read X, Y, M, T, C, SM, S bit components directly by name and address.
• Haiwell Read Word: Read V, TV, CV, SV word components directly by name and address.
• Modbus Write: Write components to the PLC seamlessly.
• Includes all standard features from the original node-red-contrib-modbus such as Modbus TCP and Serial, flex nodes, and queueing.

Installation

Install directly from your Node-RED directory:

npm install @ismaillowkey/node-red-contrib-haiwell

Usage

After installation, the new nodes will appear in your Node-RED palette under the Modbus section:

• Haiwell Read Bit: Select your component (X, Y, M, T, C, SM, S) and enter the address. The node automatically calculates the correct Modbus offset and reads the bits.
• Haiwell Read Word: Select your component (V, TV, CV, SV) and enter the address. The node automatically calculates the correct Modbus offset and returns the value based on your selected data type.

Authors

Created/Modified by ismaillowkey. Based on the original architecture by Bianco Royal / Klaus Landsdorf.