Modbus Master by Plasmionique Inc. Open-Source Modbus Master Library
- Supports ASCII and RTU modes
- Supports serial and TCP/IP networks
- Multiple masters can share serial ports
- Single master can communicate with multiple slaves
- Includes Modbus tester example for verifying communication with slave devices
- Includes documentation and example code
- Download
The Plasmionique Modbus Master Library is an open-source add-on package for LabVIEW. It implements the Modbus Application Protocol Specification V1.1b3 for communicating with Modbus devices (slaves) over Asynchronous Serial or TCP/IP networks. Plasmionique Inc. developed it to replace NI’s Modbus V1.2.1 and provide an open source alternative to the Modbus API released by NI labs.
It supports RTU, ASCII, and TCP modes with the following function codes:
0x01 - Read Coils
0x02 - Read Discrete Inputs
0x03 - Read Holding Registers
0x04 - Read Input Registers
0x05 - Write Single Coil
0x06 - Write Single Register
0x07 - Read Exception Status
0x0F - Write Multiple Coils
0x10 - Write Multiple Registers
0x16 - Mask Write Register
0x17 - Read/Write Multiple Registers
0x2B/0x0E - Read Device Identification
The Plasmionique Modbus Master Library supports sharing a COM port across multiple Modbus sessions using VISA locks (10-second timeout).
It also supports sharing a Modbus session across multiple communication loops using a DVR as a mutex.
Support Information
This product is supported by the third-party provider and not by NI. For more information, contact Plasmionique at:
Website: plasmionique.com
Disclaimer: The Third-Party Add-Ons for LabVIEW on this page are offered by independent third-party providers who are solely responsible for these products. NI has no responsibility whatsoever for the performance, product descriptions, specifications, referenced content, or any and all claims or representations of these third-party providers. NI makes no warranty whatsoever, neither express nor implied, with respect to the goods, the referenced contents, or any and all claims or representations of the third-party providers.
It supports RTU, ASCII, and TCP modes with the following function codes:
0x01 - Read Coils
0x02 - Read Discrete Inputs
0x03 - Read Holding Registers
0x04 - Read Input Registers
0x05 - Write Single Coil
0x06 - Write Single Register
0x07 - Read Exception Status
0x0F - Write Multiple Coils
0x10 - Write Multiple Registers
0x16 - Mask Write Register
0x17 - Read/Write Multiple Registers
0x2B/0x0E - Read Device Identification
The Plasmionique Modbus Master Library supports sharing a COM port across multiple Modbus sessions using VISA locks (10-second timeout).
It also supports sharing a Modbus session across multiple communication loops using a DVR as a mutex.
Support Information
This product is supported by the third-party provider and not by NI. For more information, contact Plasmionique at:
Website: plasmionique.com
Disclaimer: The Third-Party Add-Ons for LabVIEW on this page are offered by independent third-party providers who are solely responsible for these products. NI has no responsibility whatsoever for the performance, product descriptions, specifications, referenced content, or any and all claims or representations of these third-party providers. NI makes no warranty whatsoever, neither express nor implied, with respect to the goods, the referenced contents, or any and all claims or representations of the third-party providers.