About This File
This package contains the Plasmionique Modbus Master library for LabVIEW.
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
Other features include:
- Sharing a COM port across multiple Modbus sessions using VISA locks (10 second timeout).
- Sharing a Modbus session across multiple communication loops.
- TCP transaction ID handling to ensure that requests and responses are matched up correctly in case responses are received out of order.
- Modbus Comm Tester, available through the "Tools->Plasmionique" menu, for testing communication with a slave device without writing any code.
- Detailed help document available through the "Help->Plasmionique" menu.
Examples are included in "<LabVIEW>\examples\Plasmionique\MB Master\":
Download a copy of the user guide here: MB_Master - User Guide.pdf
Note that Version 1.3.4 of this library has been certified compatible with LabVIEW and has been released on the LabVIEW Tools Network: http://sine.ni.com/nips/cds/view/p/lang/en/nid/214230
The most recent version of this library will always be released on LAVA first before going through NI's certification process.
***This project is now available on GitHub: https://github.com/rfporter/Modbus-Master
What's New in Version V1.0.4 See changelog
Released
- Added dynamic dispatch accessor for Slave ID to MB_Master class.
- Changed type of RTU_DataBytes in MB_PDU_Cluster from U32 to I32
- Modified RX ADU.vi of MB_ADU_RTU class in order to have RTU support for function codes of unpredictable data length (24, 17, 12, 20, 21, 43).
- Added API for function code 43/14 (Read Device Identification)
- Added "MB_Master Simple Serial.vi" example
