Thread safe MODBUS library MODBUS RTU protocol library, MODBUS serial ASCII. MODBUS Slave simulation functions as well Master and Client. The sole purpose of the presented driver is to write the setpoint(s) and to read the process value(s). Windows XP, Windows 7, Windows 2008, Windows 10, Linux, FreeBSD. The LabVIEW driver for the Mini8 controller using Modbus has been derived from the driver for the Eurotherm 3500 controller. The control unit in the example has 6 active control loops and is connected to COM1 at a baudrate of 19200. For example, a register name defined as 2 in a MODBUS configuration device translates to register address 1 in the Holding Registers table of the LabVIEW. This file also includes all supporting vis as well as additional samples.Īll these vis have been made with LabVIEW 8.5.1.
This vi shows how to use the driver vis with a Mini8 control unit with a number of setpoint/readout pairs. This vi (functional global) executes write actions. This vi (functional global) executes read actions.
When using the USB cable, a new COM port (typically COM4 or higher) will be available. at fixed time intervals repeat the previous 2 steps until some condition is met e.g. Start LabVIEW and select the MICRONOR example Vi named: ModBusMasterExampleMR330.vi Before running the program, select the appropriate COMx interface.for all write channels write the setpoint if it has changed.for all read channels read the process value.open the serial port to which the Mini8 controller has been connected.A MODBUS message sent from a master to a slave contains the address of the slave, the command (e.g. Is it possible to communicate with a device MODBUS TCP with the modbus libraries for labview I am using it succesfully with MODBUS RTU serial, but do. shows an example of a setup with 6 temperature controllers inside the control unit.Ĭommunication with a Eurotherm control unit works like this: MODBUS© Protocol is a messaging structure, widely used to establish master-slave communication between intelligent devices. With the provided demonstration program it should be easy to create some working program. It's easy to setup the connection between LabVIEW and your Eurotherm Mini8 control unit.