Beijer Electronics (formerly QSI Corporation)

Manufacturer of Mobile Data and Human Machine Interface Terminals.
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PostPosted: Fri Mar 03, 2006 10:31 am 
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Joined: Thu Mar 02, 2006 2:12 pm
Posts: 487
Location: Salt Lake City, Utah

How do I get started talking Modbus with Qlarity?


You first need the software to program a Qlarity-based terminal called Qlarity Foundry.

-Download Qlarity Foundry: ... l#software

Once you have installed and started Qlarity Foundry follow these steps:

-Start a new workspace. Select the type "Modbus(TM) serial RTU mode and Open Modbus(TMP)/TCP".

-Go to layout view by clicking the Layout View tab.

-In the Object Tree to your left select the object called ModbusComm.

-In the Object Properties window to the lower/right you can select the serial port or configure for Modbus TCP.

- (If you want to simulate the terminal on your PC) In the Tools menu select Settings and go to the simulation tab to setup your comport settings.

The first thing you should do is read a register from the Modbus slave device. You can do this with a MBRegister object.

-In the object palette in the upper/right select the icon called MBRegisterV2 and draw a box on the display.

-In the Object Tree select the object you just created called MBRegister_1. In the Object Properties window configure the object to read a register by setting the properties: plc, registertype, register, and vartype.

Run the workspace in simulation or download it to a terminal. By default the MBRegister object will query the modbus slave once per second.

For more information download the "Using Qlarity Based Terminals as a Modbus Master" application note:

Ron L.

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