Excel Serial Communication Examples
Jun 13, 2016 In this Article: Install Software (Establish RS232 & DDE Communication) Bill Redirect Software (General Configuration) Bill Redirect Software (RS232 Serial Port configuration) Microsoft Excel (General Configuration) Excel Plugin Configuration Several Option Are Available Community Q&A References This tutorial explains how to establish a bidirectional real-time communication between. Reading Serial Port Data in VBA I'm having trouble getting code to read the incoming data send by a torque reader I'm working with. It sends a RS232 data stream which our current wedgelink software can be set up to translate it into key presses and then exported to excel. For example, a timer can be used to poll the serial port using GetNumBytes(). When the number of bytes reaches a certain value, the data can be removed from the serial port. For more info give me an E-mail address and I will send a sample application.
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If you are interested in developing a Modbus Master application, here are some programs that I wrote that you can extract code from. Note that VB 6.0 is obsolete, but you might still have a compiler. VB2010 Express is available as a (for evaluation purposes) from Microsoft. VB2013 is also available. VB 6.0 This link takes you to a topic discussing the Encorp GPC controller and how I wrote some code to program that controller using Modbus rather than using the Lonworks protocol (which required a converter box). The VB 6.0 source code is included in that topic. VB 2010 Express Here's an example located elsewhere on this board of a program that I wrote to demonstrate INCOM pass-through using Modbus RTU.
Excel Serial Communication Example
Serial Communication Example
Embedded within this code is an example of how to write Modbus commands to read and write tables of registers. This topic also includes a link where you can download the Modbus source code I used to create a stand-alone Eaton Automatic Transfer Switch setpoint editor. Note that while this example is somewhat complex (I wrote code that embedded INCOM messages within Modbus packets which were decoded by a Modbus MINT and transmitted as INCOM messages to an ATC-600 or 800 transfer switch controller), it shows how to write VB2010 code to send and receive Modbus RTU messages via the COM serial ports. Visual Basic for Applications - VBA (Excel 2010) VB and VBA have different syntax. Neither of the VB programs above could be imported into Excel's VBA scripting language and work.