![]() You will need to download and install the OstroSoft Winsock Component on your computer.įor use with. ![]() Works with programming and scripting languages supporting COM. OSWINSCK.dll serves as a wrapper for the Winsock API and helps programmers to abstract from the complexity of API calls and focus on application functionality. Simply Modbus – Modbus TCP Winsock Component – Excel VBA Modbus TCP I will not go into the details of the communication protocol but here are some links to references: You can think of this as a letter being sent and Ethernet TCP/IP acts like an envelope for the Modbus Commands. Modbus TCP does not require a checksum calculation as lower layers already provide checksum protection. ![]() The Modbus TCP/IP or Modbus TCP is a protocol that is used for communications over TCP/IP networks. – Winsock API Calls for communication on network Sequence for Modbus TCP on Excel using VBA Previously we have used VB6 to communicate Modbus TCP. Reading ten registers in the PLC and displaying a bar graph in Excel. We will use Visual Basic for Applications (VBA) to communicate to a PLC using Modbus TCP protocol.
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