S7NetCom by Hampel Software Engineering - Toolkit for LabVIEW Download

An open-source communication driver for talking to Siemens S7 PLCs via TCP/IP implemented in plain LabVIEW TCP/IP primitives. The original source code was shared by Marc Christenson on NI's Example Program Code Exchange forum (link in the readme).

This is a reference implementation that has NOT been vetted for a production setting. It might or might not meet traditional requirements in terms of uptime, security, absence of bugs, etc. Use at your own risk!

The HSE Dokuwiki holds more information on the protocol and these VIs:
https://dokuwiki.hampel-soft.com/code/open-source/s7netcom
https://dokuwiki.hampel-soft.com/kb/production/s7-communication