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With the easy-to-use Modbus function blocks, values can be read and written via Modbus TCP, Modbus UDP or Modbus RTU. In addition, Modbus RTU over TCP and Modbus RTU over UDP are supported.

Without purchasing a license (just download), the Universal Modbus Client Master SL runs for 30 minutes without functional limitations (demo).

HVAC Modbus Library. Send and receive Modbus data points via RTU (serial) or TCP. Finished function blocks many manufacturers and devices from building automation (www.hvac-automation.com).

Without purchasing a license (just download), the HVACLibrary SL runs for 30 minutes without functional limitations and disconnects automatically (demo).

The library allows the use of HVAC Modbus I/O modules of the manufacturer powerIO via a RS485 COM port. The devices are appended in the project tree and are parameterized from there without further programming effort. In the I/O Mapping area the assignments of the input/output variables can be set. The modules are available with emergency manual operation level and without. The status of the manual override is queried.