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  6. 4.2.5 RS-485 (Modbus RTU)

4.2.5 RS-485 (Modbus RTU)

The SmartSampler2 supports integration of Modbus RTU-compatible sensors via the RS-485 interface. Configuration is done using the built-in GUI and flexible parsing rules to extract values from sensor responses.


Overview

  • Protocol: Modbus RTU
  • Function codes: Supported via manual polling (currently fixed to 0x03 – Read Holding Registers)
  • Transport: RS-485, half-duplex
  • Live Reading: ON/OFF toggle for periodic polling of configured sensors
  • Multi-register support: Handles multi-variable sensors within one device
  • Custom parsing: Extract and decode values with flexible configuration strings

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