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AWT420 MODBUS Communications Supplement

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This communications supplement provides MODBUS® connection and configuration details for the AWT420 universal dual-input transmitter, along with comprehensive MODBUS reference tables. It covers RS485 MODBUS communications, data access function codes, input coils, holding registers, and diagnostic bit allocations for monitoring parameters such as pH, conductivity, dissolved oxygen, and turbidity in water/wastewater treatment.

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