PLC and SCADA Integration of USB Data Loggers Using Smart-Hub Many industrial monitoring systems already use PLCs, HMIs, or SCADA software as the main supervisory platform. At the same time, standalone USB data loggers may already be installed for temperature, voltage, current, humidity, pulse, state, or other measurements.Microedge Smart-Hub provides a practical way to connect supported USB data loggers to an Ethernet network and make their real-time measurements available to industrial systems through Modbus TCP.This Application Note shows how a USB data logger can be integrated into a PLC or SCADA system using Smart-Hub as a communication gateway. 1. Application A typical application may already include one or more USB data loggers installed close to sensors or equipment.Examples include:Temperature monitoring4–20 mA process transmittersVoltage monitoringRelative humidityEquipment state monitoringPulse or event countingLaboratory or test-system measurementsThe customer may want these measurements to become available to an existing:PLCHMISCADA systemIndustrial PCBuilding-management systemCustom Modbus TCP applicationInstead of replacing the USB data loggers, they can be connecte...
