KOMUNIKASI ANTARMUKA PROGRAMABLE LOGIC CONTROLLER PADA MODBUS RTU SENSOR SUHU DAN KELEMBABAN UDARA DENGAN DATALOGGER

Abstract

This study discusses systems that are widely used in industry to connect communications with equipment used by Programmable Logic Controllers (PLC). Communication methods that exist in the industry generally use two methods, namely Modbus RTU and TCP/IP. In this study, the Modbus RTU method is used to form Master and Slave components. Communication between Master and Slave uses RS485 serial communication, and the basic function of the Modbus protocol is a temperature and humidity sensor type XY-MD02 SHT20 which will be stored in the data logger to be able to store temperature and humidity data as a result of implementation in the Object Datalogger PLC Software. in order to obtain temperature and humidity data according to the address that has been given by testing data sampling for 1 minute the results obtained by the communication system can work properly, then based on the data by the datalogger using the Object Datalogger Software on the Built-In Equipment PLC, an average temperature is produced 29.77° Celsius and humidity 73.88 % RH.