Abstract
In this paper, the remote monitoring system of sewage source heat pump is designed and developed by using the scheme of PLC + configuration software. According to the technological process of sewage source heat pump system, the communication between PLC and heat pump unit and variable frequency water pump is realized by RS485 bus. The upper computer human-computer interaction software of sewage source heat pump control system is developed, and the system operation is realized. The functions of line data monitoring, remote control of units and transducers are tested and verified. The results show that the system can achieve the expected functions and run well.
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