Reconstruction design and realization of automatic control system for multi-refrigerating machine sets paralleled
Abstract：The automatic control system based on S7-300 PLC was designed through investigation and analysis of multi-refrigerating machines paralleled in cigarette factory and upgrading and reformation of original control system were achieved.The monitoring picture for refrigerating machine sets was designed with the Siemens software WinCC for the upper computer,which supervised the local date collected by distributed I/O PLC and inner parameters of refrigerating machine collceted by gateway of Hilscher Company.It provided automatic control scheme to freezing-pumps and cooling-pumps with MM30 inverter,and it increased and decreased automatically the number of refrigerating machines to operation according to the range of cold load.Security and reliability were enhanced greatly,and elcctrical energy consumption was reduced far more than 30% after reformation.
Keywords：refrigerating machine setsPLCinternet automatic controlfieldbus
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 83-86 )