b_carlton
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sir actually i want only hint .... i know how to make ladder diagram , i make so many program .i have a analog module in my plc but now i want help from you people ...which is like that how to change frequency of the VFD (allen bradley powerflex 4m) from analog output module of PLC (rslogix 1500 Allen bradley ) by change analog input terminal of plc
actually till now i am changing my analog output voltage by change of analog input ....but now i want to know how i change frequency of VFD by proportion of change of analog input of plc