9/22/2009 6:07 PM | |
Posts: 81 Rating: (1) |
hi all, i wana know if it s possible to change frequency using analog output of PLC(s7-300) , using analog inputs of MM420.
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9/23/2009 9:34 AM | |
Joined: 5/28/2008 Last visit: 10/12/2024 Posts: 4515 Rating: (839) |
Dear sirm Of corse yes, you can control the frequency of a drive MM420 via Analog signals. MM420 has an integrated AI channel (0-10V or 0-20mA) Here's attached the circuit diagram of the MM420. Please connect the AO signal of PLC into the AI signal of MM420 as mentioned in the attached circuit diagram and then put the following parameters: P0700 = 2 "Selection of Command source = terminals" P1000 = 2 "Selection of frequency setpoint = Analog" Then if you have selected 0-10V as AI of drive. For 0V signal, the frequency setpoint would be 0Hz. For 10V signal the frequency setpoint would be equal P2000 (ref. frequency) if and only if P2000 =< P1082. Regards, AttachmentENG_86799.pdf (998 Downloads) |
Ayman Elotaify |
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This contribution was helpful to1 thankful Users |
9/25/2009 3:20 PM | |
Joined: 5/28/2008 Last visit: 10/12/2024 Posts: 4515 Rating: (839) |
Hello mef3000, |
Ayman Elotaify |
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This contribution was helpful to1 thankful Users |
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