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    How to set up plus + and minus - speeds on the Altivar 312 (and Altivar 31) drives

    Issue:
    How to set up plus and minus speeds on the Altivar 31/312 drives

    Product Line:
    ATV31 and ATV312

    Environment:
    All serial numbers for ATV31 and ATV312

    Cause:
    If using a momentary push button to increase/decrease speed

    Resolution:
    Set up the drive as follows:
    Wire one side of the switch to the +24v terminal and the other side of the minus switch to a logic input (example LI5)
    Wire one side of the switch to the +24v terminal and  the other side of the plus switch to a logic input (example LI6) 
    Then program the drive as follows:
    CTL menu
    LAC set to 2 or 3
    RFC Ref 2 switching set to Ch2 active
    FR2 Ref 2 channel set to UPdt + and - speed control.
    FUn menu
    UPd + /- speeds
    USP= + speed input for LI5 or you can choose your logic input assignment.
    dSP= - speed input for LI6 or you can choose your logic input assignment.

    Note: Conflicting functions need to be de-activated.  Set PS2 = PS4 = JOG = SA2 =  nO

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