text: <s>[INST] PF755 Increment /Decrement Speed using 0-10V Hi , Is it possible to increment the PF755 speed in fixed amount using a 0-10V or -10V to 10V i.e if the drive receives 10V it will increment the speed by 2Hz and if it receives -10V the speed will decrement by 2Hz . I know it is possible using DI assignment but PF755 has only one input and that input is assigned to Run and dont have a seprate I/O card . Also since it is standalone VFD control over ethernet is not possible . We have a spring return Selector Switch which if turned in one Direction speed should increment by 2Hz and if it turned to another it should decrease by 2Hz. Can i connect a analog input to the drive through this such that drive receives +/-10V and accordingly increment/decrement speed by 2Hz [/INST] Hello, as pointed out on your initial post, the implementation of that application requirement would be possible configuring the MOP (Motor Operated Potentiometer) feature of the PowerFlex 755 with the help of 2 digital inputs. In the scenario presented, it looks like there are not spare inputs available to be used, so the straight forward implementation of the MOP feature will not be possible. To my knowledge, based on the MOP block diagram below, there is no indication that the switching of a +/- 10V analogue input will be triggering the 2Hz increase or decrease sought after on this application. More information on the MOP feature is available via chapter 6 of PowerFlex 750-Series AC Drives, Reference Manual Another possibility could be exploring if some sort of drive embedded DeviceLogix code could be implemented to mimic the MOP functionality of the MOP block diagram above. As any code creation task, this could be a time consuming exercise that may pose a challenge on its own, due to the real possibility of non being able to manipulate or access certain signals/registers on the drive via DeviceLogix. \\n </s>