text: <s>[INST] PowerFlex 700S speed control I have a PowerFlex 700S firmware ver 4.002 Series:A and need to control motor speed using a 4-20mA analog input. I have successfully configured and run the drive using Par 14 - Preset Speed 1, encoder feedback, digital inputs 1 & 2 as Enable & Run, but I can't get the analog input to set the speed setpoint. I can see the analog input and a value in Par - 800 Anlg In1 Data, but the speed reference is not being written to Par - 40 Selected Spd Ref when I set Par 27 - Speed Ref A Sel to Spd Ref 1 and Par 28 - Speed Ref B Sel to Spd Ref 1. Can someone please explain what I need to configure to get analog input 1 as the speed reference? Can I use a 4-20mA signal with this drive, or does it require a 0-20mA signal? [/INST] EDIT: linkified for convenience -FL I think one thing missing here is to link the value of Analog Input 1 (parameter 800) to parameter 10 [Speed Ref 1]. This action is confirmed on Technical note https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/441489 On this specific drive, parameters can be linked easily via the HIM/display. There is a short example of how to link parameters available from page 157 of the October 2022 edition of the PowerFlex 700S High Performance AC Drive-Phase II Control Programmin manual. Please see link below: https://literature.rockwellautomation.com/idc/groups/literature/documents/pm/20d-pm001_-en-p.pdf There is also a more detailed configuration example of the Analog Input 1 available from page 15 of the 2011 edition of the PowerFlex 700S AC Drives Phase II Control Reference Manual. https://literature.rockwellautomation.com/idc/groups/literature/documents/rm/pflex-rm003_-en-e.pdf There might be required further fine adjustment of the scaling or offset, but I think after linking parameter 800 to parameter 10, the PF700S drive should start generating PWM waveform following the analogue input values. \\n </s>