text: <s>[INST] Where can I find the documents about the configuration for PF755 Point to Point application My system is a lifter controlled by PF755. In this system, there is one 20-750-ENC-1 on VFD port 4 and one 20-750_UFB-1 on VFD port 5. First, I configure 'Port 4:Encoder Feedback' as velocity feedback(Parameter:125) and 'Port 5:FB0 Position' as position feedback (Parameter:135). Secondly, I configre mode to 'Psn PTP' through patameter 309~313. Some other parameters about PTP are as following 770: All zero(Default) 771: Absolute(Default) 772: It's conncet to one DOP bit from DeviceLogix. It will be true when VFD recieve move command from PLC. 775: Port 0: PTP Setpoint (Parameter 780). Parameter 780 is associated to Datalink 1 which is the target position from PLC. When I try to raise the lifter, it cannot reach the target position. 'PTP Setpoint'(780) is right, it's the same to the tartget position from PLC. But 'PTP Command'(784) is less than the target position. And I saw the motor is running forward and reverse continually. Later, VFD will result in fault 64(drive overload). I don't know what's the problem. Maybe there are some parameters are not configured OK now. Where can I find some reference documents for it. Thanks. [/INST] Ensure that upon starting the application Parameter 780, PTP Setpoint, is equal to Parameter 847, Position Feedback. If this is not the case, the PTP Command will always be offset by the difference between Position Feedback and PTP Setpoint. In order to alleviate this issue: Set Parameter 309 to speed mode Set Parameter 780 equal to Parameter 847 Set Parameter 309 back to PTP Positioning Increment/decrement Parameter 780 as needed for the application. http://literature.rockwellautomation.com/idc/groups/literature/documents/pm/750-pm001_-en-p.pdf http://literature.rockwellautomation.com/idc/groups/literature/documents/td/750-td001_-en-p.pdf \\n </s>