text: <s>[INST] How increase OL Trip sensitivity on PowerFlex 4M Summary: Using drive w/ 3/4HP motor on conveyor; obstruction will trip OL but not before damage is done to conveyor.Need to find modification (hopefully drive parameter) to prevent damage to conveyor mechanism when obstruction blocks motion of conveyor. The goal is to automatically detect obstruction (high load) and stop the drive. Current system will stop for OL but is not sensitive/quick enough to prevent damage. I have some process flexibility to reduce torque or change speed if needed. Now using a Powerflex 4M drive w/ 3ph 3/4HP motor and gearbox to move conveyor. The normal operating load is very stable at 0.67-0.68 Amp. Setting P103 (motor OL current) to about 5% above nominal will stop motion, but it takes a few seconds to trip (too late). Have also tried A448 (sw current trip) but this trips quickly during the initial startup load unless setting is above 2.0 Amp. Can this be activated only after achieving speed? Other parameter settings that may help? [/INST] Duplicated topic. Here the one with replies: http://forums.rockwellautomation.com/comment/30485 - fuzzy logic In order to enhance the reputation of the Forum's contributors, please rate the replies you got and remember to close the thread clicking Choose as Best Answer button over the solving answer. Thanks ! \\n </s>