We have a couple of S120 drives which are rack pinion system,which moves forward and back ward (linear motion only) . The drive shows Fault 7900 3 times per shift or sometimes more. The drive is commissioned for 6 -7 months. As per operator, it happens only during forward movements. What should I check. I checked the help file and it says to check below. I have increased the motor locked time but still the fault still comes up. Kindly advice