text: <s>[INST] Ultra 3000 (2098-DSD-HV100-SE) Summary: Ultra 3000 (2098-DSD-HV100-SE) Losing home I have a sercos Ultra 3000 drive which is on the network with four other sercos ultra 3000 drives. I keep losing the home position during machine cycle and its random. Some times it will go the whole day without the home fault and some days its 2-3 time a day. I have check the main power as well as the aux power to the drive and it all checks out ok. I don't know why only one drive on the network will lose its home position. I did swap the drive with another on the network and the problem did not follow the drive. On one occasion I thought I saw the drive reset and power up during a mchine cycle while other did not??? [/INST] Try to have a look to Aid 46352 - Ultra 3000. Non-SERCOS. With an SRS or SRM absolute feedback encoder, the current position is lost after a power cycle. - fuzzy logic Please remember to Rate the Comments( ) to enhance the reputation of the User who provided help,or close your Topic using the ( ) button over the answer that solved it. Thanks... \\n </s>