text: <s>[INST] all green leds are flashing on a Sercos interface 1756-M16SE module Summary: where are the drive error explanations and solutionsall green leds are flashing on a Sercos interface 1756-M16SE module. one axis has module fault 16 [/INST] Well, I'm not an expert on the matter...just found some info: When the SERCOS phase up process stops at phase 1 it usually indicates a duplicate node has been detected on the ring.The Node switches are only read on initial power-up of the devices that is on the SERCOS ring. If you change a switch setting, you must recycle power on the device to have it 're-read' the switches and produce the new node setting on the SERCOS ring. A collection of possibly useful technotes: https://rockwellautomation.custhelp.com/app/answers/detail/a_id/481307 https://rockwellautomation.custhelp.com/app/answers/detail/a_id/28596 https://rockwellautomation.custhelp.com/app/answers/detail/a_id/24213 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>