12/18/2021 10:26 AM | |
Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877) |
Hello mjrv, 1. How much is current capacity of motor module? Please check. 2. When drive trips? at start of motor, then possibly because of non-release of brake, which you can check by applying external supply to brake & confirm motor smooth rotation as well as operation of brake release micro switch (as you mentioned), if trips during broaching, please monitor current value. Moreover F7490 indicates enable signal is withdrawn during traversing. Please refer diagnostic & find out if any additional alarms are triggered. 3. You can go on line with STARTER & use trace feature, selecting alarm or fault triger condition which shall help you to trace probable fault/alarm cause like over current, over or under speed or torque limits or DC under voltage etc. etc. 4. Is this old running machine or new machine under commissioning? If old running machine, you need to find out overcurrent cause. If new machine under commissioning, check parameter p0205 i.e. power unit application duty selected, it should be 0. So during quick commissioning motor rated current & current limits are automatically set (you need not to worry about current limit setting). During operation check r0209[1] & [2] values from which you can conclude if current drawn is more than power unit value or rated motor current value. Hope this helps. |
12/20/2021 6:50 AM | |
Joined: 7/4/2014 Last visit: 8/9/2024 Posts: 283 Rating: (0) |
Hello Thanks for your details response, sorry for not having provided all the details earlier. 1. Single Motor Module 6SL3120-1TE24-5AA3 Output 3AC 400V 45A - so current capacity of motor module is 45A - is that correct & if that be so can we further increase motor overcurrent limit to 23A in PLC thro Modify option in the rung for Motor overcurrent - Kindly suggest (Motor used is 1PH7133-2FD02-6KB0, In(A) = 30) 2. Drive trips during broaching - actual to address quality issues of component, we have reoriented tool position & since then overcurrent issue started 3. We are using this machine since last 7 years but since last 18 months, thickness of component changed from 8mm to 10mm Regards
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1/11/2022 6:38 AM | |
Joined: 7/4/2014 Last visit: 8/9/2024 Posts: 283 Rating: (0) |
Dear Experts Request to refer to attached PLC program and following observations : 1. During operation, machine stops with error Motor Brake Micro switch fault as brake is applied and this error generated via input I7.0 and at the same time we also get error Ballscrew brake failed due to input I6.7 because machine has two brakes - one is internal with siemens 1PH7 motor and 2nd one is external with Ballscrew 2. We get above errors even if we apply emergency. 3. We are unable to conclude these errors are to due to overload because when we monitor M193.0, we dont find it getting set also actual current never found exceeding 19A both in PLC online as well as on HMI, earlier limit was 17.5A, gradually increased upto 26A also but our physical observation suggests that error due to overloading because we dont get error so frequently when depth of cut is less in other variant - but we are unable to conclude overloading 4. Kindly suggest if there is any standard bit to monitor why Drive enable is missing due to which brake is applied resulting into errors Motor Brake micro switch faulty, Ballscrew brake failed because when machine stops we get error on control unit of Sinamics S120 which means enable withdrawn during operation Regards
AttachmentNEWBroch.zip (533 Downloads) |
2/9/2022 10:50 AM | |
Joined: 7/4/2014 Last visit: 8/9/2024 Posts: 283 Rating: (0) |
Dear Experts Request to refer to attached backup of HMI (in V12) - please let us know tag for actual current in HMI, so that same can be modified in PLC, because although we have increased limit in PLC for M193.0(High current) to 25A, still , as seen on HMI, when current exceeds 18.8A, current sensing relay (which is monitoring brake current of siemens motor as well external brake on Ballscrew) trips. Warm Regards
AttachmentHMI Backup _ New Broaching.zip (503 Downloads) |
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