Many brothers on site have asked this question: "The reset button is almost pressed broken, why is it still lit?" The root is generally just one: those safety conditions triggering STOP A have not gathered together yet. Although you turned the emergency stop up, the safety relay didn't reset; the safety door is closed, but the door open-close signal didn't return; STO signal didn't restore; safety PLC is still in fault state; or the system requires doing a safety confirmation again, and the operator didn't execute it. At this time you only pressing a reset, equals telling the drive "you try again then". The drive checks, okay then, safety conditions still are not satisfied, so it continues executing STOP A. Therefore, connecting back those links that dropped chain on the safety chain, is much more useful than wrestling against the reset button.
Truly When It's My Turn to Go to Site Myself, Generally I Will Touch According to Such a Route
Running into F01600, I am used to first checking from the safety devices outside the equipment. Seeing if there is an emergency stop button not turned into place, if safety doors are all closed tight, if light curtains are blocked, and if other safety switches on the equipment have abnormalities. Once these are all normal, then go peep at the status of safety relays or safety PLC. For systems using SINAMICS Safety Integrated, next confirm whether STO signal restored or not. If going through PROFIsafe, synchronously check safety communication and fail-safe I/O diagnostic information. Finally return back to SINAMICS drive itself, call out the alarm history, confirming whether before F01600, there were still other safety alarms that occurred. Flipping down this set of somersaults, is often much faster than directly changing the drive.
There is also a pit easy to be ignored: the equipment was always good before, and suddenly gave F1600, you really must recall if recently you moved something. For example changed emergency stop button? Modified safety door? Changed safety relay? Moved PLC program? Adjusted STO wiring? Or changed drive or control unit? If one item hit, then safety parameters and safety signal configuration must receive key care. Especially after finishing changing SINAMICS control unit, if Safety Integrated related configuration isn't restored well, the equipment very likely cannot pass the hurdle of safety checking.
Will This F01600 Burn My Siemens Drive?
Rest assured, generally no. F01600 essentially is a safety protection response, not the power module being broken. The purpose of STOP A is precisely to unload motor torque in time, preventing the equipment from continuing to move. Therefore, occasionally popping once F01600, does not represent that your SINAMICS drive is hung up (dead). But if the equipment every two or three days for no reason gives F01600, you cannot every time just reset and call it finished. Repeated safety stops often imply there are invisible troubles of poor contact inside the safety circuit: for example safety door switch contacts unstable, STO circuit wiring loose, safety relay contacts aging, safety PLC input signals sporadically losing. These problems don't necessarily directly break the drive, but that kind of signless stop caused can drive the production department crazy.
F01600 and Those Overcurrent, Overheating Alarms, Checking Methods Are Completely Two Separate Tracks
When troubleshooting for SINAMICS drive, thousands of times do distinguish F01600 from alarms like overcurrent, overvoltage, encoder fault. Overcurrent alarms, you generally think towards motor, cable, load, power module; encoder alarms, then check encoder, feedback line, feedback interface. But F01600's troubleshooting starting point must be Safety Integrated safety system. That is to say, seeing F01600, don't first stare at motor and module, first check emergency stop → safety door → safety relay → safety PLC → STO → Safety Integrated → drive, smoothing down like this, then it is easier to catch the true problem.
Normally Keep a Few More Minds Open, F01600 Can Less Add Trouble for You
F01600 itself doesn't need you to periodically go "maintain", but the safety chain behind it really has to be watched often. When doing daily maintenance of equipment, in passing try if the emergency stop button is responsive or not, if the safety door switch is loose or not, if the safety relay contacts turned black or not, if related wiring is firm or not. Guarantee the STO terminals inside the cabinet don't get shaken loose due to long-term vibration, if the equipment used safety PLC and PROFIsafe, periodically aiming a glance at safety diagnostic information is also a good habit. Especially after equipment retrofitting, best to reconfirm Safety Integrated configuration and safety functions once again, don't be lazy and continue using old settings. For CNC machine tools and automation production lines running continuously around the clock, the time you spend on these checks, compared with the loss caused by an accidental stop, is simply not worth mentioning.
Then When Is It Really Time to Suspect the SINAMICS Drive Itself?
If you have already checked the emergency stop system, safety door, light curtain, safety relay, safety PLC, STO signal, PROFIsafe status, safety configuration all down to the bottom, confirming not a single flaw exists, but F01600 still stubbornly pops outward, only then has it reached the time to further dig deep into SINAMICS control unit or Safety Integrated related hardware and configuration. You can check control unit diagnostic information, Safety Integrated parameters, related drive component status again. If on site it really cannot be diagnosed, sending the drive to professional maintenance over there to run on a test bench, is also a way. Some old CNC equipment discontinued for many years, directly buying a new drive cost is too high, at this kind of time testing and repairing the existing SINAMICS module, is often more cost-effective.
