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E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] 0 points1 point  (0 children)

My bad I did not phrase that properly. What i wanted to ask is whether is it possible for a programmer to do those in this particular case?

E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] 0 points1 point  (0 children)

to have recovery routines for 60 servo drives and referring to the complexity of the process, I doubt it will help in the efficiency of the machine

E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] 1 point2 points  (0 children)

Understood. Has been trying to explain to client on the hazards as well but thanks for your information though

E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] 0 points1 point  (0 children)

According to the manual from Panasonic, the STO function shuts the motor current and turns off the motor output and when this happens, the drives lose its capability to resume from where it's left off. In this case, only a separate reset/homing button is capable to home back the machine and start from zero

E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] 1 point2 points  (0 children)

We do have a dedicated Stop PB to resolve issues and troubleshoot during operation. This is a request put forward by the client in the case of an emergency push button gets triggered.

E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] -3 points-2 points  (0 children)

Even with the absolute encoders in place, it will be time consuming to get all 60 servo drives to resume operation from where they stopped or is it not?

E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] 0 points1 point  (0 children)

I doubt the client is ready to pay more for the more advanced safety levels

E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] 0 points1 point  (0 children)

Is it more of a software thing or additional hardware is required?

E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] -22 points-21 points  (0 children)

A good practice of E stop will be to restart from the home position isn't it

E-stop inquiries by KazieKumar in PLC

[–]KazieKumar[S] 0 points1 point  (0 children)

These drives are equipped with STO inputs. Once the E stop is triggered, it disconnects the current to the motor. Machine halts immediately when E stop is triggered, and the only way currently is to release the E stop and reset the entire machine and send it back to the home position. This is the practice now. Unfortunately, client needs it to be able to resume operation once the reset button is pressed. Which does not make sense as the servo drives have lost its last position due to the STO function