Hello! I have some questions about standard safety technology. I have a servo motor with a brake that will lift some load vertically. Can I use the STO function? What about the brake? Will the load fall to the floor? What other options would be more suitable than STO? SS1, SOS?
Hello,
The SafeMotion ACOPOS also controls the Break-Output via the Safety-Functions.
If the STO is in safe State, the Break-Output is also FALSE.
Especialy for vertical Axis it has to be considered if a Single Break is sufficient. I know for several Applications that the Coustomers had added a additional Break. At least in case Humans can get below the load.
The SafeMotion ACOPOS does provide a function for SafeBreak Test. It can be considiered to use this Test function to evaluate if the Break is still operational.
Disclaimer: The Safety Developer has to take care of the function of the SafeApplication!
Greetings
Michael
Hello @michael.bertsch,
first thank you for your answer.
What if I would be using non Safemotion Acopos and hardwired safety.
I am not understanding in this case if the brake is with STO aplied or not?
SBC as I am understading could be used if there would be safety gate and if SBC is in somekind of error I would not let the operator to enter. For now we have designed that light curtain is used so he can freely enter.
For the brake we are using gearbox with high ratio to release forces on motor - considering also motor with reinforced brake.
Greetings
Tobias
The default behavior for an axis is, that if the controller gets switched off (which happens during an STO) - error or not, the break automatically closes. I think it doesn’t really matter if we are talking about a SafeMOTION axis or not.
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In the Documentation of the STO its noting written about the Brake, but it will close the Brake with the Falling-Edge of STO. It could be the grey system doing this reaction.
Here is the SBC Description. If you need a Feedback of the SafeMC Safe Brake Control and a Lock, to prevent the release of the Brake, this will be the Function to go with, as far as i understood the Description.
Disclaimer: The Safety Developer has to take care of the function of the SafeApplication!
Greeting
Michael
I think i missed this point…
But my collegue actualy had the most importand point. Falling STO will trigger a close of brake. But on the “grey” ACOPOS its not locked. With a Brake command you can open it, even if STO is not released.
The 24V Supply of the Brake of a wired STO ACOPOSmulti is supplied via the Connector X1. Normaly we use a Wire to Bridge it to the Supply provided by the Acopos, but you can Supply it from an Safety Module and remove the Brake Suppy. For P3 the Brake Supply is internaly wired and does not provide this option.
I am not aware of the Safety-Level the external Supply would result in.
To have a real Safe Brake Control i think you should go with a SafeMC Acopos.
Disclaimer: The Safety Developer has to take care of the function of the SafeApplication!
Greetings
Michael