Emergency stop input:

When either or both of the SIL3/PLe STO inputs are activated the drive will turn off the power to the motor immediately. If the

load has any kind of momentum and/or high inertia it may continue to ‘free wheel’ which may not be desirable. For this reason

sometimes it is required for the drive to quickly decelerate the motor, in a controlled manner, before activating the STO function.

If you have a programmable drive (with the Mint memory module option +N8020) it is possible to configure a STOPINPUT on

the drive which can provide a means of quickly decelerating the drive. A contact from the system’s safety circuit that opens

instantly would be wired to the drive’s configured STOPINPUT. For a drive controlled via a Real-time Ethernet network it is

typical to connect this signal to the motion controller instead. Removal of the STO inputs would be delayed to allow the drive (or

motion controller) time to profile the axis to a controlled stop before finally disabling the motor output via the STO function.

Actual implementation must be determined by the user according to the result of a risk assessment performed on the system –

please refer to application note AN00206, available on the ABB motion support website, for further details