ABB AN00250 Motion Control Products Tuning drives for servo motors using Mint Workbench

drive parameters dedicated to this function (these keywords all start with the text MOTORBRAKE). It’s important to consider

where the 24Vdc supply for the brake will come from. This should be from a separate isolated power supply from that which is

used to supply logical devices such as the drive control card, and other control equipment.

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

Motor thermal switch:

The motor may be supplied with a sensor/switch that either opens completely or provides a high impedance when the motor

temperature limit is reached. This should be wired directly to the dedicated motor temperature switch input (X10) on a MotiFlex

e180 drive. If using a MicroFlex e190 drive use of this temperature sensor is optional, but if it is used it should be wired using an

isolated 24Vdc supply (this can be the same supply used for a motor brake) and then included into the control scheme via an

intermediate relay, contacts of which can either be used to disable the drive in some way or fed into the MicroFlex e190 as an

input assigned to be the MOTORTEMPERATUREINPUT.