Notes; Mechanical Brake Control - ABB ACS880 Series User Manual

Index Name
92.02 Encoder 1 source
92.10 Pulses/revolution
92.17 Accepted pulse freq
of encoder 1
￭

Notes

ACS880-07/17/37 and ACS880-17LC/37LC drives with option +Q978: In motor
overtemperature situations, the FSO module also opens the main contactor/circuit breaker.
ACS880-07/17/37 and ACS880-17LC/37LC drives with option +Q978 or +Q979: The FSO
module is configured so that after the safety function activation, the user must reset the
FSO module manually with the emergency stop reset button. The user must also reset the
FSO module with the emergency stop reset button after motor overtemperature situations.
The indication lamp on the reset button is on. Do not change this setting.

Mechanical brake control

If you use a mechanical brake with the motor thermal protection circuit, pay special attention
to the control of the mechanical brake.
If the motor deceleration by the mechanical brake causes extra heat generation in the Ex
zone, make sure that the use of the brake does not increase the temperature too much. In
this case, make sure that the mechanical brake is activated only at zero speed (see
parameters SBC.11,
In some cases you cannot use the brake for the motor deceleration when the motor thermal
protection circuit has tripped and the motor temperature is too high.
For more information, see the drive firmware manual (or the FSO module user's manual if
you use the Safe brake control (SBC) function of the FSO module).
Example value
Module 1
2048
300 kHz
SBC.15 and FSOGEN.51
Description
Sets the safety pulse encoder interface module that
the safety pulse encoder 1 is connected to.
Sets the number of HTL pulses per revolution for safety
pulse encoder 1.
Adjust the default value to meet the safety pulse en-
coder in use. Make sure that the value is according to
the encoder nameplate.
Sets the maximum pulse frequency range of encoder
1. Adjust the default value to meet the motor and safety
pulse encoder in use. You can use this formula to define
the value: r_max · ppr_enc + 10%, where
• r_max: the maximum motor speed (rpm) used in the
application (or the motor nominal speed)
• ppr_enc: pulses/revolution of the safety pulse en-
coder (parameter 92.10).
or FSOGEN.52).
Parameter settings 51