•
•
•
Torque limit
ID349
Frequency limit
ID347
START
STOP
Brake-off
delay;
ID352
Brake-on delay;
ID352
Brake off
Brake on
e
3
0
b
h
0
8
4
.1
0
Illustration 97: Brake Control with Additional Limits
In 21 above, the brake control is set to react to both the torque supervision limit (parameter
ID 349
) and frequency supervision limit
(
ID 347
). Also, the same frequency limit is used for both brake-off and brake-on control by giving parameter
ID 346
the value 4. Use
of two different frequency limits is also possible. Then parameters
ID 315
and
ID 346
must be given the value 3.
Brake-off: In order for the brake to release, three conditions must be fulfilled:
drive must be in Run state
the torque must be over the set limit (if used)
the output frequency must be over the set limit (if used)
Brake-on: Stop command activates the brake delay count and the brake is closed when the output frequency falls below the set
limit (
ID 315
or
ID 346
). As a precaution, the brake closes when the brake-on delay expires, at the latest.
A fault or Stop state closes the brake immediately without a delay.
It is recommended that the brake-on delay is set longer than the ramp time to avoid damaging of the brake.
AB296635287482en-000301 / DPD00903 | 307
Danfoss A/S © 2023.02
Parameter Descriptions
VACON® NX All-in-One
Application Guide
Содержание VACON NX
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