Open Frequency Limit
Open frequency Limit reached
Brake opens if
:Current limitis exceeded .
Fig. 56. Starting / opening sequence with external brake
Closing brake conditions:
There are 2 conditions for closing the brake again. It's enough that one
is true for the brake to close.
1. If there is no run command active and output frequency goes be-
low Close frequency limit (P4.17) or Close frequency limit in reverse
(P4.18), depending on direction of rotation.
2. Output current has gone below Current limit (P4.19)
Application manual HVAC232/402 | Document 27-652 | Issue ENG06 | 2019-08-07
Open delay elapsed
(Control panel: Menu PAR
These parameters are programmed using the Closing brake conditions:
FTT-method (Function To Terminal), where you have a fixed input or output
that you define a certain function for. You can also define more than one
function to a digital input, e.g. Start signal 1 and Preset Speed B1 to DI1.
The selections for these parameters are:
I/O ctrl signal 1
I/O ctrl signal 2
P5.1 and P5.2 : See P2.4 (I/O start stop logic) for function
The digital input only active when P2.4 (I/O start stop logic)=1.
The motor will run in reverse when the rising edge of P5.3 is happened.