Honeywell SmartVFD HVAC2 Applications Manual page 151

Output Frequency
1
P
Open Frequency Limit
P
Open delay
External Brake
Brake
closed
Relay open
1
= Open frequency Limit reached
3
= Brake opens ifExternal Brake :Current limitis exceeded .
Fig. 56. Starting / opening sequence with
external brake
Closing brake conditions:
Actual
Reference
2
3
Brake open
2
= Open delay elapsed
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 out-
put frequency goes below Close frequency
limit (P4.17) or Close frequency limit in
reverse (P4.18), depending on direction of
rotation.
Time
OR
2. Output current has gone below Current
limit.(P4.19)
Relay
closed
Digital inputs (Control panel:
Menu PAR -> P5)
These parameters are programmed using the
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.
151 31-00108—07