Honeywell SmartVFD HVAC2 Applications Manual page 150

External brake: Open delay
External brake: Open frequency
limit
External brake: Close frequency
limit
External brake: Close frequency
limit in reverse
External brake: Open / close
current limit
External brake control is used for controlling a
mechanical brake on the motor by digital / relay
output by selecting value 17 for parameters P8.1,
P8.2 or P8.3. Brake is closed while relay is open
and vice versa.
Opening brake conditions:
There are three different conditions for opening
the brake, all must be true, if used.
1. The Open frequency limit (P4.16) must be
reached.
2. When the Opening frequency limit has been
reached the Open delay (P4.15) must also
elapse. Note! The output frequency is held
at the Open frequency limit until this.
3. When the two previous conditions are
reached. The brake will open if the output
current is higher than the current
limit.(P4.19)
Notice that any of the previous conditions can be
left out by setting their values to zero.
150 31-00108—07