gefran ADV200 Functions Description And Parameters List page 135

parameter 3176 Brake open spd thr (and in any case not before a time equal to PAR 3172 Brake open de-
lay, which is always measured from the moment the brake opens) the pre-torque value injected (Brake open
thr mon) after opening is reset to 0 with a ramping down time that is always equal to the value of 3188 Brake
torque time.
In the transient opening phase the "positioner" could generate a speed reference value that is higher than the
"Brake open spd thr" threshold. This, in turn, could result in the removal of the pre-torque due to the incorrect
assumption that a positioner has started. To prevent this, parameter 3172 Brake open delay can be set so that
the comparison with the speed reference is only performed after a certain delay.
In this mode the "Brake fault" alarm can never be triggered as it is not envisaged in "Hoist mode 2".
Closing phase:
When the drive is disabled (also due to any alarms that are capable of disabling it) a close brake command is
sent immediately, regardless of the operating condition.
For normal closing, set parameters 3174, 3178 and 3190.
When the brake opening phase is complete and after a delay equal to at least the value of 3190 Brake close
wait (measured from the moment pre-torque removal ends) it waits for the speed reference to fall below the
value set in 3178 Brake close spd thr.
Parameter 3174 Brake close delay can be used to enter a delay between the moment the closing condition
occurs and that in which the close command is actually sent by the drive.
After the brake closing condition has occurred (within the time set in Brake close delay) it is also possible to
restart the drive by sending a new positioning command. In that case the timer is reset and the drive waits for
the closing condition again, which occurs when the speed reference falls to below the value of Brake close
spd thr and after the delay set in Brake close wait.
Parameter 3190 Brake close wait can thus reasonably be set to a value that is slightly less than the position-
ing time. It ensures that within the set time the speed reference can also fall below the Brake close spd thr
value without the close command being sent.
Menu PAR Description
22.13.2 3172 Brake open delay
Setting of the delay for opening an external mechanical brake.
Menu PAR Description
22.13.3 3174 Brake close delay
Setting of the delay to reach the motor zero speed before closing the brake.
Menu PAR Description
22.13.4 3176 Brake open spd thr
Setting of the brake opening speed threshold value.
Menu PAR Description
22.13.5 3178 Brake close spd thr
Setting of the brake closing speed threshold value.
Menu PAR Description
22.13.6 3182 Brake open thr sel
Selecting of the type of comparison between the threshold value of open brake torque and the torque value or
output current of the drive.
0 Torque ref%
1 Output curr
Menu PAR Description
22.13.7 3184 Brake open thr
Threshold value at which the comparison is made.
ADV200 • Functions description and parameters list
UM Type FB BIT
s FLOAT
UM Type FB BIT
s FLOAT
UM Type FB BIT
rpm INT16
UM Type FB BIT
rpm INT16
UM Type FB BIT
ENUM
UM Type FB BIT
perc FLOAT
Def Min
0.20 0.0
Def Min
0.20 0.0
Def Min
0 0
Def Min
0 0
Def Min
Output curr 0
Def Min
10 -200.0
Max Acc Mod
60.0 ERW FVS
Max Acc Mod
60.0 ERW FVS
Max Acc Mod
CALCI ERW FVS
Max Acc Mod
CALCI ERW FVS
Max Acc Mod
1 ERWZ FVS
Max Acc Mod
200.0 ERWZS FVS
135