Mechanical brake contr.
Group 67 Mechanical brake contr.
The Range/Unit column in the table below shows the allowable parameter values. The text following the table explains the parameters in detail.
Parameter
Range/unit
Description
Brake falling time 2 BRAKE FLT TD
1 BRAKE FALL TIME
0.0 ... 60.0 s
Brake fault time delay 4 BRAKE REOPEN TD
0.0 ... 60.0 s
Brake reopen time delay 5 BRAKE LONG FT TD
0.0 … 60.0 s
Brake long falling time delay 6 ZERO SPEED LEV
0.0 ... 60.0 s
Zero speed level 7 ZERO SPEED TIME
Zero speed time 8 SPEED REF TD
0 ...1000 ms
Speed reference time delay 9 START TORQ SEL
0.01 ... 10.00 s
NOT USED; AUTO TQ Starting torque selector MEM; LOAD MEAS; PAR 67.10
10 START TORQ REF
Start torque reference 11 MOTOR TYPE
STANDARD; CONICAL Conical motor function selector 12 RED FLUX LEVEL
Reduced flux level 13 START FLUX LEVEL
Start flux level 14 START FLUX TIME
0.0 ...10.0 s
Start flux duration
1 BRAKE FALL TIME
Falling time for the mechanical brake. Time for brake to set and give full braking torque after brake close order (brake electrical supply disconnected).
2 BRAKE FLT TD
Time delay for the BRAKE FAULT signal.
4 BRAKE REOPEN TD
Minimum time between two brake lift orders. That is BRAKE LIFT must be "False" for at least this time before next start is giving a new BRAKE LIFT order issued. Used if mechanical brake is equipped with a "reduced holding voltage" circuit.
5 BRAKE LONG FT TD
Time delay for monitoring signal "brake long falltime"
6 ZERO SPEED LEV
Parameter for setting the speed level for ZERO SPEED indication. Warning: Do not set 0% level. Result would be that brake would never close.
7 ZERO SPEED TIME
Time delay before signal ZERO SPEED is set to "1" when the motor speed is below ZERO SPEED LEV.
If parameter 67.11 MOTOR TYPE is set to CONICAL, than this parameter is used to delay the stop sequence with reduced flux.
8 SPEED REF TD
Time delay at start before releasing speed reference to ramp unit.
9 START TORQ SEL
Set the desired value if an initial starting torque is required. NOT USED
No extra starting torque. AUTO TQ MEM
Automatic torque memory selected. Note: value set in parameter 67.10 is used as
a minimum value for the torque memory. LOAD MEAS
Starting torque reference is received from an superior controller (DS5.2) e.g. measurement from a load cell.
PAR 67.10 Starting torque reference is fixed using torque level set in parameter 67.10 MIN START TQ REF.
10 MIN START TQ REF
Starting torque reference level used if parameter 67.9 is set to: "PAR 67.10".
11 MOTOR TYPE
CONICAL = Conical motor function active. Reduced flux level at stop set with parameter 67.12 and possibility for increased flux at start (par 67.13 & 67.14). See
section Mechanical brake control (67) on page 89 , for details on Conical motor function.
STANDARD = Conical motor function not active.
12 RED FLUX LEVEL
Reduced flux level used when stopping, if Conical motor function is activated in parameter 67.11 . For higher power conical motors on hoists, use a lower value than the default 75% if needed to further reduce "roll-back" when stopping.
Note: The reduced flux at stop will increase the motor current during stopping. Therefor it's normally needed to use one size bigger converter.
13 START FLUX LEVEL
Increased flux level used when starting, if Conical motor function is activated in parameter 67.11 . Increased flux level active during time set in parameter 67.14.
14 START FLUX TIME
The increased flux level at start (with level set in parameter 67.13) is active during a time set with START FLUX TIME.