32
YASKAWA
TOMPYEULA7002A LA700 Series Installation and Operation Instruction
Brake Torque Check Sequence
Figure 1.11 Brake Torque Check Sequence
Note:
•
The brake sequence after the Up/Down command is turned ON is the same as before, but the drive will not release the brake.
•
The carrier frequency is fixed at 2 kHz and the PWM method is fixed at 3-phase modulation during the brake torque check.
•
The internal torque limit during the brake torque check is the value set in
S5-32 [Applying Motor Torque During BTC]
.
•
If
S5-32
is set larger than the torque limit of the unit, an
oPE21 [Elevator Parameter Setting Fault]
error will occur.
•
The drive internally does the Emergency Stop operation when the brake torque check is completed.
•
If the elevator car moves more than the value set in
S5-31 [Car Movement @ Brake T Check]
, the drive detects a
brA [Brake
Deterioration]
fault.
is divided into time zones.
explains the sequence in each time zone.
Table 1.9 Time Zones for Brake Torque Check Sequence
Time Zone
Description
t1
You must set Safe Disable terminals H1-HC and H2-HC and you must disable Baseblock (digital inputs set to
H1-xx = 8 or 9
).
When the
Brake Trq Req
command (
H1-xx = 5D
) is turned ON, the MFDO terminal outputs the
During Brake Torque Check
signal (
H2-xx = 5D
).
Up command is issued.
t2
Drive waits for the
Motor Contactor Feedback N.O.
signal (
H1-xx = 56
) to be issued.
If the drive does not receive motor contactor feedback within t2, or if the feedback signal is ON before the contactor control command has been issued, an
SE1
[Motor Contactor Response Error]
fault is triggered. If you do not use a motor contactor feedback signal, the drive waits for the operation start delay time set in
S1-10 [Up/Down Command Delay Time]
to pass before it goes to the next step.
After the delay time set in
S1-10
passes, the drive outputs current to the motor. Position Lock begins.
The drive starts accelerating at the brake torque check speed (fixed at 3%).
The torque increases to the value set in
S5-32
in the time set in
S5-33 [Motor Torque Ramp Up Time]
.
t5
The drive operates as specified by the settings in
S5-35 [Brake Torque Check Run Time]
and
S5-32
to check the brake torque.
t6
After the time set in
S5-35
passes, the torque decreases in the time set in
S5-34 [Motor Torque Ramp Down Time]
, and the drive decelerates to stop. When the
brake torque is normal, the drive outputs the
Brake Torque Check Complete
signal (
H2-xx = 5E
).
The motor speed reaches the zero speed level set in
S1-01 [Zero Speed Level at Stop]
.
The drive continues Position Lock for the time set in
S1-05 [DC Inj/Pos Lock Time at Stop]
.
After the delay for the magnetic contactor set in
S1-11 [Output Contactor Open Delay Time]
passes, the drive resets the output terminal set for
Output
Contactor Control
(
H2-xx = 51
). You can now clear the Safe Disable Inputs and enable Baseblock.
When the
Brake Trq Req
command (
H1-xx = 5D
) is turned OFF after the Up command is turned OFF, the
During Brake Torque Check
signal (
H2-xx = 5D
) and
the
Brake Torque Check Complete
signal (
H2-xx = 5E
) are turned OFF.