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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.
Figure 1.11
is divided into time zones.
Time Zone
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).
t1
Up command is issued.
Drive waits for the Motor Contactor Feedback N.O. signal (H1-xx = 56) to be issued.
t2
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.
*1
After the delay time set in S1-10 passes, the drive outputs current to the motor. Position Lock begins.
t3
The drive starts accelerating at the brake torque check speed (fixed at 3%).
*2 *3 *4
t4
The torque increases to the value set in S5-32 in the time set in S5-33 [Motor Torque Ramp Up Time].
*2 *4
The drive operates as specified by the settings in S5-35 [Brake Torque Check Run Time] and S5-32 to check the brake torque.
t5
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
*4 *5
t6
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].
*5
t7
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.
*5
t8
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.
32
Figure 1.11 Brake Torque Check Sequence
Table 1.9
explains the sequence in each time zone.
Table 1.9 Time Zones for Brake Torque Check Sequence
YASKAWA TOMPYEULA7002A LA700 Series Installation and Operation Instruction
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