Brake Sequence - YASKAWA L1000V Technical Manual

4.6 Setup Procedure for Elevator Applications
u Brake Sequence
WARNING! Sudden Movement Hazard. Rapid deceleration may cause the drive to fault on an overvoltage condition, resulting in death
or serious injury due to an uncontrolled motor state. Be sure to set an acceptable deceleration time in parameter C1-09,
EmergencyStop Ramp, when using the fast-stop feature.
Figure 4.11
S1-10
(Up/Down Command
Delay Time)
Speed
Up/Down Command
Safe disable (terminals H1/H2 on)
and Baseblock off (H1- =8/9)
Output Contactor Control
(H2- = 51)
Motor Contactor Response
(H1- = 56)
Brake Control (H2- = 50)
Figure 4.12 is divided into time zones.
Time Zone
Up or Down command is issued.
Safe Disable terminals H1-HC must be set and Baseblock must be disabled (digital inputs set to H1-
Speed reference must be selected by multi-function input terminals.
t1 Output contactor control signal is set (H2-
Drive waits for the "Motor Contactor Feedback" signal (H1-
the feedback signal is on before the contactor control command has been issued, an SE1 fault is triggered.
If the motor contactor feedback signal is not used, then the drive waits for the operation start delay time set in S1-10 to pass, then proceeds to the
next step.
After the delay time set in S1-10 has passed, the drive outputs current to the motor.
DC Injection Braking or Position Lock begins.
t2
After the brake release delay time set in S1-06 has passed, the drive sets the "Brake Control" output (H2-
DC Injection Braking or Position Lock will continue until:
t3 the time S1-04 has elapsed, or
the time S1-06 has elapsed if S1-06 > S1-04 (this setting should be avoided since the motor could be driven against the applied brake).
t4 The drive accelerates up to the selected speed. The speed is kept constant until the leveling speed is selected.
t5 Leveling speed is selected. The drive decelerates to the leveling speed and maintains that speed until the Up or Down command is removed.
t6 The Up or Down signal is cleared. The drive decelerates to zero speed.
The motor speed reaches the zero speed level (S1-01).
DC Injection Braking or Position Lock is then executed for the time set in S1-05.
t7
After the delay time to apply the brake set in S1-07 has passed, the drive clears the "Brake Control" output (H2-
t8 The drive continues DC Injection or Position Lock until the time S1-05 has passed. When S1-05 has passed the drive output is shut off.
After the delay for the magnetic contactor set in S1-11 has passed, the drive resets the output terminal set for "Output Contactor Control" (H2-
t9 = 51).
The Safe Disable Inputs can be cleared and Baseblock can be enabled.
90
S1-04
(DC Injection/
Selected Speed
PositionLock
Time at Start)
DC Injection Braking/
Position Lock at Start
S1-06
(Brake
Release
Delay
Time)
t1 t2 t3
Figure 4.12 Brake Sequence Timing Diagram
Table 4.7 explains the sequence in each time zone.
Table 4.7 Time Zones for Brake Sequence Timing Diagram
= 51) by the drive.
YASKAWA EUROPE SIEP
d1-26
(Leveling Speed)
Position Lock at Stop
S1-07
(Brake
Close
Delay
t4 t5 t6
Description
= 56) to be issued. If the motor contactor feedback is not received within t1, or if
S1-05
(DC Injection
Braking/Position
S1-11
Lock Time at stop)
(Output Contactor
DC Injection/
Open Delay Time)
Time)
t7 t8 t9
Enabled
= 8/9).
= 50) in order to release the brake.
= 50). The brake applies.
YASKAWA AC Drive L1000V Technical Manual