YASKAWA L1000A Quick Start Manual page 91

Figure 43 is divided into time zones.
Table 28 Time Zones for Brake Sequence without Torque Compensation at Start
Time Zone
Up or Down command is issued.
Safe Disable terminals H1-HC and H2-HC must be set and Baseblock must be disabled (digital inputs set to H1- = 8/9).
Speed reference must be selected by multi-function input terminals.
Output contactor control signal is set (H2- = 51) by the drive.
t1
Drive waits for the "Motor Contactor Feedback" signal (H1- = 56) to be issued. If the motor contactor feedback is not
received within t1, or if 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- = 50) in order to
release the brake.
DC Injection Braking or Position Lock will continue until:
the time S1-04 has elapsed, or
t3
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.
Leveling speed is selected. The drive decelerates to the leveling speed and maintains that speed until the Up or Down command is
t5
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 close the brake set in S1-07 has passed, the drive clears the "Brake Control" output (H2- = 50). The
brake applies.
The drive continues DC Injection or Position Lock until the time S1-05 has passed. When S1-05 has passed the drive output is
t8
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
t9 Control" (H2- = 51).
The Safe Disable Inputs can be cleared and Baseblock can be enabled.
Brake Sequence Using Torque Compensation
If a load measuring device is installed in the elevator, an analog input can be used to input a torque compensation value to
the drive. This function requires one of the closed loop control modes (CLV or CLV/PM). To use torque compensation,
one of the analog input terminals must be configured to provide the torque compensation signal (H3- = 14).
Figure 44 is a timing chart for a brake sequence using torque compensation.
Figure 39
S1-10
(Up/Down Command
Delay Time)
Speed
Latch value from analog input
Torque Compensation at Start
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)
YASKAWA ELECTRIC TOEP C710616 38H YASKAWA AC Drive-L1000A Quick Start Guide
Table 28 explains the sequence in each time zone.
S1-04
Selected Speed
(DC Injection/
Position Lock
Time at Start)
S3-14 (Torque
Compensation
Position Lock
Diminish Speed)
300%Torque
Torque Compensation
Fades Out with S3-15
at S3-14.
S3-10 (Starting
Torque Compensation
Increase Time)
t1 t2 t3
Figure 44 Brake Sequence Using Torque Compensation at Start
4 Start-Up Programming & Operation
Description
d1-26
(Leveling Speed)
t4 t5
S1-05
(DC Injection
Braking/
S1-11
Position Lock at stop)
(Output Contactor
Position Lock
Open Delay Time)
S1-07
(Brake
Close
Delay
Time)
t6 t7 t8 t9
Enabled
4
89