4.6 Setup Procedure for Elevator Applications
■ 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 o f the analog input terminals must be configured to provide the torque compensation signal (И3-ПП = 14).
Figure 4.16
is a timing chart for a brake sequence using torque compensation.
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 (Н1-ПП=8/9)
Output Contactor Control
(Н2-ПП = 51)
Motor Contactor Response
(Н1-ПП = 56)
Brake Control (Н2-ПП = 50)
S1-04
(DC Injection/
— Position Lock —
Time at Start)
Position Lock
300%Torque
„<1
S3-10 (Starting
Torque Compensation
Increase Time)
t3
Selected Speed
'S3-14 (Torque
Compensation
Fade Out Speed)
/
Torque Compensation
Fades Out with S3-10
\
at S3-14.
d1-26
(Leveling Speed)
S1-05
(DC Injection
:----
Braking/ —
Position Lock at stop)
Position Lock
S1-07
(Brake
Close
Delay
Time)
t4
t5
t7
t8
С
S1-11
(Output Contactor
Open Delay Time)
t9
Enabled
F ig u r e 4 .1 6 B ra k e S e q u e n c e U s in g T o r q u e C o m p e n s a t i o n a t S ta r t
Figure 4.16
is divided into time zones.
Table 4.12
explains the sequence in each time zone.
Table 4.12 Time Zones fo r Brake Sequence Using Torque Compensation at Start
t1
t2
t6
T im e Z o n e
D e s c rip tio n
t1
Up or Down com m and is issued.
Safe Disable term inals H 1-H C and H 2-H C m ust be set and Baseblock m ust be disabled (digital inputs set to H 1 -D D = 8/9).
Speed reference m ust be selected b y m ulti-function input term inals.
O utput contactor control signal is set (H 2 -D D = 51) by the drive.
Drive waits for the “M otor Contactor Feedback” signal (H 1 -D D = 56) to be issued. I f the m otor contactor feedback is not received w ithin t1, or if
the feedback signal is on before the contactor control com m and has been issued, an SE1 fault is triggered.
I f the m otor contactor feedback signal is not used, then the drive waits for the operation start delay tim e set in S1-10 to pass, then proceeds to the
next step.
The drive reads the torque value from the analog input (load cell).
t2
A fter the delay tim e set in S1-10 has passed, the drive outputs current to the motor. Position L ock begins.
The torque value from the analog input is latched and internal torque com pensation value is increased from zero to the latched value using the
tim e constant set in S3-10.
A fter the internal torque com pensation level reaches the latched value, the drive sets the “Brake Control” output (H 2 -D D = 50) in order to release
the brake.
t3
The brake is released and the drive executes Position L ock until the tim e set in S1-04 has passed.
t4
The drive accelerates up to the selected speed.
A fter the torque com pensation fade-out speed level (S3-14) is reached during acceleration, the internal torque com pensation value is reduced in
accordance w ith the tim e constant set in S3-10.
t5
Leveling speed is selected. The drive decelerates to the leveling speed and m aintains th at speed until the Up or Down com m and is removed.
t6
The Up or Down signal is cleared. The drive decelerates to zero speed.
t7
The m otor speed reaches the zero speed level (S1-01).
DC Injection Braking or Position L ock is then executed for the tim e set in S1-05.
A fter the delay tim e to close the brake set in S1-07 has passed, the drive clears the “Brake Control” output (H 2 -D D = 50). The brake applies.
t8
The drive continues DC Injection or Position L ock until the tim e S1-05 has passed. W hen S1-05 has passed the drive output is shut off.
t9
A fter the delay for the m agnetic contactor set in S1-11 has passed, the drive resets the output term inal set for “O utput C ontactor Control” (H2-
□ □ = 51).
The Safe Disable Inputs can be cleared and B aseblock can be enabled.
YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
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