4.6 Setup Procedure for Elevator Applications
■ Inertia Compensation (CLV and CLV/PM)
Inertia compensation can be used to eliminate motor speed overshoot at the end o f acceleration or undershoot at the end
o f deceleration caused by the system inertia. Adjust the function following the steps below.
1. Properly adjust the speed control loop parameters (C5-DD).
2. Set parameter n5-01 to 1 to enable inertia compensation.
3. Calculate and set n5-02 and n5-03 as follows:
M otor A cceleration Time n5-02
n • n ...
n5-02 =
J Mot
• 30 • T
M o
r_Mot
Inertia Com pensation Gain
n5-03
/ 3 0 • v _.
\2
“TS ' '
l П • nr_Mot
1
n5-03 =
/ J Mot
JMot - M otor inertia in k gm 2
п
. Mot - Rated m otor speed in m in-1
Tr Mot - Rated m otor torque in Nm
JT
s
- Traction sheave inertia in kgm 2
i - G ear ratio (nLoad/nMot)
vr Elev - R ated elevator speed in m/s
Xm - M ass o f all m oved parts (car, counterw eight, ropes, load <
1
>) in kg
<1> Insert 0 kg for the load to calculate the lowest setting, insert the elevator rated load to calculate the maxim um setting for n5-03. U se the lower
setting for initial trials.
4. Change the setting of n5-03 within the limits calculated in step 3 until the desired performance is achieved.
If possible, trace the output speed after soft starter (U1-16) and the motor speed (U1-05) values. Increase n5-03 if the
motor speed does not follow the speed after soft start. Decrease n5-03 if the motor overshoots the designated speed at
the end of acceleration or undershoots the speed at the end of deceleration.
■ Adjusting Position Lock at Start (CLV/PM)
Set the S3-DD and C5-D D parameters as described below in order to reduce rollback effects at start.
• With the elevator car unloaded, adjust the speed loop gain (C5-19) and integral time for Position Lock (C5-20).
Increase the gain and reduce the integral time in order to reduce the rollback o f the car. Set parameters C5-19 and
C5-20 in the opposite way if vibration occurs.
• Adjust the Position Lock at start gain 2 (S3-02). Increase S3-02 if rollback occurs, decrease S3-02 it if vibration occurs.
• If the elevator is balanced and oscillation at start occurs, attempt gradually increasing the setting in S3-40 in increments
of one pulse.
• Rescue Operation
In the event o f a power outage, Rescue Operation allows the elevator to travel to the nearest floor by switching to a
backup battery or UPS (Uninterruptable Power Supply) for power.
An input terminal set for Rescue Operation (H1-DD = 55) can be used to initiate Rescue Operation. During Rescue
Operation, the drive uses the speed reference set in d1-25 to travel to the nearest floor.
N O TICE:
E q u ip m e n t Hazard. D o n o t u se the R e s c u e O pe ra tio n fe a tu re fo r e x te n d e d pe rio ds. F ailure to c o m p ly m a y re s u lt in drive
h e a t s in k o ve rte m p e ra tu re alarm s (oH).
N O TICE:
W hen c h a n g in g p a ra m e te rs w h ile the drive is s u p p lie d from th e re s c u e o p e ra tio n p o w e r supply, w a it a t le a s t 5 s a fte r
e n te rin g p a ra m e te rs b e fo re s w itc h in g o ff the p o w e r supply. In s ta n tly s w itc h in g o ff the p o w e r c an ca u se p a ra m e te r s e ttin g s co rru p tio n
th a t can o n ly be re s o lv e d b y in itia liz in g th e drive. This m a y ca u se e rro n e o u s drive pe rfo rm an ce.
N O TICE:
A lw a y s turn o ff the R U N c o m m a n d b e fo re c h a n g in g the s e ttin g o f p a ra m e te rs d 1 -1 8 (S p e e d R e fe re n c e S ele ctio n M ode), b1-
01 (S p e e d R e fe re n c e S election), o r H 1 - \3 \3 (M u lti-F u n c tio n D ig ita l Inputs). I f the R U N c o m m a n d is on w h en c h a n g in g a n y o f these
settings, the m o to r m a y u n e x p e c te d ly sta rt running, a n d c o u ld re s u lt in injury.
■ Drive Power Supply for Rescue Operation
There are various methods of supplying power to the drive for rescue operation. Independent o f the chosen method, the
voltage in the DC bus o f the drive and the voltage supplied to the drive control circuit must meet the specifications
provided in
Table 4.13
.
The DC bus voltage can either be supplied by a battery connected to the DC bus terminals of the drive or by a UPS
connected to drive terminals L1 and L2. The control circuit voltage can be supplied directly from the drives DC bus (no
external wiring required), from an external battery (connection to CN19), or by using an optional 24 Vdc control power
backup unit.
114
YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
