YASKAWA L1000A Technical Manual page 121

Adjusting the Torque Compensation at Start
CAUTION! Set all motor-related parameters (the E -
compensation at start. Adjusting the torque compensation prematurely may result in faulty performance.
To use torque compensation at start, apply at least 50% of the maximum weight to the elevator car and set the drive
according to the Load Condition 2 procedure below. If using a voltage signal to the analog input terminals as a load
sensor, then that input signal will determine the rate of torque compensation applied according to S3-27 and S3-28.
Before the torque compensation function can be used, the analog input scaling must be adjusted to the load sensor output.
This can be done by bringing the elevator into two different load conditions and teaching the corresponding analog input
value and torque reference value to the drive.
Note: 1. This torque compensation requires a closed loop control mode (CLV, CLV/PM).
2. The torque compensation value is limited to 120%.
Set an analog input terminal for torque compensation (H3-
Procedure for Load Condition 1 (S3-27, S3-29)
1.
Make sure the drive is wired properly. For instructions, refer to
2.
Set the speed reference to 0%.
3.
Apply no weight to the elevator car.
4.
Note the value of the analog input monitor for the load signal input is connected to (U1-13 for terminal A1, U1-14
for terminal A2).
5.
Provide an elevator Up or Down command, using Inspection Operation or normal operation mode. The car
should be held in place when the brake releases.
6.
Note the drives internal torque reference monitor U1-09.
7.
Stop the drive.
8.
Set the value noted in step 4 to parameter S3-29. Set the value noted in step 6 to parameter S3-27.
Procedure for Load Condition 2 (S3-28, S3-30)
1.
Set the speed reference to 0%.
2.
Apply load to the car has much as possible (at least 50% of the maximum weight).
3.
Note the value of the analog input monitor for the load signal input connected to (U1-13 for terminal A1, U1-14 for
terminal A2)
4.
Provide an elevator Up or Down command, using Inspection Operation or normal operation mode. The car
should be held in place when the brake releases.
5.
Note the drives internal torque reference monitor U1-09.
6.
Stop the drive.
7.
Set the value noted in step 3 to parameter S3-30. Set the value noted in step 5 to parameter S3-28.
After setting load conditions 1 and 2, perform a trial run. If required, parameter S3-12 can be set up to add a bias to the
load sensor input when riding in a Down direction (default: 0.0%, same torque compensation characteristics in up and
down direction). Figure 4.15
30.
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
parameters) and perform a test run before fine-tuning the torque
illustrates the effect of torque compensation on the settings of S3-12 and S3-27 through S3-
4.6 Setup Procedure for Elevator Applications
= 14) and proceed with the steps below.
Standard Connection Diagram on page 52.
4
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