Yaskawa L1000E AC Drive Technical Manual for CIMR-LE Models for Elevator Applications - Manual (Page 142)

4.6 Setup Procedure for Elevator Applications
142 YASKAWA ELECTRIC SIEP YAIL1E 01A YASKAWA AC Drive L1000E Technical Manual
■ Light Load Direction Search Function
Light Load Direction Search can be used to automatically perform Rescue Operation in the direction with the lower load.
It can help to minimize the amount of power required by the backup power supply required for Rescue Operation. Light
Load Direction Search can be set so that it is automatically performed when Rescue Operation is started. To enable Light
Load Direction Search set parameter S4-01 = 1.
When Light Load Direction Search is enabled the drive first runs in the up and then in the down direction, each for the
time set to S4-03. It then compares the load condition of both operations and travels to the next floor using the lighter load
condition direction. The speed reference used for Light Load Direction Search can be set in parameter S4-04.
• When the lightest load direction is up, the drive stops after Light Load Direction Search and then accelerates upwards to
the Rescue Operation speed set in parameter d1-25. The output terminals set for “Light Load Direction” (H2-†† = 54)
and “Light Load Direction detection status”(H2-†† = 55) will close.
Figure 4.37
Figure 4.42 Light Load Direction Detection (Up)
• When the lightest direction is down, then after Light Load Direction Detection is finished the drive immediately
accelerates to the Rescue Operation speed set in d1-25 without stopping. An output terminal set for “Light load
direction” (H2-†† = 54) will stay open, and an output terminal set for “Light Load Direction detection status”(H2-
†† = 55) will close.
Figure 4.38
Figure 4.43 Light Load Direction Detection (Down)
H1- غغ = 55
(Rescue Operation)
Up
Off (open)
Off (open)
Up
Down
Speed agree torque calculations
Elevator moves in the
direction of the light load
Up/Down command
Up command (internal)
Down command (internal)
On (closed)
On (closed)
㧔Light Load Direction Search status㧕
H2- = 55
㧔Light load direction㧕
H2- = 54
Off (open)
Off (open)
On (closed)
On (closed)
H1- غغ = 55
(Rescue Operation)
Up
Off (open)
Off (open)
Down
Speed agree torque calculations
Elevator moves in the
direction of the light load
Up/Down command
Up command (internal)
Down command (internal)
On (closed)
On (closed)
㧔Light Load Direction Search status㧕
H2- = 55
㧔Light load direction㧕
H2- = 54
Off (open)
Off (open)
On (closed)