Delta VFD-ED Series, User Manual

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Ch12 Descriptions of Parameter Settings | VFD-ED
12-15
Direct docking terminal function (using multi-step speed change)
 Definitions of deceleration distance for short floors:
When the motor runs with the highest speed, the deceleration distance for short floors is calculated
according to the first deceleration time (S3 curve time, equivalent deceleration time, S4 curve time) and
leveling speed duration, as Pr.01-37 in Case 1_Short floor function diagram illustrated.
The following cases are illustrated by diagrams:
Case 1. Deceleration point (instead of high speed) is given before allowed speed
Case 2. Deceleration point (instead of high speed) is given before allowed speed and high speed time is
not zero.
Case 3. Deceleration point (instead of high speed) is given before allowed speed and high speed time is
zero.
Case 1. Deceleration point (instead of high speed) is given before allowed speed
Regardless of the corresponding speed when the drive gives the deceleration points, the drive issues the
speed allowance command to replace leveling speed, executes the corresponded S2 curve before allowed
speed, maintains the high speed time set, and gives the leveling speed after high speed duration. Refer to
Pr.01-12, 01-24, 01-25 for information on acceleration curves.