Defining The Basic Data For Speed Correction; Calculating The Linear Rope Speed; Defining The Basic Data For Speed Reference Calculation - ABB ACS800 Firmware Manual

Defining the basic data for speed correction

Example: If parameter
the Follower drive is (0.1 ×
between the Master and Follower drive is 1 unit.

Calculating the linear rope speed

The linear rope speed can be calculated as follows.
Pi * Diameter of the rope drum (mm) * Motor speed (rpm)
Linear speed =
Example:
If the diameter of rope drum = 1000 mm
Gear ratio = 2.5
Motor rotating at 500 rpm
Then the linear speed = (3.1416 * 1000 * 500) / 2.5 = 628320 mm/min

Defining the basic data for speed reference calculation

Parameter 78.03
speed reference calculation in the Follower drive.
Example: If the Master drive full speed corresponds to a rope speed of 40 000 mm/
min, and the Follower drive full speed corresponds to 30 000 mm/min, parameter
78.03 SHAFT SCALE should be set to value 40 000/30 000 = 1.333. The Follower
multiplies this factor with the speed reference of the Master drive. (Note that there
may be a difference in the gear ratio, which also needs to be considered.)
Parameters 78.05
used for limiting the speed correction in terms of mm. If the error exceeds or falls
below these parameters (respectively), the speed correction in terms of mm will be
limited to these parameter values.
When the absolute error is greater than the value defined in
for a period longer than
FAULT.
Signal 02.23 SYNC POS ERROR displays the position error of the drive in mm if the
drive is a Follower. Signals
ERROR 2, 02.26
respective Follower 1, Follower 2, Follower 3 and Follower 4 position errors in mm
that are displayed in the Master drive.
78.02 SYNCRO GAIN is set to 0.1, the speed correction in
78.08 SYNC CORR SCALE) rpm if the position error
Gear ratio
SHAFT SCALE defines the position correction factor used in the
POS CORR MAX LIMIT and
78.07 SYNC ERR FLT DLY, the drive will trip on SYNC
02.24 SYNC POS ERROR 1,
SYNC POS ERROR 3 and
78.06 POS CORR MIN LIMIT are
78.09
02.25 SYNC POS
02.27 SYNC POS ERROR 4 are the
103
SYNC ERR LIM
Program features