ABB ACS860 - Jogging

Program features 47
6. Set parameter 91.10 Encoder parameter refresh to Refresh to apply the new
parameter settings. The parameter will automatically revert to Done.
7. Check that 91.02 Module 1 status is showing the correct interface module type
(FEN-31). Also check the status of the module; both LEDs should be glowing
green.
8. Start the motor with a reference of eg. 400 rpm.
9. Compare the estimated speed (01.02 Motor speed estimated) with the measured
speed (01.04 Encoder 1 speed filtered). If the values are the same, set the
encoder as the feedback source (90.41 Motor feedback selection = Encoder 1).
10. Specify the action taken in case the feedback signal is lost (90.45 Motor feedback
fault).
Example 1: Using the same encoder for both load and motor feedback
The drive controls a motor used for lifting a load in a crane. An encoder attached to
the motor shaft is used as feedback for motor control. The same encoder is also used
for calculating the height of the load in the desired unit. A gear exists between the
motor shaft and the cable drum. The encoder is configured as Encoder 1 as shown in
Configuration of HTL encoder motor feedback above. In addition, the following
settings are made:
•(90.43 Motor gear numerator = 1)
•(90.44 Motor gear denominator = 1)
(No gear is needed as the encoder is mounted directly on the motor shaft.)
• 90.51 Load feedback selection = Encoder 1
•(90.53 Load gear numerator = 1)
• 90.54 Load gear denominator = 50
The cable drum turns one revolution per 50 revolutions of the motor shaft.
•(90.61 Gear numerator = 1)
•(90.62 Gear denominator = 1)
(These parameters need not be changed as position estimate is not being used
for feedback.)
• 90.63 Feed constant numerator = 7
• 90.64 Feed constant denominator = 10
The load moves 70 centimeters, ie. 7/10 of a meter, per one revolution of the
cable drum.
The load height in meters can be read from 90.07 Load position scaled int, while
90.03 Load speed displays the rotational speed of the cable drum.
 Jogging
The jogging function enables the use of a momentary switch to briefly rotate the
motor. The jogging function is typically used during servicing or commissioning to
control the machinery locally.