ABB ACS880 Firmware Manual page 53

Configuration of HTL encoder motor feedback
1. Specify the type of the encoder interface module (parameter
= FEN-31) and the slot the module is installed into
2. Specify the type of the encoder
listing will be re-read from the drive after the value is changed.
3. Specify the interface module that the encoder is connected to
source = Module
4. Set the number of pulses according to encoder nameplate
(92.10 Pulses/revolution).
5. If the encoder rotates at a different speed to the motor (ie. is not mounted directly
on the motor shaft), enter the gear ratio in
90.44 Motor gear
6. Set parameter 91.10 Encoder parameter refresh
parameter settings. The parameter will automatically revert to Done.
7. Check that 91.02 Module 1 status
(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
speed (01.04 Encoder 1 speed
encoder as the feedback source
10. Specify the action taken in case the feedback signal is lost
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
settings are made:
• (90.43 Motor gear numerator
• (90.44 Motor gear denominator
(No gear is needed as the encoder is mounted directly on the motor shaft.)
• 90.51 Load feedback selection
• (90.53 Load gear numerator
• 90.54 Load gear denominator
The cable drum turns one revolution per 50 revolutions of the motor shaft.
• (90.61 Gear numerator
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(92.01 Encoder 1 type
1).
denominator.
is showing the correct interface module type
(01.02 Motor speed
filtered). If the values are the same, set the
(90.41 Motor feedback selection
= 1)
= 1)
= Encoder 1
= 1)
= 50
= 1)
Program features 53
91.11 Module 1 type
(91.12 Module 1
= HTL). The parameter
(92.02 Encoder 1
90.43 Motor gear numerator
to Refresh to apply the new
estimated) with the measured
(90.45 Motor feedback
above. In addition, the following
location).
and
= Encoder 1).