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Program features 53
Configuration of HTL encoder motor feedback
1. Specify the type of the encoder interface module (parameter
) and the slot the module is installed into (
).
2. Specify the type of the encoder (
=
). The parameter
listing will be re-read from the drive after the value is changed.
3. Specify the interface module that the encoder is connected to (
).
4. Set the number of pulses according to encoder nameplate
(
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
and
.
to apply the new
parameter settings. The parameter will automatically revert to
7. Check that
is showing the correct interface module type
(
). 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 (
) with the measured
speed (
01.04 Encoder 1 speed filtered
). If the values are the same, set the
encoder as the feedback source (
).
10. Specify the action taken in case the feedback signal is lost (
).
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:
•
(
= 1)
•
(
= 1)
(No gear is needed as the encoder is mounted directly on the motor shaft.)
•
•
(
= 1)
•
= 50
The cable drum turns one revolution per 50 revolutions of the motor shaft.
•
(
= 1)
Summary of Contents for ACS880-x04
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Page 4: ......
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 112: ...112 Application macros ...
Page 496: ...496 Additional parameter data ...
Page 544: ...544 Fault tracing ...
Page 602: ...602 Control chain diagrams ...