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54 Program features
•
(
= 1)
(These parameters need not be changed as position estimate is not being used
for feedback.)
•
= 7
•
= 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
, while
displays the rotational speed of the cable drum.
Example 2: Using two encoders
One encoder (encoder 1) is used for motor feedback. The encoder is connected to
the motor shaft through a gear. Another encoder (encoder 2) measures the line
speed elsewhere in the machine. Each encoder is configured as shown in
Configuration of HTL encoder motor feedback
above. In addition, the following
settings are made:
•
(
=
•
(
= 1)
•
= 3
The encoder turns three revolutions per one revolution of the motor shaft.
•
The line speed measured by encoder 2 can be read from
. This
value is given in rpm which can be converted into another unit by using
. Note that the feed constant gear
cannot be used in this conversion because it does not affect
Example 3: ACS 600 / ACS800 compatibility
With ACS 600 and ACS800 drives, both the rising and falling edges from encoder
channels A and B are typically counted to achieve best possible accuracy. Thus the
received pulse number per revolution equals four times the nominal pulse number of
the encoder.
In this example, an HTL-type 2048-pulse encoder is fitted directly on the motor shaft.
The desired initial position to correspond the proximity switch is 66770.
Содержание ACS880-x04
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Страница 4: ......
Страница 18: ...18 Using the control panel ...
Страница 24: ...24 Control locations and operating modes ...
Страница 111: ...Application macros 111 Fieldbus control macro This application macro is not supported by the current firmware version ...
Страница 112: ...112 Application macros ...
Страница 496: ...496 Additional parameter data ...
Страница 544: ...544 Fault tracing ...
Страница 602: ...602 Control chain diagrams ...