46 Program features
Parameter
Pos counter error and boot action
calculation resumes from the previous value over an encoder error or control unit
reboot. By default, bit 4 of
indicating that reinitialization is needed. With
set to
, the position values are retained over an error or reboot; bit 6 of
however to indicate that an error occurred.
Note:
With a multiturn absolute encoder, bit 6 of
is cleared at the next stop of
the drive if the encoder has recovered from the error; bit 4 is not cleared. The status
of the position counter is retained over a control unit reboot, after which position
calculation resumes from the absolute position given by the encoder, taking into
account the initial position specified by
WARNING!
If the drive is in stopped state when an encoder error occurs, or if
the drive is not powered, parameters
are not updated
because no movement of the load can be detected. When using previous position
values (
Pos counter error and boot action
), be aware that the position data is unreliable if the load is able to move.
Reading/writing position counter values through fieldbus
The parameters of the position counter function, such as
, can be accessed from an upper-level control
system in the following formats:
•
16-bit integer (if 16 bits are sufficient for the application)
•
32-bit integer (can be accessed as two consequent 16-bit words).
For example, to read parameter
the selection parameter of the desired dataset (in group 52) to
Other
, and
select the format. If you select a 32-bit format, the subsequent data word is also
automatically reserved.
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
.
Summary of Contents for ACS860
Page 1: ... ABB INDUSTRIAL DRIVES ACS860 primary control program Firmware manual ...
Page 4: ......
Page 10: ...10 Table of contents ...
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 54: ...54 Program features ...
Page 78: ...78 Program features ...
Page 90: ...90 Application macros ...
Page 342: ...342 Additional parameter data ...
Page 380: ...380 Fault tracing ...
Page 381: ...Fault tracing 381 ...
Page 382: ...382 Fault tracing ...
Page 436: ...436 Control chain diagrams ...
