Control locations and operating modes 23
Speed control mode
The motor follows a speed reference given to the drive. This mode can be used either
with estimated speed as feedback, or with an encoder for better speed control
accuracy.
Speed control mode is available in both local and external control. It is also available
both in vector control and scalar motor control modes.
Torque control mode
Motor torque follows a torque reference given to the drive. Torque control is possible
without feedback, but is much more dynamic and accurate when used in conjunction
with a feedback device such as an encoder. It is recommended that a feedback
device is used in crane, winch or lift control situations.
Torque control mode is available in Vector motor control mode for both local and
external control locations.
Frequency control mode
The motor follows a frequency reference given to the drive. Frequency control is only
available in scalar motor control mode.
Special control modes
In addition to the control modes mentioned above, the following special control
modes are available:
• For more information, see section
(page
).
• Emergency stop modes Off1 and Off3: Drive stops along the defined deceleration
ramp and drive modulation stops.
• Jogging mode: Drive starts and accelerates to the defined speed when the
jogging signal is activated. For more information, see section
).
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 ...