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Fieldbus control through the embedded fieldbus interface (EFB) 451
Operation mode specific bits:
Modes of operation
The operation mode defines the behavior of the drive. The following CiA 402
operation modes are supported:
• Profile velocity mode
• Profile torque mode
• Velocity mode
• Cyclic synchronous velocity mode
• Cyclic synchronous torque mode
The ACS380 CANopen implementation supports minimal implementation of the
operation modes. In this chapter scalings of the reference and actual values are
described for each operation mode. Operation-mode-specific objects are defined in
section
Object dictionary
on page
465
.
The mode of operation is automatically selected to be either velocity mode or profile
torque mode according to the control mode configured with parameter
19.12
Ext1
control mode
or
19.14
Ext2 control mode
(depending on the current control location).
The correct reference scaling must be selected with parameters
58.26
EFB ref1 type
and
58.27
EFB ref2 type
. When in Velocity mode, the drive can be switched to Profile
velocity mode or Cyclic synchronous velocity mode with the object 6060h. When in
Profile torque mode, the drive can be switched to Cyclic synchronous torque mode
with the object 6060h.
Velocity mode
Velocity mode is a basic mode to control the velocity of the drive with limits and ramp
functions. Target velocity is set with the object 6042h and velocity actual value can be
read from the object 6044h. Velocity values are scaled with the dimension factor
given in object 604Ch. By default the dimension factor is 1, and the velocity values
are given in rpm, e.g. 1 = 1 rpm.
Profile velocity mode
The profile velocity mode is used to control the velocity of the drive with no special
regard of the position. Target velocity is set with the object 60FFh and the velocity
actual value can be read from the object 606Ch. Velocity values are given in
increments per second. Increment resolution is defined by the object 608Fh. The
default values in object 608Fh are 65536 increments per 1 revolution. This means
that 1 rpm equals 1 [rpm] * 65536 [inc/s] / 60 [s/min] = 1092 inc/s.
Bit
Velocity mode
Profile velocity mode
Profile torque mode
12
Reserved
Speed is zero
Reserved
13
Reserved
Max slippage reached
Reserved
ACS380 FW.book Page 451 Friday, May 4, 2018 4:18 PM
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