SI-EtherCAT User Guide
73
Issue Number: 2
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7.8.3
Velocity offset
This object is used to specify the velocity offset value. The value is given in user-defined units.
Table 7-66 Velocity offset
7.9
Cyclic Synchronous Torque Mode
Cyclic Synchronous Torque Mode
will be supported on Unidrive M600 and above.
On Unidrive M600 and above, this profile will operate on the control loop cycle time, using the
drive's torque reference (which is read by the drive every 250
µs
).
The following objects will be supported:
The target_torque object will be re-read every new control loop cycle; this torque value will be
limited by the max_current object (which is read in the background). This torque demand will be
scaled appropriately and written to the drive
Torque Reference
(Pr
04.008
); interpolation will be
used to generate additional intermediate values if the interpolation_time_period is greater than the
interval at which the drive will read the torque reference parameter. The drive
Motor Rated Current
(Pr
05.007
or the second motor map equivalent) will be read in the background and written to the
object motor_rated_current, which will be read-only.
7.9.1
Target torque
This object is used to specify the target torque value. The value is given in user-defined units.
Table 7-67 Target torque
0x60B1
Velocity offset
Sub-index 0
Access: RW
Range: -2
31
to +2
31
-1
Size: 4 bytes
Unit: N/A
Default:
0
Type: DINT
Description:
Specifies the velocity offset value per thousandths of RPM. (e.g. A value of 1000000 equates
to a reference of 1000.0 RPM. In Pr
03.022
).
The target velocity value is added to the velocity offset value to give the final
velocity reference value.
Index
Name
6071
target_torque
6073
max_current
6075
motor_rated_current
6077
torque_actual_value
6078
Current actual value
60B2
Torque Offset
60C2
Interpolation_time_period
0x6071
Target torque
Sub-index 0
Access: RW
Range: -32768 to
32767
Size: 2 bytes
Unit: N/A
Default:
0
Type: INT
Description:
Specifies the target torque value.
Value is in 0.1 % units. (e.g. A value of 1000 equates to 100.00 % in Pr
04.008
)
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