Siemens SINAMICS G120 List Manual page 384

2 Parameters
2.2 List of parameters
Dependency: Refer to: p0432, p0433, p2505
Note: The gearbox factor between the encoder shaft and the motor shaft is set using p0432 and p0433.
p2505[0...n] LR motor/load load revolutions / Mot/load load rev
CU250S_V (Position Access level: 1
control)
Can be changed: C(25)
CU250S_V_CAN
Unit group: -
(Position control)
Min
CU250S_V_DP
-1048576
(Position control)
CU250S_V_PN
(Position control)
Description: Sets the load revolutions for the gearbox factor between the motor shaft and load shaft.
Gearbox factor = motor revolutions (p2504) / load revolutions (p2505)
Dependency: Refer to: p0432, p0433, p2504
Note: The gearbox factor between the encoder shaft and the motor shaft is set using p0432 and p0433.
p2506[0...n] LR length unit LU per load revolution / LU per load rev
CU250S_V (Position Access level: 1
control)
Can be changed: C(25)
CU250S_V_CAN
Unit group: -
(Position control)
Min
CU250S_V_DP
1 [LU]
(Position control)
CU250S_V_PN
(Position control)
Description: Sets the neutral length units LU per load revolution.
Therefore, for a rotary encoder, a reference is established between the physical arrangement and the neutral length
units LU used in the drive.
Example:
Rotary encoder, ballscrew with 10 mm/revolution, 10 mm should be broken down to units of µm (i.e. 1 LU = 1 µm).
--> One load revolution corresponds to 10000 LU
--> p2506 = 10000
Note: The position controller can only process position setpoints in the interpolator clock cycle (IPO clock cycle) in integer
length units (LU, Length Unit). This is the reason that speed setpoints that are not a multiple integer of 1 LU per IPO
clock cycle can only be realized as an average. The result speed setpoint steps are especially noticeable for a high
loop gain or when the precontrol is active. Increasing p2506 counteracts this behavior.
p2507[0...n] LR absolute encoder adjustment status / Abs_enc_adj stat
CU250S_V (Position Access level: 1
control)
Can be changed: U, T
CU250S_V_CAN
Unit group: -
(Position control)
Min
CU250S_V_DP
0
(Position control)
CU250S_V_PN
(Position control)
Description: Activates the adjustment and display of the status of the adjustment for absolute encoders.
Value: 0:
1:
2:
3:
Dependency: Refer to: p2525, p2598, p2599, p2733
Caution: For rotating absolute encoders, when adjusting, a range is set up symmetrically around zero with half of the encoder
range, within which the position must be re-established after switch-off/switch-on. In this range, it is only permissible
that the encoder overflows.
After the adjustment has been completed, it must be guaranteed that the range is not exited. The reason for this is
that outside the range, there is no clear reference any longer between the encoder actual value and mechanical
system.
384
Error occurred while adjusting
Absolute encoder not adjusted
Absolute encoder not adjusted and encoder adjustment initiated
Absolute encoder adjusted
Calculated: -
Scaling: -
Unit selection: -
Max
1048576
Calculated: -
Scaling: -
Unit selection: -
Max
2147483647 [LU]
Calculated: -
Scaling: -
Unit selection: -
Max
3
Data type: Integer32
Dyn. index: DDS, p0180
Func. diagram: 4010, 4704, 4711
Factory setting
1
Data type: Unsigned32
Dyn. index: DDS, p0180
Func. diagram: 4010
Factory setting
10000 [LU]
Data type: Integer16
Dyn. index: EDS, p0140
Func. diagram: 4010
Factory setting
1
SINAMICS G120 CU250S-2 Control Units
List Manual, 09/2017, A5E33842890