AXIS#.SENSORLESS.ISTART
Description
Sensorless Field-Oriented Control (SFOC) runs in open-loop when velocity is below a certain limit and automatically switches to closed loop when velocity goes above that limit. This limit is determined by AXIS#.SENSORLESS.RPMSTART. There is a hysteresis band to make the transition seamless.
At open-loop, a constant current is applied to the motor to accelerate and reach AXIS#.SENSORLESS.RPMSTART. This constant current is determined by AXIS#.SENSORLESS.ISTART.
-
- In the open-loop mode, AXIS#.SENSORLESS.ISTART value determines the maximum torque rather than the actual torque. The actual torque that is applied can be anywhere between 0 and this maximum torque depending on the load.
Versions
| Action | Version | Notes |
|---|---|---|
| Implemented | 02-03-03-000 |
|
General Information
|
Type |
Read/Write |
| Description | Sets the starting current for SFOC |
|
Units |
Arms |
|
Range |
0 to Drive’s Peak Current |
|
Default Value |
5% of Drive’s Peak Current |
|
Data Type |
Float |
|
Stored in Non-Volatile Memory |
Yes |
Variants Supported
All variants are supported.
Fieldbus Information
|
Command |
Index |
SubIndex |
Data Type |
Units |
Float Scale |
Access |
PDO Mappable |
|---|---|---|---|---|---|---|---|
|
AXIS1.SENSORLESS.ISTART |
5018h |
05h |
Signed32 |
- |
1000:1 |
Read/Write |
No |
|
AXIS2.SENSORLESS.ISTART |
5118h |
05h |
Signed32 |
- |
1000:1 |
Read/Write |
No |
|
ID |
Instance |
Attribute |
Name |
Data Type |
Access |
User Mappable |
|---|---|---|---|---|---|---|
|
7405 |
1 |
7405 (0x1ced) |
AXIS1.SENSORLESS.ISTART |
Signed32 |
Read/Write |
Yes |
|
72941 |
2 |
7405 (0x1ced) |
AXIS2.SENSORLESS.ISTART |
Signed32 |
Read/Write |
Yes |
|
Parameter |
PNU |
Data Type |
Access |
Units |
|---|---|---|---|---|
|
AXIS#.SENSORLESS.ISTART |
7405 |
Float |
Read/Write |
- |
