FB#.SIGNALAMPLITUDE
Description
This parameter returns the measured signal amplitude of a connected resolver or sine/cosine encoder.
It is only available on the following encoder types:
- Sine Encoder with Halls
- Sine Encoder without Halls
- EnDat Analog
- Resolver
- HIPERFACE
- BiSS-B with SinCos
These commands are not recordable on FB1 and FB2.
For recording on FB1 and FB2, see FB#.MONITOR#.SOURCE and FB#.MONITOR#.DATA.
Example
Usage
The signal amplitude measurement is used to detect if the sine/cosine signals from the encoder have an acceptable amplitude. If the amplitude is outside the acceptable range, a fault is thrown.
The signal amplitude is approximately equal to the length of the sine/cosine signal vector: sqrt(sin2 + cos2). If the signal amplitude changes with angle, the sine and cosine signals have different amplitudes.
Target signal strengths and acceptable ranges are in the table below:
| Encoder | Nominal | Maximum | Minimum |
|---|---|---|---|
| Resolver | 3.5 Vms | 3.86 Vrms | 2.25 Vrms |
| Sin/Cos | 0.3536 Vrms (1 V pk-pk) | 0.495 Vrms (1.4 V pk-pk) | 0.1767 Vrms (0.5 V pk-pk) |
Code
--> FB3.SIGNALAMPLITUDE
1.123 [Vrms]
Versions
| Action | Version | Notes |
|---|---|---|
| Implemented | 02-00-02-000 |
General Information
|
Type |
Read Only |
|
Units |
Vrms |
|
Range |
N/A |
|
Default Value |
N/A |
|
Stored in Non-Volatile Memory |
No |
Variants Supported
All variants are supported.
Fieldbus Information
|
ID |
Instance |
Attribute |
Name |
Data Type |
Access |
User Mappable |
|---|---|---|---|---|---|---|
|
30260 |
1 |
30260 (0x7634) |
FB1.SIGNALAMPLITUDE |
Signed32 |
Read Only |
Yes |
|
30261 |
1 |
30261 (0x7635) |
FB2.SIGNALAMPLITUDE |
Signed32 |
Read Only |
Yes |
|
30262 |
1 |
30262 (0x7636) |
FB3.SIGNALAMPLITUDE |
Signed32 |
Read Only |
Yes |
|
30263 |
1 |
30263 (0x7637) |
FB4.SIGNALAMPLITUDE |
Signed32 |
Read Only |
Yes |
|
30264 |
1 |
30264 (0x7638) |
FB5.SIGNALAMPLITUDE |
Signed32 |
Read Only |
Yes |
|
Parameter |
PNU |
Data Type |
Access |
Units |
|---|---|---|---|---|
|
FB1.SIGNALAMPLITUDE |
30260 |
Float |
Read Only |
- |
|
FB2.SIGNALAMPLITUDE |
30261 |
Float |
Read Only |
- |
|
FB3.SIGNALAMPLITUDE |
30262 |
Float |
Read Only |
- |
|
FB4.SIGNALAMPLITUDE |
30263 |
Float |
Read Only |
- |
|
FB5.SIGNALAMPLITUDE |
30264 |
Float |
Read Only |
- |
