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

EtherNet/IP
Name	ID	Hex	Data Type	Access	Units
FB1.SIGNALAMPLITUDE	30260	7634	Signed32	Read Only	-
FB2.SIGNALAMPLITUDE	30261	7635	Signed32	Read Only	-
FB3.SIGNALAMPLITUDE	30262	7636	Signed32	Read Only	-
FB4.SIGNALAMPLITUDE	30263	7637	Signed32	Read Only	-
FB5.SIGNALAMPLITUDE	30264	7638	Signed32	Read Only	-

PROFINET
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	-