Siemens SINAMICS S Series - F31115 (N, A) Encoder 1: Amplitude error track A or B (A^2 + B^2); F31116 (N, A) Encoder 1: Amplitude error monitoring track A + B

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Faults and Alarms

List of faults and alarms

3-1642

SINAMICS S List Manual (LH1), 07/2007

F31115 (N, A) Encoder 1: Amplitude error track A or B (A^2 + B^2)

Drive object: All objects

Reaction: A_INFEED: NONE

SERVO: ENCODER (IASC / DCBRAKE, NONE)

VECTOR: ENCODER (IASC / DCBRAKE, NONE)

Acknowledge: PULSE INHIBIT

Cause: The amplitude (A^2 + B^2) does not lie within the tolerance bandwidth (software monitoring function).

SMC20:

The nominal signal level of the encoder must lie in the range 375 mV to 600 mV (500 mV -25 % / +20 %).

On the other hand, the response threshold is < 230 mV (frequency characteristic).

SMC10:

The nominal signal level is at 2900 mV (2.0 Vrms). The response threshold is < 1070 mV.

Fault value (r0949, interpret decimal):

Low word:

Signal level, track A (16 bits with sign).

High word:

Signal level, track B (16 bits with sign).

SMC20:

A signal level of 500 mV peak value corresponds to the numerical value 5333 hex = 21299 dec.

SMC10:

A signal level of 2900 mV peak value corresponds to the numerical value 6666 hex = 26214 dec.

See also: p0491 (Motor encoder fault response ENCODER)

Remedy: - check that the encoder cables are routed in compliance with EMC.

- check the plug connections.

- replace the encoder or encoder cable.

- check the Sensor Module (e.g. contacts).

- with measuring systems without their own bearing system: Adjust the scanning head and check the bearing system

of the measuring wheel.

- for measuring systems with their own bearing system: Ensure that the encoder housing is not subject to any axial

force.

Reaction upon N: NONE

Acknowl. upon N: NONE

Reaction upon A: NONE

Acknowl. upon A: NONE

F31116 (N, A) Encoder 1: Amplitude error monitoring track A + B

Drive object: All objects

Reaction: A_INFEED: NONE

SERVO: ENCODER (IASC / DCBRAKE, NONE)

VECTOR: ENCODER (IASC / DCBRAKE, NONE)

Acknowledge: IMMEDIATELY

Cause: The amplitude of the rectified encoder signals A and B is not within the tolerance bandwidth (hardware monitoring).

The nominal signal level of the encoder must lie in the range 375 mV to 600 mV (500 mV -25 % / +20 %).

On the other hand, the hardware response thresholds are at < 176 mV and > 1.35 V.

Fault value (r0949, interpret decimal):

Low word: Signal level, track A (16 bits with sign).

High word: Signal level, track B (16 bits with sign).

A signal level of 500 mV corresponds to the numerical value 5333 hex = 21299 dec.

These analog values are not measured at the same time with the hardware fault output.