Danfoss vacon nx optbc User guide

vacon® nx

ac drives

optbc

resolver option board

user manual

Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/

Table of contents

Document code: DPD01362C

Date: 20.02.2018

1. Resolver option board OPT-BC ........................................................................................... 4

1.1 Note about absolute angle and different HW and SW versions ............................................... 4

1.2 Resolver basics ........................................................................................................................ 4

1.3 Resolver to digital conversion basics ....................................................................................... 5

1.4 Compatible resolver types........................................................................................................ 6

1.5 Resolver board features ........................................................................................................... 6

2. Configuration ................................................................................................ ..................... 7

2.1 Board parameters and monitoring values ............................................................................... 7

2.2 Connectors and jumpers .......................................................................................................... 8

3. Installation ....................................................................................................................... 14

3.1 Installing the option board ..................................................................................................... 14

3.2 Installing the resolver ............................................................................................................ 16

3.3 Additional cabling instructions ............................................................................................... 16

4. Diagnostics and troubleshooting ...................................................................................... 17

4.1 Fault handling ......................................................................................................................... 17

4.2 LED indicators ........................................................................................................................ 18

4.3 OPTBC Resolver error register bits ....................................................................................... 18

NOTE! You can download the English and French product manuals with applicable safety, warning and caution information from http://drives.danfoss.com/knowledge-center/technical-

documentation/.

REMARQUE Vous pouvez télécharger les versions anglaise et française des manuels produit sur le site http://drives.danfoss.com/knowledge-center/technical-documentation/.

4 Installation

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1. RESOLVER OPTION BOARD OPT-BC

This manual is valid for board versions VB00339i or later. The Resolver option board OPT-BC provides the user with an interface to use resolvers as feedback device to VACON® NXP Drive. The interface provides speed and position data. The OPT-BC includes also encoder simulation output (HTL level) and secondary encoder input (HTL-level).

1.1 Note about absolute angle and different HW and SW versions Due to differences in hardware and software, the angle given by OPTBC resolver board to application

can differ by 180 degrees in the same system. When replacing OPTBC resolver option board in existing installations, care must be taken that angle value does not change accidentally. To prevent this, it is recommended that encoder ID run is always executed when replacing OPTBC resolver option boards in existing installations. This will automatically correct the possible 180 degrees difference that might be induced when replacing OPTBC option board.

Following table shows which OPTBC resolver hardware and software combinations are compatible. For example, if you replace OPTBC with HW version G and software version V005 with OPTBC with hardware version K and software version V013 the angle does not change by 180 degrees. In this case, encoder ID run is not needed but still recommended.

HW & SW version

HW: G or prior, SW

V005 or prior

HW: H or later,

SW: V010, V011,

V012

HW: H or later,

SW: V013

HW: G or prior, SW: V005 or prior



✓

HW: H or later, SW: V010, V011, V012

 

HW: H or later, SW: V013

✓



 = Angles differ by 180 degrees ✓= Angles are the same

WARNING

Not performing encoder ID run after replacing OPTBC resolver option board prior to any other use of the AC drive may result in severe harm or injury to equipment and/or persons.

1.2 Resolver basics A resolver is a rotary transformer where the magnitude of the energy through the resolver windings

varies sinusoidal as the shaft rotates. A resolver contains one primary winding and two secondary windings, the SIN and COS windings. Primary winding is in the rotor of the resolver and secondary windings are in the stator. Secondary windings are mechanically displaced 90 degrees from each other. The primary winding is excited by an AC voltage called the reference voltage (Vr). The induced voltages in the SIN and COS Windings are equal to the value of the Reference Voltage multiplied by the SIN or COS of the angle of the input shaft from a fixed zero point.

Installation vacon 5

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Resolver signals

Why resolvers? When a Motion control application exists in a hot, humid, dusty, oily, or mechanically demanding

environment, a resolver-based system is the preferred choice.

1.3 Resolver to digital conversion basics The OPT-BC board sends the Excitation signal to the resolver, and resolver sends sin and cos

signals back to the board. In the OPT-BC board, sin and cos signals are converted to incremental encoder pulses by the ASIC circuitry (see picture 1). The incremental pulses are used for calculating rotation speed in the VACON® NXP control card. The conversion from resolver sin/cos signals to digital pulses is called RTD (Resolver To Digital conversion).

6 Installation

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Picture 1 Simulated encoder signals from RTD ASIC

1.4 Compatible resolver types Resolver Output voltage: 1.8V

rms

4.0V

rms

Resolver Input voltage: 1.3V

rms

7.5V

rms

Number of poles: Note

If the number of poles of the resolver is not 2, then the resolver can only work with a motor that has the same number of poles (e.g. a 6 pole resolver with a 6 pole motor). Maximum tracking rates assume that resolver has 2 poles.

NOTE

1.5 Resolver board features

14bit

16bit

Encoder Simulation Output Resolution

10bit

12bit

14bit

Encoder Simulation Pulses / rev

256

1024

4096

osition accuracy*

+/- 4 LSB

+/- 16 LSB

elocity accuracy*

+/- 4 LSB

+/- 4 LSB Excitation frequency

1-20kHz (adjustable with 1kHz steps)

Transformation Ratio

The output voltage of the resolver has to be between 1.8V

rms

and 4V

rms

Input voltage can be adjusted between 1.3V

rms

and 7.5V

rms.

Slots

Encoder Simulation Output

A,B, Z (max. pulse frequency 150kHz)

*tested in zero acceleration

Note: by selecting 16bit mode, you can improve only position accuracy. Velocity accuracy remains the same (14bit).

Encoder Simulation Pulses per Revolution and Maximum tracking rate depend on the number of resolver poles. Simulated Pulses / rev = 2R ∙ Resolver_Poles / 8 R = Encoder simulation output resolution

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