Bonfiglioli Vectron EM-ENC-02 Expansion Module Integration and Encoder Interface Guide

3.1 Voltage/Current Mode Switching (DIP Switch S3)

S3=OFF (right side): Voltage input mode (± 10V, input impedance 100k Ω)

S3=ON (left side): Current input mode (± 20mA, input impedance 250 Ω)

3.2 Programmable signal characteristic curve

The process of mapping an analog input signal to a reference value (frequency or percentage) is defined by two linear characteristic curves (Section 5.1.3), with four data points (X1/Y1 and X2/Y2) as parameters:

X-axis: Percentage of analog input signal (relative to ± 10V or ± 20mA full-scale)

Y-axis: Percentage of output reference value (relative to maximum frequency or maximum percentage)

3.3 Operation Mode 562

1- Bipolar: The complete ± 100% input range is mapped to the ± 100% output range (including directional control).

11- Monopolar: The negative input signal is mapped to 0 (no inversion).

21- Monopolar 2-10V/4-20mA: Suitable for standard industrial signals, cutting off the lower limit of input characteristics to 20%.

101- Bipolar Absolute Value: Bipolar input is mapped to unipolar output (in absolute value).

3.4 Tolerance Bands and Error Behavior

Tolerance Band 560: Set a zero dead zone to prevent frequent direction switching caused by signal noise (Chapter 5.1.6).

Error/Learning Behavior 563 (Chapter 5.1.7):

1 (Warning): A warning is issued when the signal is below 1V/2mA.

2 (Shutdown): When the signal is lost, follow the stop behavior 1 to slow down and stop the machine.

3 (Fault tripping): Immediately stop freely and report an error when the signal is lost.

3.5 Analog Input Calibration

Due to component tolerances, calibration can be performed through Adjustment 568 (Chapter 5.1.8):

Apply 0V (or 0mA) to the input and execute Adjustment=1.

Apply 10V (or 20mA) to the input and execute Adjustment=2.

Chapter 4: Analog Output Configuration and PTC Temperature Monitoring

4.1 Analog output (0-20mA)

EM-ENC-02 provides configurable 0-20mA analog output (Chapter 5.2):

Operation Mode 590: Select the actual value to be output (such as analog input value, speed, frequency, etc.).

Offset 585 and Amplification 586:

Offset: The zero offset of the output signal (% of 20mA).

Amplification: The slope of the output signal, adjustable from 5% to 1000%.

4.2 PTC Temperature Monitoring (Chapter 5.8)

EM-ENC-02 provides a dedicated PTC thermistor input (terminal X410B. 2) for motor winding temperature monitoring. The operation mode can be selected through Operation Mode Motor Temp. 570:

11: Warning only

12: Fault tripping (immediate)

13/14/15: Delayed fault tripping (1/5/10 minutes)

The PTC trigger threshold complies with DIN 44081 standard (response resistance value>2.6k Ω).

Chapter 5: CAN System Bus and Virtual Link

EM-ENC-02 integrates the same CAN system bus function as EM-SYS (Chapter 4), supports CANopen protocol stack (CiA DS301), and enables real-time data exchange between frequency converters.

5.1 Node Configuration

Node-ID 900: Set the node address (1-63). -1 is disabled, 0 is master mode.

Baud Rate 903: Supports baud rate settings from 50 kbps to 1000 kbps.

5.2 Terminal Resistance Configuration

The bus terminal is configured through DIP switches S1 and S2 (Chapter 4.1):

Passive terminal: S1=ON, S2=OFF

Active terminal: S1=ON, S2=ON (only allows activation at one location in the network)

5.3 Virtual Link and PDO Mapping

EM-ENC-02 supports transferring data between frequency converters through virtual links (Chapter 4.11.5):

TxPDO (Send): Package local data and send it over the system bus. Select data sources (such as control words, reference values, analog input values, etc.) through parameters 946-977.

RxPDO (receive): Receive data from the system bus and map it to locally available data sources (source numbers 700-729).

Extended reference value source (Chapter 5.5):

Both the analog input and encoder input of EM-ENC-02 can be used as reference value sources for the frequency converter, which can be selected through Reference Frequency Source 475 or Reference Percentage Source 476.

Chapter 6: Digital Ports and Fixed Frequency Expansion

The digital port EM-S1IOD (X410A. 7) of EM-ENC-02 can be configured as input or output through Operation Mode 558 (Chapter 5.7).

6.1 Digital Input Mode

When Operation Mode 558=0, the port is a digital input that can be used as a signal source (Operation Mode 320/520) for starting signals, fixed frequency selection, or fault reset.

6.2 Digital Output Mode

When Operation Mode 558=1, the port is a digital output, and the output function (such as operating status, arrival frequency, fault signal, etc.) can be selected through Operation Mode Output 559.

6.3 Eight segment fixed frequency

EM-ENC-02 expands the number of fixed frequencies by adding Fixed Frequency Change Over 3 131, allowing for up to 8 combinations of fixed frequencies to be selected (Chapter 5.7.1.1):

The three binary combinations (66, 67, 131) correspond to fixed frequencies 1-8 (parameters 480-488).

Chapter 7: Fault Diagnosis and Troubleshooting

EM-ENC-02 extends the fault diagnosis capability of the frequency converter, and common fault codes include (Chapter 7.1):

Analog input fault:

F1402: Analog input EM-S1INA signal fault (signal loss or overload), check the wiring and signal source.