Universal Encoder Module Features
Universal Encoder Module - Overview
The Universal Encoder Module can be used for both Geared Induction Motors and Gearless Permanent Magnet Motors to connect any type of encoder for closed loop operation.
To use the Elevator Core with an encoder which is referred to as closed loop you must use the Universal Encoder Module which can either be purchased as an option or factory fitted with the drive.
Option Module | Part Number | |
|---|---|---|
Universal Encoder Module | OPT-3-ENCU-IN |  |
Universal Encoder Module Feature Overview
When using the Universal Encoder Module additional features are available:
Feature | Notes |
|---|---|
Speed Feedback | Precise speed feedback at 0.1 resolution |
Encoder Communication Quality | Check that the encoder readings are stable |
Back EMF measurement | Measure the Back EMF for operation in Open Loop for Gearless Permanent Magnet Motors |
Real-time Encoder Offset | Read the real time encoder offset while the motor is running |
Single Channel Wire Break Detection | Check if any cable is broken or missing on any specific channel |
Encoder Fault Diagnostics | Module specific fault codes which can help diagnose any fault with the encoder |
Universal Encoder Module Update | Update the Universal Encoder Module so any new encoder types can be supported |
Extra Digital Inputs | Two freely programmable Digital Inputs are available taking the total number of Digital Inputs to 10 |
24V Supply | An additional 24V supply is available from the module |
Simulated Outputs | A and B channel outputs that can be used for simulation of their respective channels |
Universal Encoder Module Supported Encoder Types
The following encoders are supported by the Universal Encoder Module
Encoder Type | Variants |
|---|---|
TTL Incremental Encoder | Differential With & Without Z Channels |
HTL Incremental Encoder | Differential With & Without Z Channels |
EnDat | With & without incremental signals ECN1313 / ECN113 / ECN 413 / ECN 1325 / ECN 125 / ECN 425 |
SinCos | ERN 1387 With CLK & DATA lines |
Below is the answers to some commonly asked questions about the Universal Encoder Module
Question | Answer |
|---|---|
Does the module support all encoder types? | Yes, all encoders are supported by one module |
Does the module come as standard? | Yes the module can be factory fitted |
How do I setup the encoder for closed lop operation? | Use Group 6 to enter the encoder information |
Are there different encoder modules for different drive models? | No there is only one Universal Encoder Module. The one part code can be used with any Elevator Core. |
Universal Encoder Module - Back EMF Measurement
When using the drive to run a Gearless Permanent Magnet Motor in Open Loop the Back EMF must be entered into parameter P4-02 Motor Rated Voltage to run the drive with no encoder feedback. If this is not done the drive will loose control and trip.
Normally you have to either calculate the Back EMF or find the value from the motor nameplate/datasheet. This is not always easily available.
When using the Universal Encoder Module while in closed loop (encoder feedback enabled) you can read P0-32 Back EMF Measured value and enter that value into P4-02.
Note
To get an accurate measurement run the drive at a speed greater than 25% of the motor rated speed e.g if you are using a motor with rated speed of 160rpm then you would need to run at a speed of 40rpm or more (the closer to rated speed the more accurate the measurement).
Universal Encoder Module - Back EMF Measurement - Setup
To run the drive in open loop commission the drive as normal for a Gearless Permanent Magnet Motor.
Once this is complete follow the steps below:
Run the drive at >25% of maximum speed (P8-01)
While the drive is at a stable speed monitor P0-32. This will give you the back EMF value
Once the drive has stopped enter the value monitored from P0-32 into P4-02. As this is your Back EMF value.
Note
The drive can only be run in Open Loop with the ropes removed.
Parameter Number | Parameter Name | Units | Default | Available Settings | Access | Change During Run | Scaling | Size (Bytes) | CAN Register | CAN Sub Index | Modbus Register |
|---|---|---|---|---|---|---|---|---|---|---|---|
P0-32 | Back EMF Measured Value | Volts | 0V | 0 ... 1200V | RO | N | N/A | 2 | - | - | 10032 |
P4-02 | Motor Rated Voltage/Back EMF-PM Motors | Volts | Rating Dependent | Rating Dependent | RW | N | N/A | 2 | 2192h | 0 | 402 |
When operating Gearless Permanent Magnet Motors in closed loop this value can be set to 0.
When operating Gearless Permanent Magnet Motors (P4-01 = 3) in open loop (P6-05 = 0) the Phase-to-Phase back emf voltage at rated speed must be entered in this parameter.