Micronor MR430 Series User manual

© COPYRIGHT 2018, MICRONOR INC.
CAMARILLO, CALIFORNIA
UNITED STATES OF AMERICA
MR430 Series
ZapFREE®Fiber Optic
Absolute Encoder System
Instruction Manual
Doc No: 98-0430-11
Revision A3 dated 17-August-2018
MICRONOR INC.
900 Calle Plano, Suite K
Camarillo, CA 93012 USA
PH [phone]
FX [phone]
[e-mail]
www.micronor.com
For Support in Europe:
MICRONOR AG
Pumpwerkstrasse 32
CH-8105 Regensdorf
Switzerland
PH [phone]
FX [phone]
[e-mail]
www.micronor.com
Notice of Proprietary Rights
The design concepts and engineering details embodied in this manual, which are the property of
MICRONOR INC., are to be maintained in strict confidence; no element or detail of this manual is to be
spuriously used, nor disclosed, without the express written permission of MICRONOR INC. All rights are
reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior
written permission from MICRONOR INC.

MICRONOR INC.
MR430 Fiber Optic Position Sensor System
Page 2 of 50
Revision History
Revision
Date
Notes
A
8-March-2018
Initial Release
A1
21-June-2018
Product release
A2
11-July-2018
Added MR431 sensor diagrams
A3
17-Aug-2018
Added System Loss Budget to MR430 Controller specifications

MICRONOR INC.
MR430 Fiber Optic Position Sensor System
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Table of Contents
1. Product Description ............................................................................................. 5
1.1 Position Sensor Background .........................................................................................5
1.2 Fiber Optic Position Sensor ..........................................................................................5
1.3 Features.........................................................................................................................6
2. Initial Preparation .................................................................................................7
2.1 Unpacking and Inspection ............................................................................................7
2.2 Damage in Shipment ....................................................................................................7
2.3 Standard Contents ........................................................................................................7
3. Installation and Operation.................................................................................... 8
3.1 Mounting the Sensor Unit .............................................................................................8
3.2 Mounting the Controller Unit........................................................................................9
3.3 USB (J2) and RS485/SSI Interface Connections (J3) ...................................................11
3.4 Optical Connection .....................................................................................................12
3.5 Blink Status and Error Codes ......................................................................................12
3.6 System Start-Up Without PC Computer .....................................................................13
3.7 Functional System Overview.......................................................................................14
3.8 Turn-Counter and Turn-Counter Size..........................................................................16
3.9 Multi-Turn Operation ..................................................................................................17
3.10 Battery Backup for Multi-Turn Operation ...................................................................17
3.11 SSI Interface ................................................................................................................18
3.12 Voltage Output ...........................................................................................................20
3.13 Isolated Current Output (4-20mA) ..............................................................................22
3.14 Digital Set Point ..........................................................................................................23
4. Serial Communication – Modbus ....................................................................... 25
4.1 USB-Serial Emulator ....................................................................................................25
4.2 Serial Interface Specification.......................................................................................26
4.3 Physical Connection for Modbus operation ...............................................................26
4.4 Serial Bus Termination Resistor...................................................................................27
4.5 MODBUS Communications Protocol ..........................................................................27
5. MR430 - Error Handling and Troubleshooting.................................................... 33
5.1 Explanation of Status and Error Handling...................................................................33
5.2 Explanation of Status and Error Indication .................................................................33
5.3 Reading the Error Counters ........................................................................................38
5.4 About Statistical Read Error Determination................................................................38
5.5 Warranty Information ..................................................................................................40
6. Specifications ..................................................................................................... 41
6.1 MR430 Controller Specification ..................................................................................41
6.2 MR431 Sensor Specifications ......................................................................................42

MICRONOR INC.
MR430 Fiber Optic Position Sensor System
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7. ZapView®-MR480 Software ............................................................................... 43
8. MR430 Theory of Operation............................................................................... 43
9. Mechanical Reference Drawings......................................................................... 44
9.1 MR430-1 Controller.....................................................................................................44
9.2 MR431 Sensor .............................................................................................................44
9.3 MR439 M-POF Cabling...............................................................................................44
List of Figures
Figure 1. Micronor MR430 Fiber Optic Position Sensor System .................................................5
Figure 2. Three Methods of Mounting MR431 Sensor – (a) Synchro Mount with Clamps, (b) Synchro Mount
with Flat Washers, and (c) Face Mount. ...............................................................................8
Figure 3. Mounting MR430 Controller on DIN Rail .....................................................................9
Figure 4. Connections to MR430-1 Controller...........................................................................10
Figure 5. Location of RS485/Modbus RTU, SSI and USB Connections .....................................11
Figure 6. J3-Connector Pin Assignments...................................................................................11
Figure 7. Plug for J3 Connector.................................................................................................11
Figure 8. Location of Recessed Home Button ...........................................................................13
Figure 9. Block Diagram of MR430 System ...............................................................................14
Figure 10. Suggested Battery Backup Circuit............................................................................17
Figure 11. SSI Interface Connector – J3 (10 pin). ......................................................................18
Figure 12. SSI Single Transmission Timing ................................................................................19
Figure 13. Mode 1 Voltage Output ...........................................................................................20
Figure 14. Mode 2 Voltage Output ...........................................................................................20
Figure 15. Mode 3 Voltage Output ...........................................................................................21
Figure 16. Analog Output With An Oscillating Shaft Input .......................................................21
Figure 17. Isolated 4-20mA Connection...................................................................................22
Figure 18. Mode 1 Current Output............................................................................................22
Figure 19. Mode 2 Current Output............................................................................................23
Figure 20. Block Diagram of the Fiber Optic Position Sensor System ......................................43
List of Tables
Table 1. Table of Error Codes....................................................................................................35

MICRONOR INC.
MR430 Fiber Optic Position Sensor System
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1. Product Description
1.1 Position Sensor Background
Position sensors are typically used to provide an absolute position from a mechanical moving device to a
controller unit. The position information is either used to measure a position or to close the servo loop for
an automatic positioning system. The key characteristics of an absolute position sensor are:
•Range
•Accuracy
•Resolution
•Time response of the actual position
1.2 Fiber Optic Position Sensor
The MR430 series fiber optic position sensor system is an innovative all-optical design immune to any
electro-magnetic interference such as lightning, radiation, magnetic fields and other harsh environmental
conditions. The fiber optic aspect of the sensor also makes it perfectly suited for sensing position at high
voltage power lines, within high magnetic fields (MRI) or explosive atmospheres. This innovative product
measures absolute angular position from 0° to 360° with 13-bit resolution and distances up to 100 feet.
Figure 1. Micronor MR430 Fiber Optic Position Sensor System
The sensor utilizes Plastic Optical Fiber for sensing the exact position of the sensor disk. There are two
fibers, the Transmit fiber sends a short light pulse of light at a wavelength of 645nm to the sensor. A unique
code on the sensing disk impresses the code image to the receiving imaging fiber. The controller analyzes
the code impressed on the Receiving fiber and determines the exact position. Since the sensor is
electrically passive, it can be deployed in EMI/RFI intense environment without being disturbed by such
interference.
The position signal is measured and updated at a rate of 1.2 kHz. The controller provides a host of
interface capabilities, including: scalable analog voltage and current outputs, digital SSI (Serial
Synchronous Interface) output, USB, and a Modbus compatible serial interface.

MICRONOR INC.
MR430 Fiber Optic Position Sensor System
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1.3 Features
•Absolute Angular Position with 13-bit (8192) Resolution
•Multi-turn tracking to 12-bits (4096 turns)
•Immune to Electrical Interference
•Zero Emitted Electrical Radiation
•MRI Safe Sensor, Non-Metallic
•Transmission without Interference up to 30m (100 feet)
•Utilizes 1mm diameter POF fibers
•Multiple interfaces built-in into one unit
oSSI Interface
oModbus RTU via RS422/RS485 serial interface.
oUSB Interface
oTwo Scalable Analog Position Outputs (±10V and 4-20mA)
oOne Programmable Digital Set-Point
•User settable Zero Position
•External Zero Position input.
•Powers from +18V DC to +28VDC
•Low Energy consumption, < 1.5 Watts
•ZapView® Setup Software
•Small form factor Sensor (size 11)
•Ex classified “Inherently Safe, Simple Mechanical Device”, i.e. sensor can be installed in all manner
of hazardous location or combustible atmosphere – mines, gas, vapors or dust.

MICRONOR INC.
MR430 Fiber Optic Position Sensor System
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2. Initial Preparation
2.1 Unpacking and Inspection
The unit was carefully inspected mechanically and electrically before shipment. When received, the
shipping carton should contain the following items listed below. Account for and inspect each item before
the carton is discarded. In the event of a damaged instrument, write or call your nearest MICRONOR office
in the U.S. A. Please retain the shipping container in case reshipment is required for any reason.
2.2 Damage in Shipment
If you receive a damaged instrument you should:
1. Report the damage to your shipper immediately.
2. Inform MICRONOR
3. Save all shipping cartons.
Failure to follow this procedure may affect your claim for compensation.
2.3 Standard Contents
MR431 Sensor:
•MR431 Sensor Device with customer-specified POF pigtail length
•Test Protocol Sheet
•Instruction Manual (this document, one soft copy supplied with each shipment)
MR430-1 SSI Controller Module:
•MR430-1 Controller Module
•Detachable Phoenix Terminal connector plugged into unit.
•ZapView®430 Instruction Manual (Paper Copy)
•MR232-3 USB Cable
•The following documents are supplied on a CDROM or USB Stick:
oMR430 ZapFree®Fiber Optic Absolute Encoder Instruction Manual (PDF file)
oZapView®430 Setup Software
oZapView®430 Instruction Manual
Available accessories (must be ordered separately):
•MR431A - set of 3, non-metallic synchro clamps and screws
•MR430-99-01 (J2) Breakout Cable for connection to SSI and RS485 interfaces
•MR498 cable assemblies (for extended links)
•MR498 inline mating adapters for use with MR498 extension assemblies

MICRONOR INC.
MR430 Fiber Optic Position Sensor System
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3. Installation and Operation
3.1 Mounting the Sensor Unit
The MR431 sensor unit is a Size 11 standard servo mount configuration with Ø6mm shaft. Figure 2
illustrates 3 methods of mounting the sensor. Detailed mounting instructions and dimensions can be found
in the MR431 Reference Drawing in Section 9.2.
a) Synchro clamps (set of 3x clamps and screw available as Micronor P/N MR431-1101)
b) Flat washers
c) Face mount
Figure 2. Three Methods of Mounting MR431 Sensor – (a) Synchro Mount with Clamps, (b)
Synchro Mount with Flat Washers, and (c) Face Mount.
IMPORTANT NOTES
The sensor requires secure installation to meet published specifications.
No excessive force or load should be applied while installing.
The sensor should be mounted to a flat surface or bracket.
A flexible shaft coupling should be used when mounting to an external motor shaft.

MICRONOR INC.
MR430 Fiber Optic Position Sensor System
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3.2 Mounting the Controller Unit
The controller unit mounts on standard 35mm DIN rail, or it can be screw mounted to a wall or cabinet.
•For DIN rail mounting, insert clip to the unit and then clip onto DIN rail by bending the clip tabs
toward of the enclosure.
•When screw mounting, remove clip from enclosure and use screws to affix clip to the wall and
then clip enclosure onto the plastic clip. Both mounting schemes are shown below.
IMPORTANT:
•The optical power emitted by the Controller is classified both Eye-Safe (Class 1) and Inherently
Safe (Ex op is).
•By design, the optoelectronic Controller must be installed in a non-hazardous, Safe Area.
Figure 3. Mounting MR430 Controller on DIN Rail

MICRONOR INC.
MR430 Fiber Optic Position Sensor System
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The Sensor Controller requires
24V DC and consumes
approximately 60mA.
A number of interface options
exist:
Voltage and current outputs are
scalable using the ZapView®
software.
The 4-20mA current output is
isolated and requires an external
voltage source.
The Homing input requires a
18V to 24V logic or switch signal.
Figure 4. Connections to the MR430-1 Controller
The SSI interface usually connects to a PLC, servo drive unit or other position indicator. The SSI allows for
clock speeds of up to 250kHz and block read-out speeds up to 10kHz. Signals are available on connector
J3 which is shared with the Modbus interface signals.
The Modbus/RTU interface is available at connector J3. Controller units are slave devices and the device
address is programmable via this interface or the USB interface. Standard Baud rate is 57,600, 1 Stop Bit,
No Parity. The default Common Device Address is 235.
The USB interface is a serial FTDI Virtual Communications Port (VCP) serial emulator. It operates exactly
the same way and the protocol must be Modbus/RTU. Whenever the USB is connected and active, the
Modbus/Interface is disabled.
Electrical Connections to the Sensor Controller (J1)
1
+24V
Power Supply, 65mA typical
2
GND
3
Home
24V signal will set position to pre-defined value. (normally 0)
4
AUXin
24V signal. Reserved for future use.
5
GND
6
Set Point Out
5V Logic, goes Hi if a user-defined set point is reached.
7
Voltage Position Out
-10V to +10V, user defined scale based on position
8
GND
9
I (+)
4-20mA isolated current loop, user defined scale based on position,
user must provide a voltage source.
10
I (-)
Detachable Screw Terminal accepts 14 to 30AWG wires
Mating Terminal Connector: Phoenix P/N 1803659 (one supplied with unit)
Figure 4. Connections to MR430-1 Controller