Micronor MR340-1 User manual

© COPYRIGHT 2018-2022, MICRONOR AG
REGENSDORF, SWITZERLAND
MR340-1
Fiber Optic Incremental Encoder
DIN Rail Mount Controller
Instruction Manual
Includes MR343 Linear Encoder
Application Information
Document: 98-0340-12
Revision: C
For Sales & Support in North America:
MICRONOR SENSORS, INC.
2085 Sperry Ave, Suite A-1
Ventura, CA 93003 USA
[phone]
[e-mail]
www.micronor.com
HQ and Worldwide Support:
MICRONOR AG
Pumpwerkstrasse 32
CH-8105 Regensdorf
Switzerland
[phone]
[e-mail]
www.micronor.ch
Notice of Proprietary Rights
The design concepts and engineering details embodied in this manual, which are the property of MICRONOR AG,
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 AG. 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 AG.
IMPORTANT NOTE
The MR340-1 Controller is a rebranding, part number change only
of the original MR302-1 DIN Controller. Any references to MR302-1
are applicable to the MR340-1 and vice versa. In addition, the former
MR303 Linear Encoder is now the MR343, and the former MR304
Mini Rotary Encoder is now the MR341.
The core dual wavelength 850nm/980nm optical technology of the
MR302 series replaces the 850nm/1300nm technology of the earlier
MR320 series, becoming the MR340 series. For more information on
the MR340 series Controller and Encoders and their compatibility
with earlier models, please consult Application Note AN127.

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Revision History
REV
Date
Technical
Representative
Notes
A
6/22/2018
DNH
Initial Release-Same as MR302-1
B
3/6/2019
DNH
Analog output mode definition corrected in table
C
9/12/2022
DNH
•Changed all MR302-1 DIN Controller references to
MR340-1
•Changed all MR303 Linear Encoder references to
MR343
•Changed all MR304 Rotary Encoder references to
MR341
•Deleted references to obsolete MR302-2 / MR340-
0 OEM Controller (also formerly MR340-0)
•
Updated product ownership to Micronor AG

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Table of Contents
Revision History ...........................................................................................................2
1. Product Description ............................................................................................. 6
1.1 Incremental Encoder Background..................................................................6
1.2 Fiber Optic Incremental Sensor ..................................................................... 6
2. Initial Preparation .................................................................................................8
2.1 Unpacking and Inspection ............................................................................. 8
2.2 Damage in Shipment ..................................................................................... 8
2.3 Standard Contents.........................................................................................8
2.4 Warranty Information .....................................................................................9
3. Installation and Operation.................................................................................. 10
3.1 Mounting the Sensor Unit............................................................................ 10
3.2 Mounting the MR340-1 Controller Module.................................................. 11
3.3 Optical Connections to the Controller ......................................................... 12
3.3.1 Cleaning Fiber Optic Connections........................................................ 13
3.4 Electrical Connections To Controller............................................................ 14
Main Electrical Connections.................................................................. 14
Interfacing With a Motor Drive.............................................................. 15
SSI and RS485 Interface Connections (J3)............................................. 16
USB Interface (J2).................................................................................. 17
Programmable Analog Output – Current or Voltage Connections........ 17
3.5 How To Install the MR343 Linear Encoder ................................................... 19
Film Mounting and Handling With MR343............................................ 19
Initial Optical Power Level Referencing When Using Film..................... 21
Indexing for Linear Absolute Position ................................................... 22
3.6 Power-up or Periodic Optical Sensitivity Calibration.................................... 23
Optical sensistivity calibration for linear sensors ................................... 23
Optical sensititivty calibration for rotary sensors................................... 23
3.7 Initial System Configuration and Power-Up Examples.................................. 24
Rotary Encoder Configuration and Operation....................................... 24
Linear Encoder With Film And Using HOMING Function...................... 26
Linear Encoder With Film Without HOMING Region ............................ 28
4. Modbus Serial Communications......................................................................... 30
4.1 Modbus Serial Interface ............................................................................... 30
4.2 MODBUS Communications Protocol ........................................................... 32
4.3 Detailed Description of Each Function......................................................... 40
Counter (Register 0x001) ...................................................................... 40
Speed /RPM output (Register 0x003).................................................... 40
Voltage Mode (Register 0x200)............................................................. 41
Voltage Scale (Register 0x201).............................................................. 42

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Voltage Filter (Register 0x203).............................................................. 43
Current Mode (Register 0x204)............................................................. 44
Current Scale (Register 0x205).............................................................. 47
Current Filter (Register 0x207) .............................................................. 47
Counter Reset Mode (Register 0x208) .................................................. 48
Counter Reset (Register 0x209)............................................................. 49
Quadrature Edge Multiplier (Register 0x211)........................................ 49
Turn Direction (Register 0x20B) ............................................................ 50
Line Driver Output Voltage (Register 0x214)......................................... 51
Analog Output Select (Register 0x215)................................................. 51
EEPROM SET (FC05-2).......................................................................... 52
4.4 Error Handling and Troubleshooting ........................................................... 53
Explanation of Status and Error Handling ............................................. 53
Explanation of Status and Error Indication ............................................ 53
Reading The Error Counters ................................................................. 58
5. Specifications ..................................................................................................... 59
5.1 MR340-1 DIN Rail Mount Controller ............................................................ 59
5.2 MR343 Linear Sensor ................................................................................... 60
6. ZAPPY® 302 SOFTWARE................................................................................... 61
6.1 How To Install and Use Zappy® 302............................................................ 61
6.2 ZAPPY® Menu Screens................................................................................ 61
System Functions screen....................................................................... 61
User Functions screen........................................................................... 63
Service Functions screen....................................................................... 64
Command List screen ........................................................................... 65
7. MR340 Theory of Operation............................................................................... 66
8. MR340-1 Reprogramming the Firmware ............................................................ 68
8.1 DAMAGED Firmware Recovery ................................................................... 71
9. Mechanical Reference Drawings......................................................................... 72
9.1 MR340-1 Controller .....................................................................................72
9.2 MR343 Linear Sensor ................................................................................... 72

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Figures
Figure 1. MR340 Series Fiber Optic Encoder System Family....................................... 6
Figure 2. Typical MR340 Encoder System connections to User’s Motion Control System 7
Figure 3. MR340 Controller works with MR343 Linear and all MR34X Rotary Sensors10
Figure 4. Keep LC Duplex connector ends protected when not in use ..................... 10
Figure 5. Mounting Controller to 35mm DIN Rail ..................................................... 11
Figure 6. Mounting Controller to Wall Using Screws................................................. 11
Figure 7. Connecting Sensor to Controller Optical Interface .................................... 12
Figure 8. Clean Receptacle with the supplied Cleaning Stick..................................... 13
Figure 9. Clean Optical Plug with supplied Clean Wipes .......................................... 13
Figure 10. Typical MR340 Encoder Sensor System connections to Motion Control System
........................................................................................................................... 14
Figure 11. J1-Connector Pin Assignments ................................................................ 15
Figure 12. Typical MR34X Rotary Encoder System connections to Motor Drive System15
Figure 13. Location of SSI, RS485/Modbus RTU, and USB Connections ................... 16
Figure 14. J3-Connector Pin Assignments ................................................................ 16
Figure 15. Hirose Plug for J3-Connector................................................................... 16
Figure 16. Connection for 4-20mA current loop ........................................................ 17
Figure 17. Connection for Voltage Output................................................................ 18
Figure 18. Positioning film inside MR343 sensor....................................................... 19
Figure 19. TD5334 Encoder Filmstrip dimensions..................................................... 20
Figure 20. Location of internal CAL button for initial optical level calibration ........... 21
Figure 21. ZAPPY® System Functions screen............................................................ 62
Figure 22. ZAPPY® User Functions screen................................................................ 63
Figure 23. ZAPPY® Service Functions screen............................................................ 64
Figure 24. ZAPPY® Command List screen ................................................................ 65
Figure 25. Block Diagram of MR340-1 Controller ..................................................... 66

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1. Product Description
1.1 Incremental Encoder Background
Incremental encoders are typically used to sense the motion and speed of a motor shaft.
Typically the encoder outputs two phase-shifted signals. Depending on the direction of
movement, the phase shift is either +90° or -90°, this signal is referred to as the Quadrature
Signal.
Typically these encoders incorporate electronics and are susceptible to electrical interferences
(EMI/RFI). Examples include:
•Pipe and tube welding produces extreme interference
•MRI machines operate under an extremely strong electromagnetic field
•Surgical robots must perform 100% reliably
•Aerospace actuators operate in and around other noise generating avionics
An all-optical, non-electronic passive solution such as the fiber optic encoder provides
completely immunity to such interferences.
1.2 Fiber Optic Incremental Sensor
The MR340 series is Micronor’s 3rd Generation fiber optic incremental encoder system. It’s
innovative all-optical design offers immunity 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 long distance speed and position
sensing over hundreds of meters without being affected by ground loop problems.
Figure 1. MR340 Series Fiber Optic Encoder System Family

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Figure 2. Typical MR340 Encoder System connections to User’s Motion Control 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 AG local
representative or Swiss HQ.
Please retain the shipping container in case re-shipment 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
MR340-1 Controller Module:
•MR340-1 Controller
•Instruction Manual (this document, one soft copy supplied per shipment when a
complete encoder/controller system is purchased.
MR341, MR342, MR344, MR345, MR346, MR348 Rotary Sensors:
•MR34X series sensor with optical interface option (IP-LC receptacle or Duplex LC
pigtail) as ordered. See individual data sheets for decoding of ordering part
number.
MR343 Linear Sensor:
•MR343 series sensor with Duplex LC optical pigtail as ordered. See individual data
sheet for decoding of ordering part number.
Both this Instruction Manual and ZAPPY® 302 software can be downloaded
from www.micronor.com

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2.4 Warranty Information
Warranty
MICRONOR AG warrants this product to be free from defects in material and workmanship for
a period of 1 (one) year from date of shipment. During the warranty period, we will, at our
option, either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local MICRONOR representative or contact
MICRONOR AG headquarters. You will be given prompt assistance and return instructions.
Send the instrument, transportation prepaid, to the indicated service facility. Repairs will be
made and the instrument returned transportation prepaid. Repaired products are warranted
for the balance of the original warranty period, or at least 90 days.
Limitations of Warranty
This warranty does not apply to defects resulting from unauthorized modification or misuse of
any product or part. This warranty also does not apply to Fiber Optic Connector interfaces,
fuses or AC line cords. This warranty is in lieu of all other warranties, expressed or implied,
including any implied warranty of merchantability of fitness for a particular use. MICRONOR
INC. shall not be liable for any indirect, special or consequent damages.
For sales and service in North America:
Micronor Sensors, Inc. Tel [phone]
2085 Sperry Ave, Suite A-1 Email [e-mail]
Ventura, CA 93003 URL www.micronor.com
USA
HQ and Worldwide Sales & Support:
Micronor AG Tel [phone]
Pumpwerkstrasse 32 Email [e-mail]
CH-8015 Regensdorf URL www.micronor.ch
SWITZERLAND

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3. Installation and Operation
3.1 Mounting the Sensor Unit
A broad range of MR34X rotary and linear sensors will work in conjunction with the MR340-1
Controller. Each MR34X sensor requires its own dedicated MR340-1 Controller.
MR34X series Rotary Encoders offer resolution up to 1024ppr.
MR343 series Linear Encoder is a special read-head sensor that can be used to measure linear
movement. It is constructed of both non-metallic and non-ferrous materials. The sensor is safe
for use within or around MRI equipment, or within other extreme electromagnetic fields.
Figure 3. MR340 Controller works with MR343 Linear and all MR34X Rotary Sensors
When installing the sensor, be careful not to bend the fiber excessively. It is recommended to
keep the minimum bend radius 25mm (1”) or larger. Ensure the fiber outlet at the encoder is
protected from excessive pulling or bending.
Figure 4. Keep LC Duplex connector ends protected when not in use
Make sure fiber optic connector tips are always covered when not in use. Always clean and
inspect the connector ends before mating to interface.