Micronor MR320 Series User manual

MICRONOR INC.
750 Mitchell Road
Newbury Park, CA 91320 USA
PH: (805) 499 - 0114
FX: (805) 499 –6585
[email protected]
www.micronor.com
For Support in Europe:
MICRONOR AG.
Pumpwerkstrasse 32
CH-8105 Regensdorf
Switzerland
PH: [phone]
FX: [phone]
[email protected]
www.micronor.com
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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
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© COPYRIGHT 2004-2011, MICRONOR INC.
NEWBURY PARK, CALIFORNIA
UNITED STATES OF AMERICA
MR320 Series
ZapFREE® Fiber Optic Incremental Encoder System
Installation Guide
Doc No: MR320-INSTALL
Rev A2: 10-31-2011

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This Setup Guide is intended to guide you through the installation and
initial setup. A comprehensive User Manual is supplied on the Zappy™
CDROM (supplied with the MR320 module) or can be downloaded via this
link: http://www.micronor.com/products/files/MR320/ZAPPY.zip
A complete fiber optic encoder system consists of:
•Sensor (MR322, MR324, MR326 or MR328)
•Controller Module (MR320)
•Additional Duplex LC optical assemblies, if required (MR320-D06CXX or user supplied cabling.)
•Additional Duplex LC Mating Adapters, if required to interconnect link cables (MR320C or user supplied)
IMPORTANT SYSTEM NOTES
Always keep Optical Connectors Clean!
Two-way optical loss cannot exceed 12.5 dB
Each connector must meet Duplex LC-UPC performance with multimode return loss > 24dB
What optical signals do you need?
If you require only the direct A+B quadrature outputs,
then this Quick Setup Guide is all you should need.
If you plan to use the Multiplier, Divider, Position Counter,
Analog Outputs or Serial Interface, then you to need to
install the ZAPPY™software and reference the detailed
MR310/MR320 User Manual. These files are included on
the Resource CD supplied with the MR320 module or can
be downloaded via a single ZIP file at:
http://www.micronor.com/products/files/MR320/ZAPPY.zip
Quick Connections:
Step 1 Connect optical link between Sensor and Module
Step 2 For A+B push-pull quadrature outputs, connect to App and Bpp terminals.
For A+B line driver outputs, connect to A+/A-/B+/B- terminals
Step 3 Connect +24VDC to +Vs and 0V to GND terminals.
Step 4 For first time installation, it is necessary to “calibrate” the encoder system. While rotating the Encoder
shaft,use the Wago tool to depress the RESET button on the Module. If the Aand BLED lights blink
ON/OFF, then system is "calibrated" and functioning properly.

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MR320 Electrical Connections:
J2 - Terminal
1
Divider A+ (5V)
2
Divider A+ +24V push-pull
3
GND
4
Divider B+ (5V)
5
Divider B+ +24V push-pull
6
GND
7
GND
8
-10V to +10V Out (analog)
9
GND
10
4-20mA Out (analog)
J3 RS422/485 Serial I/O
1
GND
2
+5V Output (10mA max)
3
TX+
4
TX-
5
RCV+
6
RCV-
J1 - Terminal
1
A+ Line Driver (5V)
2
A- Line Driver (5V)
3
GND
4
B+ Line Driver (5V)
5
B- Line Driver (5V)
6
GND
7
App +24V push-pull
8
Bpp +24V push-pull
9
GND (power)
10
+Vs power(+15V to +32V)
11
Counter RESET (+24V)
12
Shield
IMPORTANT NOTES:
Line Driver outputs are short circuit protected.
The 24V push-pull digital outputs are short circuit protected.
Avoid any long-term short circuits on outputs. (Max 5 min)
Analog output polarity (direction) may be inverted by changing
the Direction parameter using the ZAPPY™ Setup Program.
The analog voltage output delivers up to 10mA current and is
short circuit protected.
The current loop output provides 0-24mA
B+ (8)
Line Driver (5V Out)
MAX4031
24V Driver
7272
J1
Encoder DIRECT Outputs
Power Supply +15V to +30V
Chassis (12)
B+ (4)
B- (5)
GND (3)
A+ (1)
A- (2)
GND (6)
B
A+ (7)
GND (9)
+24V Supply (10)
100 ohm
A
B+ (8)
Line Driver
(5V Out)
24V Driver
7272
J2
Encoder DIVIDED Outputs
Analog Outputs
B+ (4)
GND (3)
A+ (1)
GND (6)
B
A+ (7)
GND (9)
A
GND (6,9)
±10V (8)
4..20mA (10)
J3
RS422/485 Serial Interface
9600 Baud, 1 Start, 1 Stop, No Parity
TX+ (3)
TX- (4)
GND (1)
+5V (2)
10mA max
RCV+ (5)
RCV-(6)

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Sensor-Module Optical Connection
The optical connection between the Encoder and Sensor must be made using 62.5/125µm multimode optical fiber.
This is the same fiber used in local area networks (LANs). The cable ends must be terminated with high quality
Duplex LC and meet these optical performance requirements: Insertion loss <0.5dB, Return loss >24dB, and meets
TELCORDIA GR-326-CORE endface geometry specifications.
Sensor-Module Initialization:
The first time after initial installation, the MR320 module must be initialized as follows:
The encoder must be rotating at the same time that the RESET button on the MR320 module is being depressed.
This initialization calibrates the combination of the sensor, optical link and MR320 control unit. It needs to be
executed only once after initial installation –or any time the optical system (loss) is changed.
The RESET button initiates a gain calibration of the optical input amplifier. This procedure may be executed as many
times as required. However, once this initial calibration has been performed, the unit will retain calibration as long as
the system arrangement is unchanged –i.e. no change in optical loss.
Fiber Optic Connector Cleaning:
IMPORTANT INFORMATION ABOUT FIBER OPTIC CONNECTORS
Fiber Optic connectors must be kept clean from dust and other contaminants.
Always keep unmated connectors covered with an appropriate dust cap.
Do not touch the connector ends.
Micronor supplies the MR321C cleaning kit with every system order. Before mating - clean BOTH connector ends as
shown below.

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MR320 Error Messages –Blink Codes
In normal operation, the PWR LED is continuously On. Approximately every 50 seconds the PWR LED blinks indicating
execution of the internal Auto Calibration cycle, which is normal. This Auto Cal cycle only executes when the encoder is
moving. The PWR LED starts blinking when a change or error in operation occurs. The number of blinks corresponds
to an error code as shown below. Consult Section 7.5 of MR320 User Guide for additional information.
Blinks
Description –Cause –Remedy
1
EEPROM Error: Power down unit and re-initialize. If error persists, contact Factory.
2
2.5V Reference Voltage is out of tolerance: Contact Factory
3
Internal +5V Power Supply Voltage is out of tolerance: Contact Factory
4
Internal +12V Power Supply is out of tolerance: Contact Factory
5
The optical encoder cannot be calibrated properly
Possible reasons:
Too much or too little optical power
High insertion loss in the data link
NOTE: Five blinks indicate that the input optical AMPLIFIER is either at the minimum (3) or
maximum GAIN (20) setting. If you install ZAPPY software and use the Diagnostics Mode, then
allowable GAIN range is 3-20.
When the amplifier is at its maximum GAIN setting (20), the reason is most likely:
•High loss within the optical link –usually a connector problem. Install ZAPPY and run
DIAGNOSTICS Mode. Consult User Guide for additional information.
•Defective encoder
•Defective module
When the amplifier is at its minimum GAIN setting (3), the reason is most likely:
•Power is too high
•Defective module
Contact Micronor factory or distributor for additional troubleshooting assistance.

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How To Install ZAPPY Software
What is ZAPPY Software?
ZAPPY software is run on a PC and allows user to set the operating parameters of various functions (analog outputs,
position counter, etc.), run Diagnostics to verify proper operation as well as to certify the fiber optic connections. Consult
Section 5.9 of the MR3XX User Guide for detailed instructions but a summary follows here.
What do I need to install ZAPPY Software?
You will need the following:
•ZAPPY Installation CDROM
•An IBM-compatible PC running Windows XP
•One of the following cable adapters:
oIf PC has available serial port, use MR232-1 RS422-to-RS232 Adapter Cable
oIf PC has available USB port, use MR232-2 RS422-to-USB Adapter Cable
How do I install ZAPPY Software?
1. If using MR232-2 USB Adapter cable, first install USB software per supplied instructions.
2. Run SETUP.EXE on ZAPPY CDROM and install ZAPPY.
3. Connect the MR320 to either serial or USB port. Turn on power to MR320 module.
4. Run ZAPPY software. If using MR232-2 USB Adapter cable or port other than COM1, be sure proper COM port
number is entered at ZAPPY Start-Up Screen per example below. NOTE: Version 3.5.1 of ZAPPY will find the
MR320 automatically.

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How To Test The Optical Link using ZAPPY
How can I verify if the Encoder/Module is properly connected and the optical connections meet
requirements?
1. Click on [Diagnostics]. If the encoder is not rotating, you will get the following warning screen:
2. While rotating the shaft (RPM-Too Slow!!! warning will go away), click on [Analyze Receiver Settings]. All measured
parameters should fall within range of allowed values shown in brackets [...] .

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How can I monitor Encoder operation?
1. Click on [Operate] to view RPM and Position Counter value.
2. Run encoder and verify proper operation.
2. Click on [Diagnostics] to view internal signal status.

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How To Use ZAPPY Software
How do I change operating parameters stored in the MR320?
1. First, click on the [Upload to PC] button view current settings.
2. Change settings as required. Consult MR320 Technical Manual for detailed information.
3. Click on [Save To MR320] to store all changes in the MR320’s nonvolatile memory.
4. Operate the encoder and verify that the changes are functioning as expected.
Explanation of MR320 System Parameters
NOTE: System parameters are set by the factory and should not be altered by the user. The only exception is the RS422
address and the encoder resolution.
Parameter
Description
Comments
Device Name
MR320
Fixed. This is the model name.
Firmware Version
Version number of firmware
Fixed
Serial Number
Serial number of unit
Fixed
Address
RS422 bus address
This address may be changed by user when more than one
unit resides on the same bus. Common address is 0. Unit
always listens and responds to calls on address 0.
Resolution
This number must match the
number of slits of the encoder
For example, MR324 encoder has resolution of 1024ppr
(pulses-or slits-per revolution). Therefore, the number
entered here should be 1024.
Cal Interval
Defines internal time span for
automatic calibration check.
Cal Interval value represents multiples of ~3 seconds. A
typical value is 82 (~4 minutes). If the value is 0, no
automatic calibration will be performed.
Duty Cycle Adjust
This value is for adjustment of the
quadrature signal duty cycle.
Typically it should be left between 50 to 70. An oscilloscope
is required to adjust the setting.

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Explanation of MR320 Operating Parameters
NOTE: Operating parameters are used to define internal modes of operation and their variables.
Parameter
Description
Comments
Divider
Divides quadrature outputs with
separate output via DIVIDE A+B line
driver outputs
Accepts values 2-8192.
Voltage Mode
Defines output mode (Speed or
Position) and function of Voltage
analog output
If Voltage output not to be used, then set Voltage Scale=0.
Otherwise see following sections describing detailed Speed
or Position setup of analog outputs for detailed information.
Voltage Scale
Determines Full Scale value if used
for Speed or Position
If Voltage output not used, then set Voltage Scale=0.
Otherwise see following sections describing Speed or
Position setup of analog outputs for detailed information.
Voltage Filter
Determines time constant of low
pass filter
If no filter function required, then set Voltage Filter=0.
Otherwise see following sections describing Speed or
Position setup for analog outputs for detailed information.
Current Mode
Defines output mode (Speed or
Position) and function of Current
analog output
If Current output not to be used, then set Voltage Scale=0.
Otherwise see following sections describing Speed or
Position setup of analog outputs for detailed information.
Current Scale
Determines Full Scale value if used
for Speed or Position
If no filter function required, then set Voltage Filter=0.
Otherwise see following sections describing Speed or
Position setup for analog outputs for detailed information.
Current Filter
Determines time constant of low
pass filter
If no filter function required, then set Current Filter=0.
Otherwise see following sections describing Speed or
Position setup for analog outputs for detailed information.
Position Reset
Mode
Programs response of RESET input
which resets Internal Position
Counter to value either 0 or value
of Hardware Reset Point
If value=0, Internal Position Counter resets on rising edge of
hardware RESET input. If value=1, enables a debounce
period for use of an external pushbutton wired to RESET
input. For detailed information, see following section
describing Position setup for analog outputs.
Quadrature
Multiplier
Can increase resolution by clocking
Internal Counter on the ½
quadrature cycle
Set value=0 for standard count mode and value=1 to double
resolution. For detailed information, see following section
describing Position setup for analog outputs.
Direction
Determines direction of encoder
Direction=0 for normal CW direction. Otherwise, Direction =1
to set reverse direction (CCW).
Hardware Reset
Point
Internal Position Counter resets to
this value when hardware RESET
input is activated
For detailed information, see following section describing
Position setup for analog outputs.
Reset On Count
Internal Position Counter is
automatically reset to 0 whenever
absolute value matches this value
Value=0 deactivates this mode. For detailed information, see
following section describing Position setup for analog
outputs.
How do I setup the parameters for operating the Analog Outputs?
The two analog outputs can be independently configured as a Speed (RPM) or an absolute Position indicator. Any Full
Scale value >0 will activate the output. The Mode defines which Function the output performs. Each analog output is
followed by a programmable low pass Filter. Consult following summary or MR3XX User Guide for details.

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How Do I Program The Voltage and/or Current Analog Output for Speed (RPM)?
Encoder Direction (Register 2B) accepts values of 0=CW (default) and 1=CCW
Output Function (Voltage register 23 and Current register 26, see table below for output descriptions)
Full Scale value (Voltage register 24 and Current register 27)
o0 turns the Voltage analog output OFF –regardless of selected Output mode
oAccept full scale value of 10-10,000 (RPM)
Filter values (Voltage register 25 and Current register 28)
oValue 0 corresponds to no filtering
o1-256 correspond to the 3dB filter point per equation provided in the Technical Reference
Voltage SPEED Mode (Register 23)
0
1
Current SPEED Mode (Register 26)
0
1
2

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How Do I Program The Voltage and/or Current Analog Output for POSITION?
Encoder Direction (Register 2B) accepts values of 0=CW (default) and 1=CCW
Output Function ( Voltage register 23 and Current register 26, see table below for output functions)
Full Scale value (Voltage register 24 and Current register 27)
o0 turns the Current Voltage analog output OFF –regardless of selected Mode
oAccepts full scale value of 1-8,388,607 counts
Filter values (Voltage register 25 and Current register 26)
o0 corresponds to no filtering
o1-256 correspond to the 3dB filter point per equation provided in the Technical Reference
oDefault value is 32 (corresponding to 10Hz)
Counter Reset mode (Register 29)
o0 = Counter is reset on first rising edge of RESET input
o1 = Allows debounce period of 60ms
Counter Multiplier mode (Register 2A)
o0 = Normal counting (every cycle is one count)
o1 = Allows ½ quadrature cycle to increment/decrement internal Counter –effectively doubling the
position resolution.
Hardware Reset Value (Register 2C)
oInternal Counter resets to this value when RESET input is activated
oAccepts input value of 0-8,388,607
oSometimes this function is also called “homing”
oAnalog output value will be determined by Mode selected. Here is an example:

Reset On Count/Homing mode (Register 2D)
oInternal Position Counter is automatically reset to 0 whenever its absolute value matches this
preprogrammed value
o0 = mode deactivated
oAccepts input value of 1-8,388,607 for active mode
oHere is an example:

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Voltage POSITION Mode (Register 23)
2
Current POSITION Mode (Register 26)
3
4
5
6