Endress+Hauser Micropilot FMR20 Technical specifications

Products Solutions Services
Brief Operating Instructions
Micropilot FMR20
Modbus RS485
Free space radar
These Instructions are Brief Operating Instructions; they are
not a substitute for the Operating Instructions pertaining to
the device.
For detailed information, refer to the Operating Instructions
and other documentation.
Available for all device versions via:
• Internet: www.endress.com/deviceviewer
• Smart phone/Tablet: Endress+Hauser Operations App
KA01417F/00/EN/03.20
71473147
2020-03-30

Micropilot FMR20 Modbus RS485
2 Endress+Hauser
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer Endress+Hauser
Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
1.
3.
2.
A0023555

Micropilot FMR20 Modbus RS485 Table of contents
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Table of contents
1 About this document .............................................................. 4
1.1 Symbols used ......................................................................... 4
1.2 Documentation ........................................................................ 5
1.3 Supplementary documentation ............................................................ 5
1.4 Registered trademarks .................................................................. 5
2 Basic safety instructions .......................................................... 5
2.1 Requirements for personnel .............................................................. 5
2.2 Designated use ........................................................................ 6
2.3 Workplace safety ...................................................................... 6
2.4 Operational safety ......................................................................7
2.5 Product safety ......................................................................... 7
3 Product description ............................................................... 8
3.1 Product design ........................................................................ 8
4 Incoming acceptance and product identification ................................... 8
4.1 Goods acceptance ...................................................................... 8
4.2 Product identification ................................................................... 9
4.3 Manufacturer address ................................................................... 9
4.4 Nameplate .......................................................................... 10
5 Installation ...................................................................... 12
5.1 Installation conditions .................................................................. 12
5.2 Post-installation check ................................................................. 21
6 Electrical connection ............................................................ 22
6.1 Cable assignment ..................................................................... 22
6.2 Supply voltage ....................................................................... 22
6.3 Connecting the device .................................................................. 23
6.4 Post-connection check ..................................................................25
7 Operability ...................................................................... 25
7.1 Operating concept ..................................................................... 25
7.2 Operation via Bluetooth® wireless technology ................................................ 25
7.3 Remote operation via Modbus protocol ..................................................... 26
8 System integration via Modbus protocol ......................................... 26
8.1 Modbus RS485 information ............................................................. 26
8.2 Measured variables via Modbus protocol .................................................... 28
9 Commissioning and operation ................................................... 28
9.1 Commissioning via SmartBlue (App) ....................................................... 28
9.2 Configuring level measurement via operating software .......................................... 31
9.3 Flow measurement configuration ......................................................... 32
9.4 Measuring mode ...................................................................... 33
10 Diagnostics and troubleshooting ................................................. 33
10.1 General errors ........................................................................ 33
10.2 Error - SmartBlue operation ............................................................. 34
10.3 Diagnostic event in the operating tool ...................................................... 35

About this document Micropilot FMR20 Modbus RS485
4 Endress+Hauser
1 About this document
1.1 Symbols used
1.1.1 Safety symbols
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
1.1.2 Symbols for certain types of information and graphics
Permitted
Procedures, processes or actions that are permitted
Forbidden
Procedures, processes or actions that are forbidden
Tip
Indicates additional information
Reference to graphic
Notice or individual step to be observed
1.
,
2.
,
3.
Series of steps
Result of a step
1, 2, 3, ...
Item numbers
A, B, C, ...
Views

Micropilot FMR20 Modbus RS485 Basic safety instructions
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1.2 Documentation
The following documentation types are available in the Downloads section of the Endress
+Hauser website (www.endress.com/downloads):
For an overview of the scope of the associated Technical Documentation, refer to the
following:
•W@M Device Viewer (www.endress.com/deviceviewer): Enter the serial number from
nameplate
•Endress+Hauser Operations App: Enter the serial number from the nameplate or scan
the 2D matrix code (QR code) on the nameplate
1.3 Supplementary documentation
BA01931F
Operating Instructions FMR20 Modbus
1.4 Registered trademarks
Modbus®
Registered trademark of SCHNEIDER AUTOMATION, INC.
Apple®
Apple, the Apple logo, iPhone, and iPod touch are trademarks of Apple Inc., registered in the
U.S. and other countries. App Store is a service mark of Apple Inc.
Android®
Android, Google Play and the Google Play logo are trademarks of Google Inc.
Bluetooth®
The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG,
Inc. and any use of such marks by Endress+Hauser is under license. Other trademarks and
trade names are those of their respective owners.
2 Basic safety instructions
2.1 Requirements for personnel
The personnel for installation, commissioning, diagnostics and maintenance must fulfill the
following requirements:
‣Trained, qualified specialists must have a relevant qualification for this specific function
and task.
‣Personnel must be authorized by the plant owner/operator.
‣Be familiar with federal/national regulations.
‣Before starting work: personnel must read and understand the instructions in the manual
and supplementary documentation as well as the certificates (depending on the
application).
‣Personnel must follow instructions and comply with general policies.

Basic safety instructions Micropilot FMR20 Modbus RS485
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The operating personnel must fulfill the following requirements:
‣Personnel are instructed and authorized according to the requirements of the task by the
facility's owner-operator.
‣Personnel follow the instructions in this manual.
2.2 Designated use
Application and media
The measuring device described in these Operating Instructions is intended for continuous,
non-contact level measurement in liquids. Because of its operating frequency of approx.
26 GHz, a maximum radiated pulsed power of 5.7 mW and an average power output of
0.015 mW, use outside of closed, metallic vessels is also permitted. If operated outside of
closed vessels, the device must be mounted in accordance with the instructions in the
"Installation" section. Operation of the devices does not pose a risk to health or the
environment.
If the limit values specified in the "Technical data" and the conditions listed in the instructions
and additional documentation are observed, the measuring device may be used for the
following measurements only:
‣Measured process variables: distance
‣Calculated process variables: volume or mass in vessels of any shape; flow through
measuring weirs or channels (calculated from the level by the linearization functionality)
To ensure that the measuring device remains in proper condition for the operation time:
‣Use the measuring device only for media to which the process-wetted materials have an
adequate level of resistance.
‣Observe the limit values (see "Technical data").
Incorrect use
The manufacturer is not liable for damage caused by improper or non-designated use.
Verification for borderline cases:
‣With regard to special media and media used for cleaning, please contact the
manufacturer. Endress+Hauser will be happy to assist in clarifying the corrosion-resistant
properties of wetted materials but does not accept any warranty or liability.
Residual risks
Due to heat transfer from the process as well as power dissipation within the electronics, the
temperature of the electronics housing and the assemblies contained therein may rise to
80 °C (176 °F) during operation. When in operation, the sensor can reach a temperature close
to the medium temperature.
Danger of burns from contact with surfaces!
‣In the event of elevated fluid temperatures, ensure protection against contact to prevent
burns.
2.3 Workplace safety
For work on and with the device:
‣Wear the required personal protective equipment according to federal/national
regulations.

Micropilot FMR20 Modbus RS485 Basic safety instructions
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2.4 Operational safety
Risk of injury!
‣Operate the device only if it is in proper technical condition, free from errors and faults.
‣The operator is responsible for interference-free operation of the device.
Hazardous area
To eliminate the risk of danger to persons or the facility when the device is used in the
approval-related area (e.g. explosion protection, pressure equipment safety):
‣Check the nameplate to verify if the device ordered can be put to its intended use in the
approval-related area.
‣Observe the specifications in the separate supplementary documentation that is an integral
part of this manual.
2.5 Product safety
This measuring device is designed in accordance with good engineering practice to meet state-
of-the-art safety requirements, has been tested, and left the factory in a condition in which it
is safe to operate. It meets general safety standards and legal requirements.
2.5.1 CE mark
The measuring system meets the legal requirements of the applicable EU Directives. These are
listed in the corresponding EU Declaration of Conformity along with the standards applied.
Endress+Hauser confirms successful testing of the device by affixing to it the CE mark.

Product description Micropilot FMR20 Modbus RS485
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3 Product description
3.1 Product design
B
1
8
2
3
4 5
6
7
18
9
9
2
3
4 5
6
7
A
A0028416
 1 Device design
A Device with 40 mm antenna
B Device with 80 mm antenna
1 Sensor housing
2 Seal
3 Process connection rear side
4 Cable gland
5 Pipe adapter
6 O-ring
7 Counter nut
8 Design ring
9 Process connection front side
4 Incoming acceptance and product identification
4.1 Goods acceptance
Check the following during goods acceptance:
• Are the order codes on the delivery note and the product sticker identical?
• Are the goods undamaged?
• Do the nameplate data match the ordering information on the delivery note?
• If required (see nameplate): Are the safety instructions (XA) provided?
If one of these conditions is not met, please contact the manufacturer's sales office.

Micropilot FMR20 Modbus RS485 Incoming acceptance and product identification
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4.2 Product identification
The following options are available for the identification of the measuring device:
• Nameplate specifications
• Extended order code with breakdown of the device features on the delivery note
‣Enter the serial number from the nameplates into W@M Device Viewer
(www.endress.com/deviceviewer)
 All the information about the measuring device and the scope of the associated
Technical Documentation are displayed.
‣Enter the serial number from the nameplate into the Endress+Hauser Operations App or
use the Endress+Hauser Operations App to scan the 2-D matrix code (QR Code) provided on
the nameplate
 All the information about the measuring device and the scope of the associated
Technical Documentation are displayed.
4.3 Manufacturer address
Endress+Hauser SE+Co. KG
Hauptstraße 1
79689 Maulburg, Germany
Address of the manufacturing plant: See nameplate.

Incoming acceptance and product identification Micropilot FMR20 Modbus RS485
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4.4 Nameplate
12
11
8
7
6
2
1
3
4
5
19
20
18
15 16
13
17
14
24
Ext. ord. cd.:
Order code:
Ser. no.:
Tp max:
DeviceID:
Date:
ex works
Mat.:
FW: Dev.Rev.:
10
Ta:
if modification
see sep. label
X =
MWP:
23
21
22
9
A0029096
 2 Nameplate of Micropilot
1 Manufacturer address
2 Device name
3 Order code
4 Serial number (ser. no.)
5 Extended order code (ext. ord. cd.)
6 Supply voltage
7 Signal outputs
8 Process pressure
9 Allowable ambient temperature (Ta)
10 Maximum process temperature
11 Device ID
12 Firmware version (FW)
13 Device revision (Dev.Rev.)
14 CE mark
15 Additional information about the device version (certificates, approvals)
16 C-tick
17 Materials in contact with process
18 Degree of protection: e.g. IP, NEMA
19 Certificate symbol
20 Certificate and approval relevant data
21 Document number of the Safety Instructions: e.g. XA, ZD, ZE

Micropilot FMR20 Modbus RS485 Incoming acceptance and product identification
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22 Modification mark
23 2-D matrix code (QR code)
24 Manufacturing date: year-month
Up to 33 characters of the extended order code are indicated on the nameplate. If the
extended order code contains additional characters, these cannot be displayed.
However, the complete extended order code can also be displayed via the device
operating menu: Extended order code 1 to 3 parameter

Installation Micropilot FMR20 Modbus RS485
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5 Installation
5.1 Installation conditions
5.1.1 Installation types
B C D
A
EF
A0030605
 3 Wall, ceiling or nozzle installation
A Wall or ceiling mount, adjustable
B Mounted at front thread
C Mounted at rear thread
D Ceiling installation with counter nut (included in delivery)
E Horizontal installation in confined spaces (sewer shaft)
F Shaft wall mounting
Caution!
• The sensor cables are not designed as supporting cables. Do not use them for
suspension purposes.
• Always operate the device in a vertical position in free-space applications.
5.1.2 Nozzle installation
The antenna should be located out of the nozzle for optimum measurement. The interior of
the nozzle must be smooth and may not contain any edges or welded joints. The edge of the
nozzle should be rounded if possible.

Micropilot FMR20 Modbus RS485 Installation
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BA
L
D
L
D
L
D
L
D
A0028413
 4 Nozzle installation
A 80 mm (3 in) antenna
B 40 mm (1.5 in) antenna
The maximum length of the nozzle L depends on the nozzle diameter D.
Please note the limits for the diameter and length of the nozzle.
80 mm (3 in) antenna, installation inside nozzle
• D: min. 120 mm (4.72 in)
• L: max. 205 mm (8.07 in) + D × 4.5
80 mm (3 in) antenna, installation outside nozzle
• D: min. 80 mm (3 in)
• L: max. D × 4.5
40 mm (1.5 in) antenna, installation outside nozzle
• D: min. 40 mm (1.5 in)
• L: max. D × 1.5
40 mm (1.5 in) antenna, installation inside nozzle
• D: min. 80 mm (3 in)
• L: max. 140 mm (5.5 in) + D × 1.5

Installation Micropilot FMR20 Modbus RS485
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5.1.3 Position for installation on a vessel
A
BD
D
A0028410
 5 Installation position on a vessel
• If possible install the sensor so that its lower edge projects into the vessel.
• Recommended distance A wall - nozzle outer edge: ~ ¹⁄₆ of the vessel diameter D. Under no
circumstances should the device be mounted closer than 15 cm (5.91 in) to the vessel wall.
• Do not install the sensor in the middle of the vessel.
• Avoid measurements through the filling curtain.
• Avoid equipment such as limit switches, temperature sensors, baffles, heating coils etc.
• No signals are evaluated within the Blocking distance (BD). It can therefore be used to
suppress interference signals (e.g. the effects of condensate) in the vicinity of the antenna.
An automatic Blocking distance of at least 0.1 m (0.33 ft) is configured as standard.
However, this can be overwritten manually (0 m (0 ft) is also permitted).
Automatic calculation:
Blocking distance = Empty calibration - Full calibration - 0.2 m (0.656 ft).
Each time a new entry is made in the Empty calibration parameter or Full calibration
parameter, the Blocking distance parameter is recalculated automatically using this
formula.
If the result of the calculation is a value < 0.1 m (0.33 ft), the Blocking distance of
0.1 m (0.33 ft) will continue to be used.
5.1.4 Device alignment for installation on a vessel
• Align the antenna vertically to the product surface.
• Align the eyelet with lug towards the vessel wall as well as possible.

Micropilot FMR20 Modbus RS485 Installation
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90°
90°
90°
90°
90°
A0028927
 6 Device alignment for installation on a vessel
5.1.5 Beam angle
_
2
α
W = 2 × D × tan
α
D
W
A0033201
 7 Relationship between beam angle α, distance D and beamwidth diameter W
The beam angle is defined as the angle α, at which the power density of the radar waves
reaches half the value of the maximum power density (3 dB width). Microwaves are also
emitted outside the signal beam and can be reflected off interfering installations.
Beam diameter W as a function of beam angle α and distance D.

Installation Micropilot FMR20 Modbus RS485
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40 mm (1.5 in) antenna, α 30 °
W = D × 0.54
40 mm (1.5 in) antenna with flooding protection tube, α 12 °
W = D × 0.21
80 mm (3 in) antenna with or without flooding protection tube, α 12 °
W = D × 0.21
5.1.6 Measurement in plastic vessels
3
1
2
A0029540
 8 Measurement in a plastic vessel with a metallic, interfering installation outside of the vessel
1 Pipe, tubing
2 Ladder
3 Grate, railing
If the outer wall of the vessel is made of a non-conductive material (e.g. GFR), microwaves can
also be reflected by interfering installations outside of the vessel.
Please ensure there are no interfering installations made of a conductive material in the
signal beam (see the beam angle section for information on calculating the beamwidth
diameter).

Micropilot FMR20 Modbus RS485 Installation
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Please contact the manufacturer for further information.
5.1.7 Protective hood
For outdoor use, a protective hood is recommended.
The protective hood can be ordered as an accessory or together with the device via the product
structure "Accessory enclosed".
A0031277
 9 Protective hood, e.g. with 40 mm (1.5") antenna
The sensor is not completely covered by the protective hood.
5.1.8 Using the flooding protection tube
The flooding protection tube ensures the sensor measures the maximum level even if it is
completely flooded.
In free-field installations and/or in applications where there is a risk of flooding, the flooding
protection tube must be used.
The flooding protection tube can be ordered as an accessory or together with the device via
the product structure "Accessory enclosed".

Installation Micropilot FMR20 Modbus RS485
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13
4
1
2
3
4
2
A0031093
 10 Function of flooding protection tube
1 Air pocket
2 O-ring (EPDM) seal
3 Blocking distance
4 Max. level
The tube is screwed directly onto the sensor and seals off the system by means of an O-ring
making it air-tight. In the event of flooding, the air pocket that formed in the tube ensures the
measurement of the maximum level at the end of the tube. Due to the fact that the Blocking
distance is inside the tube, multiple echoes are not analyzed.
Configuration parameters for flooding protection tube
Configuring the blocking distance when using the flooding protection tube
‣Navigate to: Main menu → Setup → Advanced setup → Blocking distance
 Enter 100 mm (4 in).
Perform a mapping after the flooding protection tube has been installed and the
blocking distance has been configured
1. Navigate to: Setup → Confirm distance
 Compare the distance displayed with the actual value in order to start the recording
of an interference echo map.

Micropilot FMR20 Modbus RS485 Installation
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2. Navigate to: Setup → Mapping end point
 This parameter determines the distance up to which the new mapping is to be
recorded.
3. Navigate to: Setup → Present mapping
 Displays the distance up to which a mapping has already been recorded.
5.1.9 Installation with mounting bracket, adjustable
The mounting bracket can be ordered as an accessory or together with the device via the
product structure "Accessory enclosed".
A0030606
 11 Installation with mounting bracket, adjustable
• Wall or ceiling installation is possible.
• Using the mounting bracket, position the antenna so that it is perpendicular to the product
surface.
NOTICE
There is no conductive connection between the mounting bracket and transmitter
housing.
Electrostatic charging possible.
‣Integrate the mounting bracket in the local potential equalization system.
5.1.10 Cantilever installation, with pivot
The cantilever, wall bracket and mounting frame are available as accessories.

Installation Micropilot FMR20 Modbus RS485
20 Endress+Hauser
ABC
A0028412
 12 Cantilever installation, with pivot
A Cantilever with wall bracket
B Cantilever with mounting frame
C Cantilever can be turned (e.g., in order to position the device over the center of the flume)
5.1.11 Installation of horizontal mounting bracket for sewer shafts
The horizontal mounting bracket for sewer shafts is available as an accessory.
A0037747
 13 Installation of horizontal mounting bracket for sewer shafts
5.1.12 Mounting in a shaft
The pivoted mounting bracket is available as an accessory.