Endress+Hauser Micropilot M FMR231 Technical specifications

KA1005F/00/EN/12.09
71030581
Brief Operating Instructions
Micropilot M FMR231
Level-Radar
These are Brief Operating Instructions.
For more detailed information, please refer to the Operating Instructions and the
additional documentation on the CD-ROM provided.
These Brief Operating Instructions are not intended to replace the Operating
Instructions provided in the scope of supply.
The complete device documentation consists of:
• These Brief Operating Instructions
• A CD-ROM with:
– The Operating Instructions
– Approvals and safety certificates
– Additional device-specific information

Table of Contents Micropilot M FMR231 FOUNDATION Fieldbus
2Endress+Hauser
Table of Contents
1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Installation, commissioning and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Operational safety and process safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Safety icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Quick installation guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Incoming acceptance, transport, storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Post-installation check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Wiring in F12/F23 housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Wiring in T12 housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3 Wiring with FOUNDATION Fieldbus plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.4 Terminal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.5 Cable specification FOUNDATION Fieldbus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.6 Connecting the measuring unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.7 Screening/potential matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.8 Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.9 Post-connection check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 General structure of the operating menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Display and operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2 Switching on the measuring device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3 Overview Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.4 Basic Setup with the device display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.5 Envelope curve with the instrument display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Micropilot M FMR231 FOUNDATION Fieldbus Safety instructions
Endress+Hauser 3
1 Safety instructions
1.1 Designated use
The Micropilot M is a compact radar level transmitter for the continuous, contactless
measurement of liquids, pastes and sludge. The device can also be freely mounted outside closed
metal vessels because of its operating frequency of about 6 GHz and a maximum radiated pulsed
energy of 1 mW (average power output 1μW). Operation is completely harmless to humans and
animals.
1.2 Installation, commissioning and operation
• The instrument must only be installed, connected, commissioned and maintained by qualified
and authorized specialists (e.g. electrical technicians) in full compliance with the instructions
in this manual, the applicable norms, legal regulations and certificates (depending on the
application).
• The specialist must have read and understood this manual and must follow the instructions it
contains. If you are unclear on anything in these Brief Operating Instructions, you must read
the Operating Instructions (on the CD-ROM). The Operating Instructions provide detailed
information on the instrument/measuring system.
• The instrument may only be modified or repaired if such work is expressly permitted in the
Operating Instructions (see CD-ROM).
• If faults cannot be rectified, the instrument must be taken out of service and secured against
unintentional commissioning.
• Do not operate damaged instruments. Mark them as defective.
1.3 Operational safety and process safety
• Alternative monitoring measures must be taken to ensure operational safety and process safety
during confiugration, testing and maintenance work on the instrument.
• The instrument is safely built and tested according to state-of-the-art technology and has left
the factory in perfect condition as regards technical safety. The applicable regulations and
European standards have been taken into account.
• Pay particular attention to the technical data on the nameplate.
• If the instrument is to be installed in an explosion hazardous area, then the specifications in
the certificate as well as all national and local regulations must be observed. The instrument
is accompanied by separate "Ex documentation", which is an integral part of this Operating
Instructions. The installation regulations, connection values and Safety Instructions listed in
this Ex document must be observed. The documentation number of the related Safety Instruc-
tions is also indicated.

Safety instructions Micropilot M FMR231 FOUNDATION Fieldbus
4Endress+Hauser
1.3.1 FCC approval
This instrument complies with part 15 of the FCC Rules. Operation is subject to the following
two conditions:
1. This instrument may not cause harmful interference, and
2. this instrument must accept any interference received, including interference that may
cause undesired operation.
"Caution!
Changes or modifications not expressly approved by the part responsible for compliance could
void the user’s authority to operate the equipment.
1.4 Return
Follow the instructions on returning the instrument as outlined in the Operating Instructions on
the CD-ROM provided.
1.5 Safety icons
Safety conventions
#Warning!
A warning highlights actions or procedures which, if not performed correctly, will lead to personal injury,
a safety hazard or destruction of the instrument.
"Caution!
Caution highlights actions or procedures which, if not performed correctly, may lead to personal injury or
incorrect functioning of the instrument.
!Note!
A note highlights actions or procedures which, if not performed correctly, may indirectly affect operation
or may lead to an instrument response which is not planned.

Micropilot M FMR231 FOUNDATION Fieldbus Mounting
Endress+Hauser 5
2 Mounting
2.1 Quick installation guide
L00-FMR231xx-17-00-00-en-011
2.2 Incoming acceptance, transport, storage
2.2.1 Incoming acceptance
Check the packing and contents for any signs of damage. Check the shipment, make sure
nothing is missing and that the scope of supply matches your order.
2.2.2 Transport
"Caution!
Follow the safety instructions and transport conditions for instrument of more than
18 kg (39.69 lbs). Do not lift the measuring instrument by its housing in order to transport it.
2.2.3 Storage
Pack the measuring instrument so that is protected against impacts for storage and transport. The
original packing material provides the optimum protection for this.
The permissible storage temperature is -40 °C to +80 °C (-40 °F to +176 °F) or
-50 °C to +80 °C (-58 °F to +176 °F).
#
90°
90°
90°
90°
90°
Observe orientation when installing!
Installation in tank (free space):
Mark on process connector facing the nearest tank wall!
mark at instrument flange
or threaded boss

Mounting Micropilot M FMR231 FOUNDATION Fieldbus
6Endress+Hauser
2.3 Installation
2.3.1 Mounting kit
In addition to the tool needed for flange mounting, you will require the following tool
• 4 mm (0.16 in) Allen wrench for turning the housing or mounting an FAR10 antenna exten-
sion.
2.3.2 Installation in tank (free space)
Standard installation
• Marker is aligned towards tank wall.
• The marker is always exactly in the middle between two bolt-holes in the flange.
• Use spring washers (1) (see Fig.).
!Note!
It is recommended to retighten the flange bolts periodically, depending on process
temperature and pressure.
Recommended torque: 60 to 100 Nm (44.25 to 73.75 lbf ft).
• After mounting, the housing can be turned 350° in order to simplify access to the display and
the terminal compartment, →ä11.
• The inactive part of the rod antenna must extend below the nozzle.
• The rod antenna must be aligned vertically.
L00-FMR231xx-17-00-00-en-002
Material PPS PTFE
Antenna length [mm (in)] 360 (14.2) 510 (20.1) 390 (15.4) 540 (21.3)
H [mm (in)] < 100 (< 3.94) < 250 (< 9.84) < 100 (< 3.94) < 250 (< 9.84)
H
H
1
beam launched
here
beam launched
here
inactive length
inactive length spring washers

Micropilot M FMR231 FOUNDATION Fieldbus Mounting
Endress+Hauser 7
2.3.3 Orientation
• Recommended distance (1) wall - outer
edge of nozzle: ~1/6 of tank diameter.
Nevertheless the device should not be
installed closer than 30 cm (11.8 in) to the
tankwall.
• Not in the centre (3), interference can
cause signal loss.
• Not above the fill stream (4).
• It is recommended to use a weather pro-
tection cover (2) in order to protect the
transmitter from direct sun or rain.
Assembly and disassembly is simply done
by means of a tension clamp (see Opera-
tion Instruction on the CD-ROM).
L00-FMR2xxxx-17-00-00-xx-006
1
234

Mounting Micropilot M FMR231 FOUNDATION Fieldbus
8Endress+Hauser
2.3.4 Engineering hints
Tank installations
• Avoid any installations (1), like limit
switches, temperature sensors, etc., inside
the signal beam (→ä9).
• Symmetrical installations (2), i.e. vacuum
rings, heating coils, baffles, etc., can also
interfere with the measurement.
Optimization options
• Antenna size: the bigger the antenna, the
smaller the beam angle, the less
interfe-rence echoes.
• Mapping: the measurement can be
optimized by means of electronic
suppression of interference echoes.
• Antenna alignment:
refer to BA229F/00/EN.
• Stilling well: a stilling well can always be
used to avoid interference.
• Metallic screens (3) mounted at a slope
spread the radar signals and can,
therefore, reduce interference echoes.
Please contact Endress+Hauser for further
information.
L00-FMR2xxxx-17-00-00-xx-007
1
3
2
a

Micropilot M FMR231 FOUNDATION Fieldbus Mounting
Endress+Hauser 9
2.3.5 Beam angle
The beam angle is defined as the angle α where the energy density of the radar waves reaches
half the value of the maximum energy density (3dB-width). Microwaves are also emitted outside
the signal beam and can be reflected off interfering installations. Beam diameter Was function
of antenna type (beam angle α) and measuring distance D:
2.3.6 Measuring conditions
• In case of boiling surfaces, bubbling or tendency for foaming, use FMR230 or FMR231.
Depending on its consistence, foam can either absorb microwaves or reflect them off the foam
surface. Measurement is possible under certain conditions.
• In case of heavy steam development or condensate the max. measuring range of FMR240
may decrease depending on density, temperature and composition of the steam
È use FMR230 or FMR231.
• For the measurement of absorbing gases such as ammonia NH3or some fluorocarbons1),
please use FMR230 in a stilling well
• The measuring range begins, where the beam hits the tank bottom. Particularly with dish
bottoms or conical outlets the level cannot be detected below this point.
Beam angle α23°
L00-FMR2xxxx-14-00-06-de-027
Measuring
distance (D)
Beam diameter (W)
Rod
3 m (9.8 ft) 1,61 m (5.3 ft)
6m(20ft) 3,22m(11ft)
9m(30ft) 4,82m(16ft)
12 m (39 ft) 6,43 m (21 ft)
15 m (49 ft) 8,04 m (26 ft)
20 m (66 ft) 10,72 m (35 ft)
1) Affected compounds are e.g. R134a, R227, Dymel 152a.
a
D
W
a
D
_
=2
2..
tan
W

Mounting Micropilot M FMR231 FOUNDATION Fieldbus
10 Endress+Hauser
• In case of media with a low dielectric constant (groups A and B), the tank bottom can be
visible through the medium at low levels (low height C). Reduced accuracy has to be expected
in this range. If this is not acceptable, we recommend positioning the zero point at a distance
C(see Fig.) above the tank bottom in these applications.
• In principle it is possible to measure up to the tip of the antenna with FMR230/231/240.
However, due to considerations regarding corrosion and build-up, the end of the measuring
range should not be chosen any closer than A(see Fig.) to the tip of the antenna.
For FMR244/245, the end of measuring range should not be chosen closer than A(see Fig.)
to the tip of the antenna, especially if there is development of condensate.
• The smallest possible measuring range Bdepends on the antenna version (see Fig.).
• The tank diameter should be greater than D(see Fig.), the tank height at least H(see Fig.).
L00-FMR2xxxx-17-00-00-en-017
A [mm (in)] B [m (ft)] C [mm (in)] D [m (ft)] H [m (ft)]
50 (1.97) > 0,5 (> 0.02) 150 to 300
(5.91 to 11.8) > 1 (> 3.3) > 1,5 (> 4.9)
100%
0%
B
A
C
H
ØD

Micropilot M FMR231 FOUNDATION Fieldbus Mounting
Endress+Hauser 11
2.3.7 Turn housing
After mounting, the housing can be turned 350° in order to simplify access to the display and
the terminal compartment. Proceed as follows to turn the housing to the required position:
• Undo the fixing screws (1)
• Turn the housing (2) in the required direction
• Tighten up the fixing screws (1)
L00-FMR2xxxx-17-00-00-en-010
2.4 Post-installation check
After the measuring instrument has been installed, perform the following checks:
• Is the measuring instrument damaged (visual check)?
• Does the measuring instrument correspond to the measuring point specifications such as pro-
cess temperature/pressure, ambient temperature, measuring range, etc.?
• Is the flange marking correctly aligned (→ä5)?
• Have the flange screws been tightened up with the respective tightening torque?
• Are the measuring point number and labeling correct (visual check)?
• Is the measuring instrument adequately protected against rain and direct sunlight (see Chapter
"Accessories" in the Operating Instruction on the CD-ROM)?
1
1
22
F12 / F23 housing T12 housing
allen key
4 mm (0.16 in)

Wiring Micropilot M FMR231 FOUNDATION Fieldbus
12 Endress+Hauser
3 Wiring
#Warning!
When using the measuring instrument in hazardous areas, installation must comply with the
corresponding national standards and regulations and the Safety Instructions or Installation or
Control Drawings.
"Caution!
Before connection please note the following:
• The power supply must be identical to the data on the nameplate.
• Switch off power supply before connecting up the instrument.
•
Use screened, twisted wire pair (refer to Operating Instruction on the CD-ROM).
3.1 Wiring in F12/F23 housing
1. Unscrew housing cover (1).
2. Remove any display (2) if fitted.
3. Remove cover plate from terminal
compartment (3).
4. Pull out terminal module (4) slightly
using "pulling loop".
5. Insert cable (5) through gland (6).
6. Make connection (see terminal
assignment).
7. Re-insert terminal module (4).
8. Tighten cable gland (6).
9. Tighten screws on cover plate (3).
10. Insert display (2) if fitted.
11. Screw on housing cover (1).
12. Switch on power supply.
L00-FMR2xxxx-04-00-00-xx-001
ENDRESS+HAUSER
ENDRESS+HAUSER
5
3
4
6
1
2
12 34

Micropilot M FMR231 FOUNDATION Fieldbus Wiring
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3.2 Wiring in T12 housing
3.3 Wiring with FOUNDATION Fieldbus plug
1. Unscrew housing cover (1).
2. Insert cable (2) through gland (3).
Use screened, twisted wire pair.
3. Connect cable screen to the grounding
terminal (4) within the terminal
compartment.
4. Make connection (see terminal
assignment).
5. Tighten cable gland (3).
6. Screw on housing cover (1).
7. Switch on power supply.
L00-FMR53xxxx-04-00-00-xx-002
1
3
4
2
12 34
1. Insert plug (1) into bushing (2).
2. Screw firmly.
3. Ground the device according to the
desired safety concept.
L00-FMP4xxxx-04-00-00-xx-004
1
2

Wiring Micropilot M FMR231 FOUNDATION Fieldbus
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3.4 Terminal assignment
L00-FMxxxxxx-04-00-00-de-013
3.5 Cable specification FOUNDATION Fieldbus
Twisted, shielded pairs must be used. The cable specifications can be taken from the FF
specification or IEC61158-2. The following have been found suitable:
• Siemens 6XV1 830-5BH10 (grey)
• Kerpen CEL-PE/OSCR/PVC/FRLA FB-02YS(ST)YFL (grey)
• Belden 3076F (orange)
3.6 Connecting the measuring unit
Cable entry
• Cable gland: M20x1.5 (recommended cable diameter 6 to 10 mm (0.24 to 0.39 in)).
• Cable entry: G½ or ½NPT
• 7/8" FOUNDATION Fieldbus plug
Terminals
Cable cross-section: 0,5 to 2,5 mm² (20 to 14 AWG).
34 12
+–
plant
ground

Micropilot M FMR231 FOUNDATION Fieldbus Wiring
Endress+Hauser 15
Supply voltage
The following values are the voltages across the terminals directly at the instrument:
Current consumption
• Device basic current: 15 mA
• Device In-rusch current: ≤ 15 mA
• Error current FDE (Fault Disconnection Electronic): 0 mA
Overvoltage protector
The level transmitter Micropilot M with T12-housing (housing version "D", see ordering
information in the Operating Instruction) is equipped with an internal overvoltage protector (600
V surge arrester) according to DIN EN 60079-14 or IEC 60060-1 (impulse current test 8/20 μs
,
Î = 10 kA, 10 pulses). Connect the metallic housing of the Micropilot M to the tank wall or
screen directly with an electrically conductive lead to ensure reliable potential matching.
Supply voltage 9 V...32 V (non Ex)
max. voltage: 35 V
Device (Lift off) minimum voltage 9 V
Polarity sensitive No
FISCO / FNICO compliant Yes

Wiring Micropilot M FMR231 FOUNDATION Fieldbus
16 Endress+Hauser
3.7 Screening/potential matching
• You achieve optimum screening against disturbances if the screening is connected on both
sides (in the cabinet and on the device). If you have to reckon with potential equalisation cur-
rents in the plant, only earth screening on one side, preferably at the transmitter.
• When using in hazardous areas, you must observe the applicable regulations and the separate
Ex documentation.
3.8 Degree of protection
• with closed housing: IP65, NEMA4X (higher degree of protection e.g. IP68 on request)
• with open housing: IP20, NEMA1 (also ingress protection of the display)
• antenna: IP68 (NEMA6P)
3.9 Post-connection check
After wiring the measuring instrument, perform the following checks:
• Is the terminal allocation correct (→ä14)?
• Is the cable gland tight?
• Is the FOUNDATION Fieldbus plug screwed tight?
• Is the housing cover screwed tight?
• If auxiliary power is available:
Is the instrument ready for operation and does the liquid crystal display show any value?

Micropilot M FMR231 FOUNDATION Fieldbus Operation
Endress+Hauser 17
4 Operation
4.1 General structure of the operating menu
The operating menu is made up of two levels:
•Function groups (00, 01, 03, …, 0C, 0D):
The individual operating options of the instrument are split up roughly into different function
groups. The function groups that are available include, e.g.: "basic setup", "safety
settings.", "output", "display", etc.
•Functions (001, 002, 003, …, 0D8, 0D9):
Each function group consists of one or more functions. The functions perform the actual
operation or parameterisation of the instrument. Numerical values can be entered here and
parameters can be selected and saved. The available functions of the "basic setup" (00)
function group include, e.g.: "tank shape" (002), "medium property" (003), "process
cond." (004), "empty calibr." (005), etc.
If, for example, the application of the instrument is to be changed, carry out the following pro-
cedure:
1. Select the "basic setup" (00) function.
2. Select the "tank shape" (002) function (where the existing tank shape is selected).
4.1.1 Identifying the functions
For simple orientation within the function menus, for each function a position is shown on the
display.
L00-FMRxxxxx-07-00-00-en-005
The first two digits identify the function group:
•basic setup 00
•safety settings 01
•linearisation 04
...

Operation Micropilot M FMR231 FOUNDATION Fieldbus
18 Endress+Hauser
The third digit numbers the individual functions within the function group:
Here after the position is always given in brackets (e.g. "tank shape" (002)) after the described
function.
4.2 Display and operating elements
Four lines with 20 characters each. Display contrast adjustable through key combination.
L00-FMxxxxxx-07-00-00-en-001
The LCD display can be removed to ease operation by simply pressing the snap-fit (see graphic
above). It is connected to the device by means of a 500 mm (19.7 in) cable.
•basic setup 00 →•tank shape 002
•medium property 003
•process cond 004
...
ENDRESS + HAUSER
E
+
–
ENDRESS+HAUSER
MICROPILOTII
ENDRESS+HAUSER
MICROPILOTII
IP65
OrderCode:
Ser.-No.:
OrderCode:
Ser.-No.:
Messbereich
Measuringrange
Messbereich
Measuringrange
U16...36VDC
4...20mA
U16...36VDC
4...20mA
max.20m
max.20m
MadeinGermany Maulburg
MadeinGermany Maulburg
T>
70°C:
At>85°C
T>7
0°C:
At>85°C
LCD
(liquid crystal display)
Symbols
3 keys
snap-fit

Micropilot M FMR231 FOUNDATION Fieldbus Operation
Endress+Hauser 19
4.2.1 Display
L00-FMRxxxxx-07-00-00-en-003
4.2.2 Display symbols
The following table describes the symbols that appear on the liquid crystal display:
+21dB 09C
10.002.305m
0.00
ENDRESS + HAUSER
E
+
–
Headline Position indicator
Main value
Unit
Symbol
Selection list
Help text
Envelope
curve
Bargraph
Symbol Meaning
ALARM_SYMBOL
This alarm symbol appears when the instrument is in an alarm state. If the symbol flashes, this indicates a
warning.
LOCK_SYMBOL
This lock symbol appears when the instrument is locked, i.e. if no input is possible.
COM_SYMBOL
This communication symbol appears when a data transmission via e.g. HART, PROFIBUS PA or
FOUNDATION Fieldbus is in progress.
SIMULATION_SWITCH_ENABLE
This communication symbol appears when simulation in FOUNDATION Fieldbus is enabled via the DIP
switch.

Operation Micropilot M FMR231 FOUNDATION Fieldbus
20 Endress+Hauser
4.2.3 Key assignment
Key(s) Meaning
Oor VNavigate upwards in the selection list.
Edit numeric value within a function.
Sor WNavigate downwards in the selection list.
Edit numeric value within a function.
Xor ZNavigate to the left within a function group.
FNavigate to the right within a function group, confirmation.
Oand F
or
Sand FContrast settings of the LCD.
Oand Sand F
Hardware lock / unlock
After a hardware lock, an operation of the instrument via display orcommunication is
not possible!
The hardware can only be unlocked via the display. An unlock parameter must be
entered to do so.