Mitsubishi Electric EMU4-FD1-MB User manual

Energy Measuring Unit
MODEL
EMU4-FD1-MB
User’s Manual (Details)
●Before operating the instrument, you should first read thoroughly this operation manual for
safe operation and optimized performance of the product.
Deliver this user’s manual to the end user.

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Safety precautions
Thank you for purchasing the Energy Measuring Unit.
･
This manual describes setup and usage for the Energy Measuring Unit. Before using the product, please read this manual
carefully to ensure correct use. Especially, in the case of where this unit is to be installed, please read “1. Precautions for Use” to
ensure correct use.
･Make sure that the end users read this manual and then keep the manual in a safe place for future reference.
･Make sure to deliver this manual to the end-user.
･If you are considering using this unit for special purpose such as nuclear power plants, aerospace, medical care or passenger
vehicles please refer to our sales representative.(For details, please see at the end of this manual.)
･
Notations in this manual
Use the following marks in this manual.
Mark
Meaning of the icons
Danger
Indicates that incorrect handling may result in death or severe injury, ignoring this marking.
Caution
Indicates that incorrect handling may result in injury or property damage, ignoring this marking.
Supplement
Indicates that precautions to avoid a malfunction and to work the unit properly.
Indicates that the pages described that related matters.
Features
･This Energy Measuring unit can measure various types of electric quantity such as voltage, current, electric power and electric
energy.
･The measured data can be sent to the high-end device, such as a monitoring device by MODBUS®RTU communication
function.
･This Energy Measuring unit has one external input terminal, which can switch between pulse input and contact input.
Production quantity and water, gas, air (other than electricity) can be measured in the pulse input setting.
Monitoring of condition and alarm, measurement of operating time and electric energy during operation can be done in the
contact input setting.
MODBUS®is a registered trademark of SCHNEIDER ELECTRIC USA, INC in the United States.
・
This unit cannot be used for deal and proof of electric energy measurement stipulated in the
measurement law. Please use the certified watt-hour meter to be used for deal and proof of
electric energy measurement stipulated.
・
When using this unit, make sure to use it in combination with 5A/1A current transformer.

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Table of Content
Safety precautions ................................................................................................................................................................. 1
Features ................................................................................................................................................................................... 1
Table of Content...................................................................................................................................................................... 2
1. Precautions for Use ........................................................................................................................................................... 3
Precautions for Operating Environment and Conditions .....................................................................................................................3
Matters concerning the precaution before use......................................................................................................................................3
Installation and Wiring Precautions ........................................................................................................................................................3
Precautions for Use..................................................................................................................................................................................4
Maintenance Precautions........................................................................................................................................................................4
Storage Precautions.................................................................................................................................................................................4
Disposal Precautions ...............................................................................................................................................................................4
About packaging materials and this manual .........................................................................................................................................4
2. Disclaimer ............................................................................................................................................................................ 5
3. Name and function of each part....................................................................................................................................... 5
4. Attaching and removing the unit ..................................................................................................................................... 7
5. Procedure for wiring ........................................................................................................................................................ 10
Wiring for EMU4-FD1-MB .....................................................................................................................................................................10
System configuration example of MODBUS®RTU communication.................................................................................................13
6. Operating mode................................................................................................................................................................ 15
7. Setting method .................................................................................................................................................................16
Procedures for setting ............................................................................................................................................................................16
Setting menu 1: Phase wire system, primary voltage, primary current, demand time, etc............................................................18
Setting menu 2: MODBUS®RTU communication .............................................................................................................................22
Setting menu 3: Contact / pulse input/output, equivalent CO2, harmonic, operating time, etc. .....................................................25
Setting menu 4: Upper / lower limit alarm setting, alarm delay time ,alarm reset, etc. ...................................................................26
Setting menu 5: Setting related to logging unit....................................................................................................................................28
Setting menu 5: MODBUS®TCP communication .............................................................................................................................29
Confirmation menu 1 - 5: Confirmation of setting values in setting menu 1 - 5...............................................................................30
Initialization of related items by change of setting...............................................................................................................................31
Clock setting and logging data clear.....................................................................................................................................................32
Change of date format ...........................................................................................................................................................................33
How to use test mode ............................................................................................................................................................................34
Test menu 1: Discrimination support function for improper connection ...........................................................................................35
Test menu 2: Communication test........................................................................................................................................................47
Test menu 3: Pulse output test..............................................................................................................................................................48
Test menu 4: Alarm output test..............................................................................................................................................................48
8. Operation ........................................................................................................................................................................... 49
Operation procedure in operating mode..............................................................................................................................................49
Measured item indication in operating mode ......................................................................................................................................52
How to use upper/lower limit alarm function........................................................................................................................................54
Operations of alarm reset ......................................................................................................................................................................55
Preset and all data reset ........................................................................................................................................................................56
9. Device operation............................................................................................................................................................... 57
Measured items ......................................................................................................................................................................................57
Restrictions of measured data ..............................................................................................................................................................59
10. Reference......................................................................................................................................................................... 60
In case you think the unit is in failure ....................................................................................................................................................60
About error number ................................................................................................................................................................................60
After-sales service ..................................................................................................................................................................................61
Q&A..........................................................................................................................................................................................................61
11. Requirement for the compliance with EMC Directives ............................................................................................ 63
12. Specifications .................................................................................................................................................................64
Common specifications .........................................................................................................................................................................64
Specifications of MODBUS®RTU communication .............................................................................................................................66
13. Option devices................................................................................................................................................................ 67
14. External dimensions...................................................................................................................................................... 70
15. Index ................................................................................................................................................................................. 71

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1. Precautions for Use
Precautions for Operating Environment and Conditions
･This unit is premised on being used in pollution degree 2* environment. When used in higher pollution degree, protect this unit
from pollution on another device side to be incorporated.
･Over voltage category of measuring circuit in this unit is CAT Ⅲ*, and that of auxiliary power circuit (MA, MB) is CAT Ⅲ*.
･Do not use this product in the places listed below. Failure to follow the instruction may cause malfunctions and a life decrease
of product.
- Places the Ambient temperature exceeds the range -5 - +55°C.
- Places the average daily temperature exceeds +35°C.
- Places the Relative humidity exceeds the range 30-85% or places with dewfall.
- Vibration and impact exceed the specifications.
- Dust, corrosive gas, saline and oil smoke exist.
- Places exposed to direct sunlight.
- Places exposed to rain or water drop.
- Places in strong electromagnetic field or places large amounts of external noise exist.
- Places metal fragments or conductive substance are flying.
- Altitude exceeds 2000m.
< For prevention of electric shock>
･This unit is designed to be housed within another device for prevention of electric shock. House this unit within the device
such as the grounded control panel before use.
･To prevent persons with little knowledge about electric equipment from electric shock, panel must be taken either following
measure.
- Lock the panel so that only those who get an education about electric equipment and have sufficient knowledge can
unlock, or shut off power supply automatically by opening the panel.
- Cover the dangerous part of this unit. (Required protection code is higher than IP2X.)
*: For the definition of the pollution degree and the over voltage category, refer to EN61010-1/2010.
Matters concerning the precaution before use
・Use the unit in the specified usage environment and conditions.
・The setting of this unit (phase system, primary voltage, primary current) is necessary before use it.
Installation and Wiring Precautions
Make sure to read this manual carefully before Installation and Wiring.
Caution
<Precautions for Electric work>
･Any person who is involved in the installation and the wiring of this unit should be fully competent to do this work.
･Work under the electric outage condition when installing and wiring. Failure to do so may cause electric shock, a failure of
the unit, a fire etc.
･When tapping or wiring, take care not to entering any foreign objects such as chips and wire pieces into this unit.
･Check the connection diagram when wiring. Wrong wiring may cause failure of the unit, a fire or electric shock.
･For protection against noise, transmission lines and input/output lines shall not be placed close to or bound
together with the power lines and high-voltage lines.
･The wires to be connected to this unit shall be placed in a duct or fixed together by cramping. If the electric wires are not
placed in the duct or cramped together, loosen wires or their movement or careless stretch may cause a breakage of the
unit or wire or a malfunction due to poor contact of electric wires.
･If transmission lines and input/output lines are placed close to or bound together with the power lines and high-voltage
lines, keep distance as below between them.
Condition
Distance
Power line 600V or less
Other power line
300mm or longer
600mm or longer
<Connection of terminal block>
･Strip the wires with proper length. Overlong stripping length may cause short to next wire. Shorter stripping length may
cause contact failure.
･Take care not to short to next terminal by a filament. (Do not plate the wires with solder.)
･Do not connect three or more wires to one terminal of a terminal block for preventing loose contact and wires dropout.
･Use appropriate size of electric wires. If inappropriate size of electric wire is used, it may cause a fire due to generated
heat.
･Circuits connected to an auxiliary power circuit (MA, MB) need to be used the over current protection device (fuse, circuit
breaker, etc.) to prevent shorting connecting wires. (Select an appropriate rating to prevent burnout of the wires.)
･Tighten the screw within the specified torque. Over tightening can damage the screw and/or terminal.
･After tightening the screws, be sure to check all the screws tightened. Loose screw may cause malfunction of the unit, a
fire or electric shock.
･Be sure to attach the terminal cover to prevent electric shock.
･Do not directly touch any conductive part of the unit. Doing so can cause electric shock, failure or malfunction of the unit.
･
If the wires connected to this unit are strongly pulled off, it may cause a malfunction or a breakage to the unit or the wire.

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<Connection of frame GND terminal>
･Do not exceed the specified voltage when doing an insulation resistance test and a commercial frequency withstand
voltage test. Do not connect to frame GND terminal during the insulation resistance test and pressure test.
･Use the crimp-type terminal appropriated for the size of electric wires. If inappropriate crimp-type terminal is used, a wire
breakage or a contact failure may occur, which may cause a device malfunction, a failure, a burnout or a fire.
･Frame GND terminal must be grounded according to the D-type ground (ground resistance is not exceed 100Ω).
Precautions for Use
･This unit cannot be used for deal and proof of electric energy measurement stipulated in the measurement law.
･Before operating the product, check that active bare wire and so on does not exist around the product. If any bare wire exists,
stop the operation immediately, and take an appropriate action such as isolation protection.
･In the event of a power outage during the setting, the unit is not set correctly. Please set again after power recovery.
Danger
･
Do not touch the live part. It may cause electric shock, electric burn injury or damage of the device.
･
Work under the electric outage condition when installing and wiring.
Caution
･
Do not disassemble or modify this unit. It may cause failure, malfunction, injury or fire.
･Use this unit within the ratings specified in this manual. If it is used outside the ratings, it may cause not only malfunction
or failure but also fire burnout.
・When using this product, make sure to use it in combination with 5A current transformer(max 30V AC).
･Do not open the secondary side of the CT circuit. If the CT is not connected properly or if the secondary side of the CT is
open, it may result in high voltage on the secondary side of the CT, the insulation of the secondary winding wire may be
damaged, and burnout may be caused.
Maintenance Precautions
･Use a soft dry cloth to clean off dirt of the unit surface. Do not let a chemical cloth remain on the surface for an extended
period of time nor wipe the surface with thinner or benzene.
･Check for the following items to use this unit properly for long time.
(1) Daily maintenance
(a) No damage on this unit
(b) No abnormality with LCD indicators
(c) No abnormal noise, smell or heat
(2) Periodical maintenance (Once every 6 months to 1 year)
- No looseness with installation and wire connection
Caution
Do periodical maintenance under the electric outage condition. Failure to do so may cause
electric shock, failure of the unit or a fire. Tighten the terminal regularly to prevent a fire.
Storage Precautions
･To store this unit, turn off the power and remove wires, and put it in a plastic bag.
･For long-time storage, avoid the following places. Failure to follow the instruction may cause a failure and reduced life of the unit.
- Places the Ambient temperature exceeds the range -10 - +60°C.
- Places the average daily temperature exceeds +35°C.
- Places the Relative humidity exceeds the range 30-85% or places with dewfall.
- Vibration and impact exceed the specifications.
- Dust, corrosive gas, saline and oil smoke exist.
- Places metal fragments or conductive substance are flying.
- Places exposed to rain, water drop or direct sunlight.
Disposal Precautions
When disposing of this unit, treat it as industrial waste.
About packaging materials and this manual
For reduction of environment load, packaging materials are produced with cardboard, and this manual is printed on recycled
paper.

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2. Disclaimer
‧It is prohibited to reprint or copy all contents of this document in any form without our permission.
‧The contents of this document will be updated to follow revisions to software and hardware, however under unavoidable
circumstances it may not be synchronized.
3. Name and function of each part
･Name of each part
Contact/ pulse input terminals
Contact/ pulse output terminals
Frame GND terminal
Power supply terminals
Voltage input terminals
LCD
display
Operation
button
Communication terminals (MODBUS
®
RTU)
Current input terminals
･Back view
IEC rail fixture
Terminal
symbols
Function
Description
P1/P1, P2/P0,
P3/P3, NC/P2
Input voltage
Connect the voltage input wire of the
measuring circuit.
Frame GND (FG)
Connect to ground. (D-type ground)
MA, MB
Auxiliary power
Connect the auxiliary power supply.
1k, 1L, 2k, 2L,
3k, 3L
Input current
Connect the secondary output of the
current transformer (CT) connected to
the measurement circuit’s current wire.
485+, 485-
MODBUS®
communication
Connect the communication wire
(MODBUS
®
RTU).
SLD
Connect to ground. (D-type ground)
Ter
Connect with “485-“ terminals (the unit
at end of the link) page 13
X1, COM
X
Pulse input/
contact input
Connect pulse input/contact input
wires.
Y1, COM
Y
Pulse output/
contact output
Connect pulse output/contact output
wires.
Sign and function of the terminal block

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･Function of operation buttons
Control buttons have many functions as below. (How to change mode page 15.)
Meaning of symbol: ○(Press), □(Press more than 1 sec), ◎(Press more than 2 sec), ― (Press both at the same time)
Operation
Mode
Name of Button
Function
SET
-/RESET
+/PHASE
DISP
Operating
Mode
○
Change measured items
○
Change phase
○
Change harmonic order (at harmonic display)
◎
Clear alarm (at alarm keeping)
◎
Transition to confirmation mode
◎◎
Transition to setting mode
Contact
display
◎Clear contact latch
Integrated
value
display
◎◎Transition to preset display
◎◎Transition to reset display of all data
Setting mode
/
Confirmation
mode
Menu
display
○
Enter setting menu
○
(□)
○
(□) Moving up or down of menu number
(Move at fast speed when pressing more than 1sec)
Setting mode
/
Setting
display
○
Change of setting items (forward)
Transition to setting menu number (at final setting item)
○
(□)
○
(□)
Moving up or down of setting value
(Move at fast speed when pressing more than 1sec)
○
Change setting items (backward)
Transition to setting menu number (at beginning setting
item)
□
Go back to setting menu
Confirmation
mode /
Setting
display
○
Change setting items (forward)
Transition to setting menu number (at final setting item)
○
Change setting items (backward)
Transition to setting menu number (at beginning setting
item)
□Transition to setting menu
Confirmation
display of
setting
reflection
○
At "END" display, memorize changed setting and transition
to operating mode
At "CANCEL" display, annul changed setting and transition
to operating mode
○○
Moving up or down of setting value
◎◎
Reset setting values to factory default (only effective at
CANCEL display)
･Functions of LCD
No.
Indicator
Description
1
Measured value
Display measured value digitally.
2
Measured item
Display measured item displayed on indicator 1.
3
Communication
Light when connecting communication unit.
4
Energy
Measurement
Light when measuring electric energy
5
Setting
Indicator lights on setting mode.
Indicator lights on confirmation mode.
2
1
3
4
5
DISP button
+/PHASE button
-/RESET button
SET button

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4. Attaching and removing the unit
Caution
Any person who is involved in the installation and the wiring of this unit should be fully competent to do this work.
There are two installation methods, surface mounting and panel mounting
･Surface mounting
(1) How to attach to the IEC rail
Applicable IEC rail Attaching Removing
*1: When showing the display part by cutting the panel face in mounting the IEC rail, cut the panel at where it is more than 50mm away
from the fulcrum of the open/close of the door.
(2) Catch
IEC rail
(4) Push the IEC rail
fixture upward.
(3) Push in
(1) Hold the unit and pull IEC rail
fixture downward.
(2) Pull the unit
(1) Pull IEC rail fixture downward.
More than 7.3

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･Plate mounting
(1) Screw mounting (Measuring unit)
Dimensions of hole panel(76×44.5)
Attaching
(2) Screw mounting (Measuring unit + optional unit)
Dimensions of hole panel
（
101×44.5
）
Attaching
Plate
Attach the plate by using 2 screws.
Tight
ening torque: 0.63N・m
Mounting screws
Outline of the measuring unit
Outline of the option unit
Attach the plate by using 2 screws.
Tight
ening torque: 0.63N・m
Mounting screws
Plate
Recommended
screws
cross recessed head screw with captive washer
and flat washer
M3×10
2pcs
Outline of the measuring unit
*Panel cut dimensions are made larger than the product considering
tolerance in panel cut.
If you want to prevent dust and other intrusion the gap of panel cut,
cut the panel according to the product to be mounted.
*Panel cut dimensions are made larger than the product considering
tolerance in panel cut.
If you want to prevent dust and other intrusion the gap of panel cut,
cut the panel according to the product to be mounted.

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(3) Screw mounting (When using the measuring unit and the attachment for panel mounting)
Dimensions of hole panel
（
76×44.5
）
Attaching
(4) Screw mounting (Measuring unit + optional unit, when using the attachment for panel mounting)
Dimensions of hole panel (101×44.5)
Attaching
Attach the plate by using 2 screws, then install the attachment on the
plate (Use the attachment to cut the three points as below).
Tightening torque: 0.63N
・
m
Cut off
Attachment for
panel mounting
Plate
Attachment for panel
mounting
Attach the plate by using 2 screws, then install the
attachment on the plate.
Tight
ening torque: 0.63N・m
Mounting screws
Screws for panel
mounting
attachment
Plate
Attachment for panel
mounting
Mounting screws
Screws for panel
mounting
attachment
*Please screw up the panel mounting attachment where there are high
levels of vibration.
*The screws (mounting screws and screws for panel mounting
attachment) are supplied with panel mounting attachment.
Outline of the measuring unit
*Please screw up the panel mounting attachment where there are high
levels of vibration.
*The screws (mounting screws and screws for panel mounting
attachment) are supplied with panel mounting attachment.
Outline of the measuring unit
Outline of the option unit
*Panel cut dimensions are made larger than the product considering
tolerance in panel cut.
If you want to prevent dust and other intrusion the gap of panel cut,
cut the panel according to the product to be mounted.
*Panel cut dimensions are made larger than the product considering
tolerance in panel cut.
If you want to prevent dust and other intrusion the gap of panel cut,
cut the panel according to the product to be mounted.

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5. Procedure for wiring
Wiring for EMU4-FD1-MB
Rating voltage for every phase wire system
Phase wire type
Type
Rating voltage
Figure
3-phase 4-wire type
STAR
max AC277V(L-N)/480V(L-L)
Figure 1
3-phase 3-wire type
DELTA
max AC220V(L-L)
Figure 2
STAR
max AC440V(L-L)
Figure 3
1-phase 3-wire type
―
max AC110V(L-N)/220V(L-L)
Figure 4
1-phase 2-wire type
(Note)
DELTA
max AC220V(L-L)
Figure 5
STAR
max AC440V(L-L)
Figure 6
Note. In case of a circuit which is wired from the delta connection of a 3-phase 3-wire type, a circuit of a transformer of a
1-phase 2-wire type or a 1-phase 3-wire type, the maximum rating is “AC220V”.
In case of a circuit which is wired from a 3-phase 4-wire type or the star connection of a 3-phase 3-wire type, the
maximum rating is “AC440V”.

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* Fuse is required to conform to UL.
Note 1: For low voltage circuits, do not connect to
grounding the secondary side of VT and CT.
l
k
l
l
k
l
l
k
l
*2,3,4
（
refer to next page
）
*1,4
（
refer to next page
）
l
k
l
l
k
l
l
k
l
*2,3,4
（
refer to next page
）
*1,4
（
refer to next page
）
l
k
l
l
k
l
l
k
l
l
k
l
l
k
l
*1,4
（
refer to next page
）
(See*3)
(See*4)
(See*4)
(See*3)
(See*2)

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･Use appropriate crimp-type terminal. Appropriate crimp-type terminal is as below.
･Use electric wires as below, and tighten the terminal screws by the torque as below.
Applicable wire
Tightening
torque
Recommended crimp-type terminal
Auxiliary power, voltage
input terminals
stranded wire: AWG26-14(0.13
～
2.0mm2)
single wire
: AWG26-14(
φ
0.41
～
1.62mm)
0.8
～
1.0N
・
m
For M3.5 screw of external diameter below 5.6mm
Current input terminals
stranded wire: AWG18-14(0.82
～
2.0mm2) *5
single wire
: AWG18-14(
φ
1.03
～
1.62mm)
0.5
～
0.6N
・
m
For M3 screw of external diameter below 5.6mm
Input and output terminals
stranded wire : AWG22-14(0.33
～
2.0mm2)
single wire
: AWG22-14(
φ
0.65
～
1.62mm)
0.5
～
0.6N
・
m
For M3 screw of external diameter below 5.6mm
*5: If the diameter of the wire is small, the conductor resistance of the wire will be high and the consumption VA of the wire will increase.
Decide wire diameter and wire length so that it does not exceed the rated burden of CT to be connected.
･Maximum voltage of the circuit connected to this unit directly is 277 / 480V. For the circuit over this voltage, use the transformer.
Using the transformer, primary voltage is configurable up to 6600V.
(Primary voltage of VT can be set up to 6600V, and secondary voltage of VT can be set up to220V as optional setting.)
･For MODBUS®RTU communication wiring, recommended to have the extra length wires about 200mm (When extended to B /
NET transmission from MODBUS®communication, use of MODBUS®RTU communication wiring is possible).
･When screwing the terminals at both ends of the terminal block, be careful not to touch the projection of the terminal block cover.
･In case using external input and/or external output, refer to the following.
External input：For the case of contact input External input: For the case of pulse input
External output：For the case of contact output External output: For the case of pulse output
Caution
*1 For low voltage circuits, do not connect to grounding the secondary side of VT and CT.
*2 When this unit is used at a high voltage circuit, the terminal P0 (P2) must be connected to ground.
*3 When grounding a CT line, please make the L side of the CT a common line and connect 1L,2L,3L terminal
for the unit side by the shortest course.
*4 When connecting the L side of the CT by a common line, please connect 1L, 2L, 3L terminal for the unit
side by the shortest course.
・For protection against noise, transmission lines and input/output lines shall not be placed close to or bound
together with the power lines and high-voltage lines. Keep distance as below between them. (except for
the terminal block)
Condition
distance
Power line 600V or less
300mm or longer
Other power line
600mm or longer
・For the actual usage, connect the FG terminal to ground. (D-type ground: Type 3) Connect it directly to the
ground terminal.
This is being bonded to the conductive part of the product for safety reasons and being connected to the
terminal which is connected the outside protection grounding system.
・Do not connect to FG terminal during the insulation resistance test and pressure test.
・Do not connect together more than one EMU4-FD1-MB on the secondary side of a current transformer.
・Do not connect together other units and EMU4-FD1-MB on the secondary side of a current transformer.
No-voltage a-contact
Use an appropriate type for
5V DC 7mA switching.
No-voltage a-contact
Use an appropriate type for
5V DC 7mA switching.
No-voltage a-contact
35V DC
75mA or,
24V AC 75mA (power factor : 1)
No-voltage a-contact
35V DC
75mA or,
24V AC 75mA (power factor : 1)
Transmitter
Counter
Relay

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System configuration example of MODBUS
®
RTU communication
・Connection of MODBUS®RTU communication terminals:
1. Use the twisted shielded pair cable for transmission lines.(Recommended cable page 66.)
2. About the terminal resistance of the MODBUS®RTU transmission line
・Please get terminal resistance of 120 Ω to the apparatus of transmission line both ends.
(Termination resistances of 120Ωcan be used by short-circuiting “485-” and “Ter” terminals.)
・When you are connected to the PLC on transmission line one, please get terminal resistance of 110 Ω in the PLC side.
(Please refer to Page14, "・Wiring for MODBUS®UNIT(QJ71MB91) and EMU4-FD1-MB "
for the details.)
・When you are connected to the GOT on transmission line one, please get terminal resistance of 110 Ω in the GOT side.
(Please refer to Page14, "・Wiring for GOT（GOT1000）and EMU4-FD1-MB " for the details.)
3. Connect to ground by using thick wires to decrease impedance.
4. MODBUS®RTU transmission lines shall not be placed close to or bound together with the high-voltage lines.
5. Ground the “SLD” terminal at one end.
・wiring terminal
・Procedure for wiring
Ter
SLD
Connect to
Terminal
485-
485+
EMU4-FD1-MB
Installation in the middle of the
transmission rout
Installation at the end of the
transmission rout
MODBUS®RTU

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・Wiring for MODBUS®UNIT(QJ71MB91) and EMU4-FD1-MB
Note) The terminal resistance of the MODBUS®unit (QJ71MB91) side, please connect "110Ω 1/2W".
For details, please refer to "Mitsubishi frequent use sequencer MELSEC-Q Series (QJ71MB91)
MODBUS®interface unit (details).“
・Wiring for GOT(GOT1000) and EMU4-FD1-MB
Note) Please set the terminal resistance of the GOT(GOT1000) "110 Ω".
Please of the setting method refer to " GOT1000 Series Connection Manual (Microcomputer, MODBUS
Products, Peripherals) for GT Works3".

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6. Operating mode
This unit has the operating modes. Switch these modes according to the purposes. The operating mode is displayed
immediately after the auxiliary power loading.
Mode
Function
Reference
Operating
mode
Display measured value digitally. It can display the condition of contact input and present time (*1)
other than the present value of the measured values.
page 49
Setting mode
Set basic setting for phase wire method, primary voltage, primary current and alarm monitoring for
alarm output elements.
page 16
Confirmation
mode
(Test mode)
Mode to confirm the setting value for each setting item.
(The Setting cannot be changed in this mode, so it can be prevented setting change by human
error.)
In addition, this unit has the test function that can be used for such as set up of an equipment.
･Discrimination support display for incorrect wiring:
Display useful to discriminate for incorrect wiring such as phase angle display of voltage,
current.
･Pulse, Alarm test:
Switch pulse output contact and alarm contact without measurement (voltage and current)
input.
･Communication test:
Send back fixed numerical data without measurement (voltage and current) input.
page 30
page 34
Reset mode /
Preset mode
Reset: Integrated values (electric energy, operating time, etc.) can be zeroed.
Preset: Preset of electric energy and reactive energy.
page 56
*1: Only when connecting logging unit.
Preset mode
Operating mode
Presentvalue
display
＋Press both at the same time for 2 sec
SET -
Press for 2 sec
When selecting "End"
on the menu
SET
SET
CANCEL
display
Cancel change of
setting value
SET
End
display
Fix change of setting value
When selecting
"End" on the menu
SET
SET
＋－
Setting mode

(16/71)
7. Setting method
Procedures for setting
Set items such as phase wire system, primary voltage, and primary current in the setting mode to measure and monitor.
Under normal use, it shall be sufficient to set the setting menu 1 (Basic setting) only.
For details, refer to after the following page.
<How to set>
(1) Go into the setting mode by pressing both and at the same time for 2 sec.
(2) Select the setting menu number by pressing or .
(3) Determine the setting menu number by pressing .
(4) Set each setting item.
(5) After all setting are done, select “End” on the setting menu and press .
(6) When prompted for End display, select “End” and press .
Caution
･
Setting menu 5 related to the logging Unit is shifted to Setting mode from Operating mode, and
Please go in a procedure to set only Setting menu 5.page 28
・If you change setting, related setting items and measured data are initialized.
Please check them beforehand. page 31
Phase wire system
Factory default
Primary voltage
(use or non-use of
VT)
Primary voltage
(With VT or Direct)
Primary current
Secondary current
Current demand
ti me
Model Name
MODBUS®RTU
address
MODBUS®RTU
baud rate
MODBUS®RTU
parity
MODBUS®RTU
stop bit
Contact / pulse
input
Reset method
of contact input
Contact / pulse
output
"End" display
Unit amount of
pulse output
※3
Equivalent CO2
indication
※4
CO2 conversion
factor
※5
Harmonic current
indication
Harmonic voltage
indication
Operating time
indication
Counting method
of operating time
※2
Primary special
voltage
Secondary special
voltage
Primary voltage
(VT voltage)
※1
※2
Operating mode
Measurement display
Fix of setting
value change
Cancel of setting
value change
"CANCEL" display
Transition automatically
Example of setting
mode display
Example of confirmation
mode display
End of setting menu
Setting menu 1
Basic setting
Setting menu 2
Communication setting
Setting menu 3
Input/output setting
For the special voltage (SP)
(Not available for 1P3W)
※11
- / RESET
SET
+ / PHASE
- / RESET
SET
SET
SET

(17/71)
Procedures for setting
･Basic operations in setting
Function
Operation
Supplement
Choose setting value
Press
or .
Press for more than one second to
fast-forward
confirm setting value Press .
After setting value is confirmed, transition
to next item.
Go back the previous setting item
Press .
Setting value of the last item before return
is effective.
Go back to setting menu during setting
Press for one second.
Reset setting values to factory default.
"DISP" ＋"－"
Press once
Cancel change of setting value.
"SET"
Press once
Skip other items during setting.
"SET"
Press for 1 sec
Memorize changed setting and transition to operating
mode.
"SET"
Press once
Select "CANCEL".
"+" or "-"
Press once
No display
Select setting value.
"+" or "-"
Press several times
Transition to "End" display.
"SET"
Press once
Enter each setting display or transition to next item.
"SET"
Press once
Go back to previous setting display.
"DISP"
Press once
Transition from operating mode to confirmation mode
"SET"
Press for 2 sec
Select menu number or "End".
"+" or "-"
Press several times
Sy mbo l
Behavior
Operation of control button
Transition from operating mode to setting mode.
"SET" + "-"
Press both at the
same time for 2 sec
Use of upper /
lower limit alarm
Upper / lower limit
alarm element
Upper / lower limit
alarm value
Alarm delay time
Alarm reset
method
Logging module
ID
Logging data clear
confirmation
Test mode
※6
※10
Setting menu 4
Alarm setting
Setting menu 5
MODBUS®TCP setting / Logging setting
Setting menu 6
Test mode
Setting mode or confirmation mode
※1: On confirmation mode, transition to operating mode.
※2: Transition only when selecting "SP" for "Primary voltage
(VT or direct voltage)" on Setting menu 1.
(For 3P4W , only special voltage is available when using VT.)
※3: Transition only when selecting "CO.P." for "Contact/pulse
input".
※4: Transition only when selecting "PLS" for "Contact/pulse
output".
※5: Transition only when selecting "on" for "Equivalent CO2
indication".
※6: Transition only when selecting "on" for "Use of upper/lower
li mit alarm".
※7: Transition only when connecting MODBUS®TCP module.
※8: Transition only when selecting "on" for MODBUS®TCP
Default G/W existence".
※9: Transition only when connecting logging module.
※10: Not displayed on setting mode.
※11: The following data is not cleared.
Electric energy (consumption, regeneration),
Reactive energy,
Equivalent CO2 (hide),
Operation time (hide)
When selecting "CO.P."for "Counting method of operating
※7
US®TCP
ddress
※9
BUS®TCP
net mask
BUS®TCP
ault G/W
BUS®TCP
ault G/W
DBUS®TCP
Reset
※8
DISP
+ / PHASE
- / RESET
SET
SET

(18/71)
Setting menu 1: Phase wire system, primary voltage, primary current, demand time, etc.
In this menu, set phase wire system, primary voltage, primary current, demand time, etc.
In operating mode, press both and at the same time for more than two seconds to transition to setting
mode and enable the following operations.
(3) Primary voltage
(Direct)
Set the direct voltage according to voltage of the measured circuit
･In case you choose “3P4”in (1) Phase wire system
･In case you choose “3P3” or “1P2”in (1) Phase wire system
63.5V/110V
100V/173V
105V/182V
110V/190V
115V/199V
120V/208V
127V/220V
200V/346V
220V/380V
230V/400V
240V/415V
242V/420V
250V/430V
254V/440V
265V/460V
277V/480V
110V 220V 440V
Setting menu
Choose the setting menu 1.
(As shown in the left figure)
(1) Phase wire system
Set according to the phase wire system for the measured circuit.
3P4: Three-phase 4-wire
1P2: Single-phase 2-wire
1P3: Single-phase 3-wire
3P3: Three-phase 3-wire
Supplement: The underlined values are the defaults. (The same shall apply hereinafter.)
(2) Primary voltage
(Use or non-use of VT)
If you measure directly (i.e. without VT):
→Choose “no” and press to transition to (3) Primary voltage (Direct).
If you measure with VT:
→Choose “yES” and press to transition to (4) Primary voltage (VT).
no
Supplement:
“VT” means Voltage Transformer.
SET
SET
<In case you choose “1P3” in (1) Phase wire system>
You can use direct measurement only.
Setting of primary voltage is skipped and setting is started
from (7) Primary current
Rated voltage between 1- and 2-phase and 2- and 3-phase is
110V, and that between 1- and 3-phase is 220V.
yES
- / RESET
SET
SET DISP
DISP
SET
SET DISP
SET DISP

(19/71)
Setting menu 1: Phase wire system, primary voltage, primary current, demand time, etc.
(4) Primary voltage
(with VT)
Set the primary voltage of combined VT
Caution:
If there is no values above you want to set to, choose “SP” to enable the special primary
voltage and the special secondary voltage.
In case you choose “3P4” (three-phase 4-wire system) in (1) Phase wire system, the
special voltage is only available.
690V 1100V 2200V 3300V 6600V SP
If you choose “SP”, transition to “(5) Special primary voltage”.
If you choose the value except for “SP”, transition to “(7) Primary current ”.
(In this case, secondary voltage is fixed to 110V.)
(5) Special primary
voltage
Set the special primary voltage of combined VT.
･Setting range: 1V to 6600V
Default value is 690V
Setting of special primary voltage
･Press or to choose the value at flashing digit.
･Press for the setting digit (flashing digit) to shift to lower.
･Press for the setting digit (flashing digit) to shift to upper.
･You can set the upper three digit of the value to the range of 1V to 6600V.
Caution: In case you set the value except for between 1V and 6600V, indicate the error (E005).
When indicating the error, press to check the setting values and set the new
value again.
･Press at the lowest digit to transition to “(6) Special secondary voltage”.
The values set the upper fourth digit and lowers to are rounded down. After setting value flashes
three times, transition to “(6) Special secondary voltage”.
- / RESET+ / PHASE
SET
DISP
SET
SET
(6) Special secondary
voltage
Set the special secondary voltage of combined VT.
･Setting range: 1V to 220V
Default value is 110V (for three phase 3-wire system and single-phase 2-wire
system), or 64V (for three-phase 4-wire system).
Setting of special secondary voltage
･Press or to choose the value at flashing digit.
･Press for the setting digit (flashing digit) to shift to lower.
･Press for the setting digit (flashing digit) to shift to upper.
･You can set the value to the range of 1V to 220V.
Caution: In case you set the value except for between 1V and 220V, indicate the error (E005).
When indicating the error, press to check the setting values and set the new
value again.
･Press at the lowest digit to transition to “(7) Primary current”.
- / RESET+ / PHASE
SET
DISP
SET
SET
DISP
SET
SET DISP
SET DISP