Mitsubishi Electric FR A8AVP v2 Instruction Manual
en
INVERTER
OUTLINE 1
INSTALLATION AND WIRING 2
FUNCTION 3
Plug-in option
FR-A8AVP INSTRUCTION MANUAL (FOR PHASE- SYNCHRONIZED BYPASS SWITCHING)
Phase-synchronized bypass switching function
2 Safety instructions
Thank you for choosing this Mitsubishi Electric inverter plug-in option. This Instruction Manual provides handling information and precautions for use of the this product. Incorrect handling might cause an unexpected fault. Before using this product, all relevant instruction manuals carefully to ensure proper use. Please forward this Instruction Manual to the end user.
Electric shock prevention
Injury prevention
Additional instructions The following instructions must be also followed. If this product is handled incorrectly, it may cause unexpected fault, an injury, or an electric shock.
Safety instructions Do not attempt to install, operate, maintain or inspect this product until you have read this Instruction Manual and appended documents carefully. Do not use this product until you have a full knowledge of this product mechanism, safety information and instructions. In this Instruction Manual, the safety instruction levels are classified into "WARNING" and "CAUTION".
Incorrect handling may cause hazardous conditions, resulting in death or severe injury.
Incorrect handling may cause hazardous conditions, resulting in medium or slight injury, or may cause only material damage.
Note that even the level may lead to a
serious consequence depending on conditions. Be sure to follow the instructions of both levels as they are critical to personnel safety.
WARNING Do not remove the front cover or the wiring cover of the inverter
while the inverter power is ON. Do not operate the inverter with any cover or wiring cover removed, as accidental contact with exposed high-voltage terminals and internal components may occur, resulting in an electrical shock. Even if power is OFF, do not remove the front cover of the
inverter except for wiring or periodic inspection as you may accidentally touch the charged circuits and get an electric shock. Before wiring or inspection, check that the display of the inverter
operation panel is OFF. Any person who is involved in wiring or inspection shall wait for 10 minutes or longer after the power supply has been cut off, and check that there are no residual voltage using a tester or the like. The capacitor is charged with high voltage for some time after power OFF, and it is dangerous. Any person who is involved in wiring or inspection of this product
shall be fully competent to do the work. This product must be installed before wiring. Otherwise you may
get an electric shock or be injured. Do not touch this product or handle the cables with wet hands.
Doing so may cause an electric shock. Do not subject the cables to scratches, excessive stress, heavy
loads or pinching. Doing so may cause an electric shock.
CAUTION The voltage applied to each terminal must be as specified in the
Instruction Manual. Otherwise a burst, damage, etc. may occur. The cables must be connected to the correct terminals.
Otherwise a burst, damage, etc. may occur. The polarity (+ and -) must be correct. Otherwise a burst or
damage may occur. While power is ON or for some time after power OFF, do not
touch the inverter as it will be extremely hot. Doing so may cause a burn.
WARNING
CAUTION
CAUTION
CAUTION Transportation and installation Do not install or operate this product if it is damaged or has parts
missing. Do not stand or place any heavy object on this product. The installing orientation of this product must be correct. Foreign conductive objects must be prevented from entering the
inverter. That includes screws and metal fragments or other flammable substance such as oil. If halogen-based materials (fluorine, chlorine, bromine, iodine,
etc.), included in fumigants to sterilize or disinfect wooden packages, infiltrate into this product, the product may be damaged. Prevent residual fumigant components from being infiltrated into the product when packaging, or use an alternative sterilization or disinfection method (heat disinfection, etc.). Note that sterilization or disinfection of wooden package should be performed before packing the product.
Wiring Never connect a PM motor to the commercial power supply.
Applying the commercial power to the input terminals (U, V, W) on a PM motor will burn the PM motor.
Test operation Before starting the test operation, confirm or adjust the
parameter settings. Failure to do so may cause some machines to make unexpected motions.
WARNING Usage Do not modify this product. Do not remove any part which is not instructed to be removed in
the Instruction Manuals. Doing so may lead to a failure or damage of this product.
CAUTION Usage As all parameters return to their initial values after Parameter
clear or All parameter clear is performed, the needed parameters for operation of the inverter and this product must be set again before the operation is started. To avoid damage to this product due to static electricity, static
electricity in your body must be discharged before you touch this product.
Maintenance, inspection and parts replacement Do not carry out a megger (insulation resistance) test. Disposal This product must be treated as industrial waste.
General instruction
For clarity purpose, illustrations in this Instruction Manual may be drawn with covers or safety guards removed. Ensure all covers and safety guards are properly installed prior to starting operation.
CONTENTS 3
1 OUTLINE 4 1.1 Pre-operation instructions 4
1.1.1 Unpacking and checking the product................................................................................................................4 1.1.2 Component names ...........................................................................................................................................6 1.1.3 Terminals ..........................................................................................................................................................6
1.2 Pre-installation instructions for the FR-A8AVP 7
1.3 Installation procedure 7
2 INSTALLATION AND WIRING 9 2.1 Installation of the phase detection transformer box (FR-A8VPB) 9
2.1.1 Installation.........................................................................................................................................................9 2.1.2 Outline dimension drawings............................................................................................................................12
2.2 Connection diagram 13
3 FUNCTION 16 3.1 Setting the phase detection transformer box (FR-A8VPB) input voltage 16
3.2 Phase-synchronized bypass switching function 17
APPENDIX 26 Appendix1 Restricted Use of Hazardous Substances in Electronic and Electrical Products.............. 26
CONTENTS
Pre-operation instructions
4 OUTLINE
1 OUTLINE
1.1 Pre-operation instructions This Instruction Manual explains the phase-synchronized bypass switching function. For instructions to convert between the
inverter and the converter, refer to the FR-A8AVP Instruction Manual (For Inverter/Converter Switching) (IB-0600777ENG).
Features of the product The phase-synchronized bypass switching function permits smooth switching of the motor power supply from the inverter
output power to the commercial power. The shock caused by the switch is suppressed because the inverter output voltage
phase is synchronized with the commercial power voltage phase.
Stand-alone option The following stand-alone option is required for the phase-synchronized bypass switching function. Check the model and
quantity of the option.
1.1.1 Unpacking and checking the product Take the product out of the package, check the product name, and confirm that the product is as you ordered and intact.
This product is a plug-in option made for the FR-A800/F800 series inverters.
Product confirmation Check the enclosed items.
The stickers are not required to use the phase-synchronized bypass switching function
Model name Product name Quantity FR-A8VPB-H Phase detection transformer box 1
Plug-in option: 1 Mounting screw (M3 8 mm): 2 (Refer to page 7.)
Spacer: 2 (Refer to page 7.)
Converter sticker sheet: 1
CONVERTER
R4/L14 S4/L24 T4/L34
C172D692HXX
Pre-operation instructions
OUTLINE 5
1
SERIAL (serial number) check The FR-A8AVP can be used with the models of inverters listed which have the following SERIAL. Check the SERIAL
indicated on the inverter rating plate or package.
Rating plate example
FR-A800 series
FR-A800 Plus series
FR-F800 series
Applicable inverter Country of origin
indication SERIAL
FR-A840(-E)(-GF): 00023(0.4K) to 06830(280K) FR-A842(-E)(-GF): 07700(315K) to 12120(500K) FR-A846(-E): 00023(0.4K) to 03610(132K)
MADE in Japan 86 or later
MADE in China 87 or later
Applicable inverter Country of origin
indication SERIAL
FR-A840(-E)-CRN: 00023(0.4K) to 06830(280K) FR-A842(-E)-CRN: 07700(315K) to 12120(500K) FR-A840-LC: 03250(110K) to 06830(280K)
MADE in Japan 86 or later
MADE in China 87 or later
Applicable inverter Country of origin
indication SERIAL
FR-F840(-E): 00023(0.75K) to 06830(315K) FR-F842(-E): 07700(355K) to 12120(560K) FR-F846(-E): 00023(0.75K) to 03610(160K)
MADE in Japan 86 or later
MADE in China 87 or later
SERIAL
Country
of origin
FR-A840-00023-1
Symbol Year Month Control number
SERIAL
The SERIAL consists of one symbol, two characters indicating the production year and month, and six characters indicating the control number. The last digit of the production year is indicated as the Year, and the Month is indicated by 1 to 9, X (October), Y (November), or Z (December).
Pre-operation instructions
6 OUTLINE
1.1.2 Component names
1.1.3 Terminals
Symbol Name Description Refer to
page
a Mounting hole Used to fix this product to the inverter by inserting a mounting screw or a spacer.
7
b Terminal block Used to connect this product to the phase detection transformer box. 13
c Switch (SW1) for manufacturer setting Do not change the switch setting from the initial setting (OFF: ).
d Board mounted option connector Used to connect this product to the option connector on the inverter. 7
Type Symbol Function description
In pu
t
R2 Input terminals for the analog signal used for the R-S detection. Terminal RS2 is the common terminal for terminal R2. Connect each terminal to the same-name terminal on the phase detection transformer box.RS2
T2 Input terminals for the analog signal used for the T-S detection. Terminal TS2 is the common terminal for terminal T2. Connect each terminal to the same-name terminal on the phase detection transformer box.TS2
O ut
pu t RYA
Not used.RSO
SE2
Front view Rear view
Terminal layout R
2
T 2
R S
2
S E
2
R YA
R S
O
T S
2 SW1
(a) (d)
(a)
(b) (a)
(a)(a)
(a)
(c)
O N
Pre-installation instructions for the FR-A8AVP
OUTLINE 7
1
1.2 Pre-installation instructions for the FR- A8AVP
Check that the inverter's input power and the control circuit power are both OFF.
1.3 Installation procedure
Option connector 2 on the FR-A800-E/FR-F800-E inverters is not available for use because it is occupied by the Ethernet board which is pre-
installed in the initial status. To install this product to option connector 2, remove the Ethernet board. Be aware that Ethernet communication will
be disabled.
CAUTION Do not install or remove this product while the inverter power is ON. Doing so may damage the
inverter or this product.
To avoid damage due to static electricity, static electricity in your body must be discharged before
you touch this product.
(1) Remove the inverter front cover.
(2) Insert two spacers into the mounting holes that will not be used for
mounting screws (see the diagrams to identify the holes).
(3) Fit the board mounted option connector on this product to the guide
of the option connector on the inverter, and insert the option as far
as it goes.
(4) Fasten this product to the inverter using the two mounting screws
through the holes on either side (tightening torque: 0.33 to 0.40
Nm). If the screw holes do not line up, the connector may not be
inserted deep enough. Check the connector.
Example: Attachment of this product to connector 1
Spacer
Spacer
Inverter option connector
Spacer
Spacer
Spacer
Mounting screw
Mounting screw
Spacer
Spacer
Mounting screw
Connector 1Connector 21
Mounting screw
Spacer
Connector 3
Insertion positions for screws and spacers
Installation procedure
8 OUTLINE
NOTE
When installing/removing the plug-in option, hold the sides of the option. Do not press on the parts on the option circuit board.
Stress applied to the parts by pressing, etc. may cause a failure.
Be careful not to drop mounting screws during the installation or removal of the plug-in option.
Only one option attached to the option connector with high priority can function at once if more than one option of the same
name are installed together on an inverter. Priority is given to option connectors in ascending order (1 to 3), and options
having a lower priority do not function.
When the inverter cannot recognize the option due to improper installation or any other reason, the protective function (E.1 to
E.3) is activated and the inverter cannot be operated. The indication to be shown depends on the position (option connector
1 to 3) used.
When removing the plug-in option, remove the two screws on either side, and then pull it straight out. Pressure applied to the
option connectors and to the option board may break the option.
Mounted position Fault indication
Option connector 1
Option connector 2
Option connector 3
Installation of the phase detection transformer box (FR-A8VPB)
INSTALLATION AND WIRING 9
2
2 INSTALLATION AND WIRING
2.1 Installation of the phase detection transformer box (FR-A8VPB)
2.1.1 Installation Checking the rating plate of the FR-A8VPB Before installing the transformer box, check the values to be set in Pr.1344 and Pr.1345 described on its rating plate, and take
a note of them. The values you keep will be needed to set Pr.1344 and Pr.1345 in the inverter. (Refer to page 16.)
Clearances
Installation place Install the transformer box on nonflammable wall surface. Otherwise a fire may occur.
Surrounding environment The transformer box must be used indoors (without corrosive gas, flammable gas, oil mist, dust and dirt). Otherwise the
transformer box may be damaged.
Installation orientation Install the transformer box in a vertical position.
10 cm or more
10 cm or more
5 cm or more5 cm or more 5 cm or more
Rating plate
Vertical
Installation of the phase detection transformer box (FR-A8VPB)
10 INSTALLATION AND WIRING
Removal and reinstallation of the front cover
Removal
Reinstallation
NOTE
Fully make sure that the front cover has been reinstalled securely. Always tighten the mounting screws of the cover.
The capacity plate is placed on the cover, and the rating plate is on the remainder of the transformer box. For reinstallation,
check the serial number on the capacity plate against the one on the rating plate to make sure they are identical with each
other.
Front cover
Front cover
Loosen the mounting screws of the cover. Pull out the cover to remove it.
Place the cover back into position. Tighten the mounting screws of the cover
(tightening torque: 1.7 Nm).
Installation of the phase detection transformer box (FR-A8VPB)
INSTALLATION AND WIRING 11
2
Wiring method Cut small slits in the rubber grommets mounted on the underside of the transformer box, and pass the cables through the slits.
NOTE
To satisfy IP20 protection requirements, note the following points for wiring of the transformer box.
- Do not make any unneeded slit in grommets which do not need cable management.
- Do not use the transformer box with the rubber grommets removed.
Terminals
Terminal layout
Terminal screw size
Symbol Description Rating R Input terminal for detection of the R-phase voltage of the system power supply.
Maximum permissible input voltage: 506 VAC
S Input terminal for detection of the S-phase voltage of the system power supply.
T Input terminal for detection of the T-phase voltage of the system power supply.
R2 Output terminals for the analog signal used for the R-S detection. Terminal RS2 is the common terminal for terminal R2. These terminals are isolated from the main circuit. Connect each terminal to the same-name terminal on the FR-A8AVP.
RS2
T2 Output terminals for the analog signal used for the T-S detection. Terminal TS2 is the common terminal for terminal T2. These terminals are isolated from the main circuit. Connect each terminal to the same-name terminal on the FR-A8AVP.
TS2
Earthing (grounding) of the phase detection transformer box. This must be earthed (grounded).
Model name Terminals R, S, T, R2,
RS2, TS2, and T2 Earth (ground)
terminal FR-A8VPB-H M3.5 M3.5
R R2 RS2 TS2 T2S T
Installation of the phase detection transformer box (FR-A8VPB)
12 INSTALLATION AND WIRING
2.1.2 Outline dimension drawings
26
218 (with rubber bush)
(7 .5
) 2
4 5
7 .5
7 4
.6
2 6
0
Rating plate
616.6
15 80
110 120
1.6
(15)
(38)3438
(Unit: mm)
Mass: 3.2 kg
Connection diagram
INSTALLATION AND WIRING 13
2
2.2 Connection diagram A typical connection diagram for use of the electronic bypass sequence is as follows.
[Example for the standard model or IP55 compatible model of the FR-A800 series inverter]
[Example for the separated converter type of the FR-A800 series inverter]
Inverter start (forward rotation)
MC1
R/L1 S/L2 T/L3
STF
R1/L11
S1/L21
RES SD
10 2 5
U V W
External
thermal relay
IM
MC1
MC2
SE
1
1
1
2 MC3
MC2
24 VDC
MC1
External thermal
Frequency setting signal
MC3
Inverter/bypass
Operation interlock
3OH
MCCB
MC2
MC3
MC2
MC3
CS
MRS
PWS
FR-A8AVP
R2 RS2 TS2 T2
FR-A8VPB
R S T
R2 RS2 TS2
T2
Phase synchronization command
for bypass switching
3
4
AC reactor
(FR-HAL)
R
S
T Z
Y
X
4
Inverter
Reset
Inverter start (forward rotation)
MC1
R/L1 S/L2
R1/L11 S1/L21
T/L3 STF
R1/L11 S1/L21
P/+
N/-
MRS (X10)RDA
10 2 5
U V
P/+ N/-
W
External
thermal relayInverterConverter unit
IM
MC1
MC2
SE
1
1
1
2 MC3
MC2
24 VDC
MC1
Frequency setting signal MC3
Inverter/bypass
Operation interlock
Phase synchronization command for bypass switching
3
MCCB
MC2
SDSE
MC3
MC2
MC3
ALM
Y214
X95
X96
RESRSO
5 5
3 3
AC reactor
(FR-HAL)
R
S
T Z
Y
X
RES SD
External
thermal OH
RH (MRS) 3 CS
PWS
FR-A8AVP
R2 RS2 TS2 T2
FR-A8VPB
R S T
R2 RS2 TS2
T2
44
Reset
Connection diagram
14 INSTALLATION AND WIRING
Be careful of the capacity of the sequence output terminals.
The applied terminals differ depending on the settings of Pr.190 to Pr.196 (Output terminal function selection).
When connecting a DC power supply, insert a protective diode.
When connecting an AC power supply, use the relay output option (FR-A8AR), and use contact outputs.
The applied terminals differ depending on the settings of Pr.180 to Pr.189 (Input terminal function selection).
Use the wires satisfying the following requirements for each wiring location.
To use the signal, assign the function to the output terminal using Pr.190 to Pr.195 (Output terminal function selection) in the converter unit.
Always set the negative logic for the ALM signal.
NOTE
Use the electronic bypass function in External operation mode. For proper operation, terminals R1/L11 and S1/L21 on the
converter unit and the inverter must be connected between a molded case circuit breaker (MCCB) and magnetic contactor
(MC) 1.
Be sure to provide a mechanical interlock between MC2 and MC3.
Status of magnetic contactor (MC1, MC2, MC3)
Magnetic contactor
Installation location Status
During commercial power supply operation
During inverter operation
During inverter fault
MC1 Between power supply and inverter input
Closed (Shorted) Closed (Shorted) Open (Status changes to shorted state after the reset.)
MC2 Between power supply and motor
Closed (Shorted) Open
Open (Status depends on Pr.138 setting. Always open when the external thermal relay is operating.)
MC3 Between inverter output and motor
Open Closed (Shorted) Open
Output terminal capacity Output terminal permissible load
Open collector output of inverter (RUN, SU, IPF, OL, FU) 24 VDC 0.1 A
Inverter relay output (A1-C1, B1-C1, A2-B2, B2-C2) Relay output option (FR-A8AR)
230 VAC 0.3 A 30 VDC 0.3 A
Wiring location Wire gauge (mm2) Total wiring
length Wiring between the power supply and the phase detection transformer box
2 10 m or less
Wiring between the phase detection transformer box and the inverter
0.75 to 1.25 5 m or less
Connection diagram
INSTALLATION AND WIRING 15
2
Input signal list
Output signal list
The LSYN signal is active only when Pr.139 = "9999".
Signal name
Terminal Function Description MC status
MC1 MC2 MC3
MRS MRS Electronic bypass switching function (enable/disable)
ON: Electronic bypass switching function enabled.
OFF: Electronic bypass switching function disabled.
Unchanged
CS CS Electronic bypass switching function (operation selection)
ON: Inverter operation
OFF: Commercial power supply operation
PWS
Terminal selected from Pr.180 to Pr.189 to set "33".
Phase synchronization command for bypass switching
ON: Frequency command specifying the frequency of the commercial power supply
Unchanged Unchanged Unchanged
OFF: Frequency command specifying the set frequency
Unchanged Unchanged Unchanged
STF/ STR
STF/STR Inverter operation command (Disabled during commercial power supply operation)
ON: Forward/reverse rotation command
OFF: Command to stop operation
OH
Terminal selected from Pr.180 to Pr.189 to set "7".
External thermal relay input ON: Motor normal
OFF: Motor fault
RES RES Operation reset ON: Operation reset. Unchanged Unchanged
OFF: Operation continues.
X95/X96
Terminal selected from Pr.180 to Pr.189 to set "95/96".
Converter unit fault input / Converter unit fault (E.OHT, E.CPU) input
X95 OFF, X96 OFF: Converter fault (E.OHT or E.CPU)
X95 ON, X96 ON: Converter normal
X95 OFF, X96 ON: Converter fault (other than E.OHT and E.CPU)
For separated converter types, the X10 signal is assigned to terminal MRS in the initial setting. To use the MRS signal, set "24" in any of
Pr.180 to Pr.189 (Input terminal function selection) to assign the function to a terminal.
When the MRS signal is OFF, neither the commercial power supply operation nor the inverter operation can be performed.
The CS signal is active only when the MRS signal is ON. For the F800 series inverters, no function is assigned to terminals CS in the initial
setting. To enable the CS signal, set "6" in Pr.186 CS terminal function selection to assign the function to terminal CS.
The STF/STR signal is active only when both the MRS and CS signals are ON.
Whether or not to enable reset input using the RES signal depends on the setting of Pr.75 Reset selection/disconnected PU detection/PU
stop selection. When the RES signal and another signal are simultaneously input, the RES signal has higher priority to determine the
operation of MCs.
MC1 opens at an inverter fault.
MC2 opens when Pr.138 (Automatic bypass switching after inverter fault) = "0" (disabled), and MC2 closes when Pr.138 = "1" (enabled).
MC status
: Closed
: Open
: MC2 is open and MC3 is closed during inverter operation
MC2 is closed and MC3 is open during commercial power supply operation.
Unchanged: The status of the MC remains the same after turning ON or OFF of the signal.
Signal name
Terminal (Pr.190 to Pr.196 setting)
Description
MC1 17 Output signal to control MC1 installed on the inverter input side.
MC2 18 Output signal to control MC2 installed for commercial power supply operation.
MC3 19 Output signal to control MC3 installed on the inverter output side.
LSYN 247 Signal output when phase synchronization for bypass switching has completed.
Setting the phase detection transformer box (FR-A8VPB) input voltage
16 FUNCTION
3 FUNCTION
3.1 Setting the phase detection transformer box (FR-A8VPB) input voltage
The setting is applied after an inverter reset.
Set the values specified on the rating plate of the FR-A8VPB in Pr.1344 and Pr.1345. (If the Pr.1344 and Pr.1345 settings
are not consistent with the values specified on the rating plate of the FR-A8VPB, the phase of the power supply cannot be
accurately detected. This may increase shock in switching between two different power supplies or activate the protective
function against the overcurrent or overvoltage.)
NOTE
Stop the inverter operation before setting Pr.1344 and Pr.1345.
Adjust the phase detection transformer box (FR-A8VPB) input voltage as follows.
Pr. Name Initial value
Setting range Description
1344 E320
R-S turns ratio compensation
9999 95.0% to 105.0% Compensates for fluctuations in the input voltage.
9999 Compensation disabled.
1345 E321
T-S turns ratio compensation
9999 95.0% to 105.0% Compensates for fluctuations in the input voltage.
9999 Compensation disabled.
MODEL
MITSUBISHI ELECTRIC CORPORATION
FR-A8VPB-H
PARAMETER PARAMETER
% %
Pr. 1344 = Pr. 1345 =
DATE
Set Pr.1344 and Pr.1345 as specified.
Phase-synchronized bypass switching function
FUNCTION 17
3
3.2 Phase-synchronized bypass switching function
The inverter contains complicated sequence circuits for switching between the commercial power supply operation and
inverter operation. Therefore, interlock operation of the magnetic contactor for switching can be easily performed by
simply inputting start, stop, and automatic switching selection signals.
Pr. Name Initial value
Setting range
Description
1 H400
Maximum frequency 120 Hz
0 to 120 Hz Set the upper limit of the output frequency. 60 Hz
57 A702
Restart coasting time 9999
0 Coasting time differs according to the inverter capacity.
0.1 to 30 s Set the waiting time for the inverter to perform a restart at power restoration after instantaneous power failure.
9999 No restart
58 A703
Restart cushion time 1 s 0 to 60 s Set the voltage cushion time for restart.
135 A000
Electronic bypass sequence selection
0 0 Electronic bypass sequence function disabled.
1 Electronic bypass sequence function enabled.
137 A002
Start waiting time 0.5 s 0 to 100 s
Set the time a little longer than required (typically 0.3 to 0.5 seconds) of the magnetic contactor 3 (MC3) to produce a magnetic field to attract its armature after the MC3 signal turns ON.
138 A003
Bypass selection at a fault
0
0 Inverter output stop (motor coasting) at inverter failure
1
Automatic switchover to commercial power supply operation at inverter failure. (Switchover is not possible when the External thermal relay operation fault (E.OHT) or CPU fault (E.CPU) has occurred.)
139 A004
Automatic switchover frequency from inverter to bypass operation
9999
0 to 60 Hz When a frequency is set in this parameter, phase synchronization is disabled.
8888
Automatic bypass switching enabled with phase synchronization enabled. The inverter operation automatically switches to the commercial power supply operation when phase synchronization has completed.
9999 Automatic bypass switching disabled (manual switching enabled) with phase synchronization enabled.
159 A005
Automatic switchover frequency range from bypass to inverter operation
9999
0 to 10 Hz
While automatic bypass switching is enabled (Pr.139 "9999"), the frequency set in this parameter is used to determine the frequency at which the commercial power supply operation is switched back to inverter operation. When the frequency command becomes less than the frequency obtained by subtracting the frequency set in this parameter from the commercial power supply frequency, the motor switches automatically to inverter operation and operates at the frequency of the frequency command. Turning OFF the inverter start command (STF/STR signal) also switches the operation to the inverter operation.
9999
To switch from the commercial power supply operation to the inverter operation again while Pr.139 "9999", turn OFF the inverter start command (STF/STR signal). After the switchover, the motor decelerates to a stop.
1382 A010
MC switchover interlock time (for phase- synchronized bypass switching function)
1000 ms 1 to 60000 ms
Set the operation interlock time between MC2 and MC3 (refer to page 22). When the FR-A8AVP is installed, Pr.136 MC switchover interlock time is disabled. (For information about Pr.136, refer to the Instruction Manual (Detailed) of the inverter.)
1383 A011
Phase compensation amount for synchronous bypass switching
0 0 to 359 Set an angle to compensate for the phase difference caused by the motor coasting during MC switchover interlock (refer to page 22).
1384 A012
PLL tuning gain 100% 0% to 500% Use this parameter to change the phase locked loop (PLL) gain if an overcurrent or overvoltage occurs during output frequency compensation (refer to page 22).
V/F Magnetic flux
Phase-synchronized bypass switching function
18 FUNCTION
For the FR-A840-01800(55K) or lower, and FR-A840-01160(55K) or lower.
For the FR-A840-02160(75K) or higher, and FR-F840-01800(75K) or higher.
The coasting time when Pr.57 = "0" is as follows. (When Pr.162 Automatic restart after instantaneous power failure selection is set to the
initial value.)
FR-A840-00052(1.5K) or lower, and FR-F840-00038(1.5K) or lower: 0.5 seconds
FR-A840-00083(2.2K) to FR-A840-00250(7.5K), and FR-F840-00052(2.2K) to FR-F840-00170(7.5K): 1 second
FR-A840-00310(11K) to FR-A840-01800(55K), and FR-F840-00250(11K) to FR-F840-01160(55K): 3.0 seconds
FR-A840-02160(75K) or higher, and FR-F840-01800(75K) or higher: 5.0 seconds
Electronic bypass sequence function When operating the motor at 60 Hz (or 50 Hz), the motor can be more efficiently operated with a commercial power supply.
In addition, if the motor cannot be stopped for a long period of time even for an inverter maintenance and inspection, it is
recommended that a commercial power supply circuit be installed.
When switching between inverter operation and commercial power supply operation, make safety provisions to absolutely
prevent the commercial power supply accidentally being applied to the output side of the inverter. Be sure to mechanically
interlock two magnetic contactors (MCs) for the inverter operation and for the commercial power supply operation to
prevent two MCs from being closed at the same time.
Complicated switching control between the commercial power supply operation and the inverter operation is possible by
using the inverter's electronic bypass sequence function which can output timing signals to control the operation of MCs.
Phase-synchronized bypass switching function Set Pr.139 = "8888 or 9999", and then turn ON the Phase synchronization command (PWS) signal. The frequency
command will be changed to specify the frequency of the commercial power supply.
The output frequency compensation will be added for phase synchronization between the commercial power supply and
the inverter output voltage.
When the following conditions are satisfied and the state which passes the conditions remains for more than one second, it
is recognized as the end of phase synchronization.
- The frequency difference between the commercial power supply and the inverter output power is within 5 Hz.
- The phase difference between the commercial power supply and the inverter output voltage is within a value set in
Pr.1383 5.
When Pr.139 = "9999", the Phase synchronization completion (LSYN) signal is output after phase synchronization for
bypass switching has completed. Turning OFF the CS signal after the LSYN signal has been output allows the switching to
the commercial power supply operation.
When Pr.139 = "8888", the inverter operation automatically switches to the commercial power supply operation after phase
synchronization has completed. (The LSYN signal is not output.)
NOTE
The requirements to enable the phase-synchronized bypass switching function are as follows.
- Electronic bypass sequence function is enabled (Pr.135 = "1").
- The forward rotation command (STF) signal is ON.
- V/F control, or Advanced magnetic flux vector control is selected.
Phase-synchronized bypass switching function
FUNCTION 19
3
Electronic bypass operation sequence Example of operation sequence when automatic bypass switching disabled (Pr.139 = "9999")
Example of operation sequence when automatic bypass switching enabled (Pr.139 = "8888", Pr.159 "9999")
ON
OFF Power supply
Phase difference
ON
OFF
Operation interlock
(MRS)
ON
OFF
Inverter run command
(STF)
ON
OFF
Inverter/commercial
power supply (CS)
ON
OFF
Phase synchronization
command (PWS)
ON
OFF
Phase synchronization
completion (LSYN)
ON
OFF
Inverter input side MC
(MC1)
ON
OFF
ON
OFF
Each timer
Operating status
(motor speed)
INV
operation
Coasting Bypass
operation
Coasting INV
operation
Stop
ON: Operation enabled
OFF: Operation disabled
ON: Forward rotation
OFF: Stop
ON: Inverter operation
OFF: Commercial power supply operation
Indicates the delay time until
the MC turns on (off).
A: Pr.1382 MC switchover interlock time B: Pr.137 Start waiting time
C: Pr.57 Restart coasting time
D: Pr.58 Restart cushion time
Inverter output side MC
(MC3)
MC for commercial
power supply operation
(MC2)
1 s
Pr.1383 5
Frequency command Output frequency
Time
Time
Commercial power supply frequency 5 Hz
Off only at inverter alarm
C A A B C D
STF
Time
Time
Actual motor speed
A: Pr.1382 MC switchover interlock time B: Pr.137 Start waiting time
C: Pr.57 Restart coasting time D: Pr.58 Restart cushion time
MC3 ON
OFF
PWS
Phase difference
ON
OFF
ON
OFF
MC2 ON
OFF
C
Commercial
power supply
operation
INV
operation
A
1 s
A B C D
Pr.1383 5
5 Hz
Frequency command Output frequency
Commercial power supply frequency Pr.159
INV operation Bypass operation Coasting INV operationCoasting
Phase-synchronized bypass switching function
20 FUNCTION
Operating overview Operation flowchart
Parameter setting Operating procedure (for a magnetic contactor with delay time of 150 ms from closed state to open state)
1 Set the values specified on the rating plate of the FR-A8VPB in Pr.1344 and Pr.1345.
After the setting has completed, reset the inverter. (Refer to page 16.)
2 Set the sum of the frequencies of the commercial power supply and 5 Hz in Pr.1.
3 Set Pr.135 to "1" (open collector output terminals of inverter).
4 Set Pr.1382 to 150 ms (refer to page 22).
5 Set Pr.137 to 0.5 s.
Set a value equal to or more than the time period from when the MC3 signal turns ON until when the inverter and
the motor are electrically connected. If the set time is not longer than necessary, the inverter restart may not
function properly.)
6 Set Pr.57 to 0.5 s.
Be sure to set the appropriate value in this parameter as the setting is necessary to switch from the commercial
power supply operation to the inverter operation.
7 Set Pr.58 to 0.5 s.
Power supply ON
Setting the parameters
Start inverter operation
Constant-speed commercial
power supply operation
Deceleration (stop)
inverter operation
Phase-synchronized bypass switching function
FUNCTION 21
3
Signal status when setting parameters as shown in page 20
- When automatic bypass switching disabled (Pr.139 = "9999")
- When automatic bypass switching enabled (Pr.139 = "8888", Pr.159 "9999")
Motor status Input signal Output signal
Remarks MRS CS STF PWS MC1 MC2 MC3 LSYN
Power ON OFF OFF OFF OFF OFF ON
OFF OFF ON
OFF External operation mode
Beginning of operation (Inverter operation)
OFF ON
OFF ON
OFF ON
OFF ON
ON OFF ON OFF
Phase synchronization completed (Inverter operation)
ON ON ON ON ON OFF ON OFF ON
Constant-speed operation (Commercial power supply operation)
ON ON OFF
ON ON ON OFF ON
ON OFF
ON OFF
MC2 turns ON after MC3 turns OFF (motor is coasting during MC switchover). Start waiting time: 0.15 s
Switching to inverter operation due to deceleration (Inverter operation)
ON OFF ON
ON ON ON ON OFF
OFF ON
OFF
MC3 turns ON after MC2 turns OFF (motor is coasting during MC switchover). Start waiting time: 1.65 s
End of operation ON ON ON OFF
ON ON OFF ON OFF
Motor status Input signal Output signal
Remarks MRS CS STF PWS MC1 MC2 MC3 LSYN
Power ON OFF OFF OFF OFF OFF ON
OFF OFF ON
OFF External operation mode
Beginning of operation (Inverter operation)
OFF ON
OFF ON
OFF ON
OFF ON
ON OFF ON OFF
Phase synchronization completed (Inverter operation)
ON ON ON ON ON OFF ON OFF
Constant-speed operation (Commercial power supply operation)
ON ON ON ON ON OFF ON
ON OFF
OFF
MC2 turns ON after MC3 turns OFF (motor is coasting during MC switchover). Start waiting time: 0.15 s
Switching to inverter operation due to deceleration (Inverter operation)
ON ON ON ON OFF
ON ON OFF
OFF ON
OFF
MC3 turns ON after MC2 turns OFF (motor is coasting during MC switchover). Start waiting time: 1.65 s
End of operation ON ON ON OFF
OFF ON OFF ON OFF
Phase-synchronized bypass switching function
22 FUNCTION
Adjustment method (Pr.1382, Pr.1383, Pr.1384) Use a storage type meter for setting of the following items and parameters.
(1) Adjustment of MC switchover interlock time (Pr.1382 MC switchover interlock time (for phase-synchronized bypass
switching function))
Check the specification of magnetic contactors you use as MC2 and MC3 for delay time from closed state to open state,
and set the time (switchover interlock time between MC2 and MC3) in Pr.1382. To minimize the interlock time, measure the
actual delay time of MC2 and MC3 with the meter. Set the shortest possible time calculated from the measurement results
in Pr.1382.
(2) P