TWERD Power Electronics MFC710 400V Series User manual

TWERD Power Electronics
TWERD
®
Vector controlled frequency converter
MFC710 400V
MFC710 500V
MFC710 690V
type
with OP-11 control panel
User Manual
Edition 7.3
www.twerd.pl

Vector controlled frequency converter
MFC710 400V
MFC710 500V
MFC710 690V
type
with OP-11 control panel
User Manual
Edition 7.3

ontents
Contents
Technical data....................................................................................................................................................................... 7
Installation figures......................................................................................................................................................... 10
1. onditions of safe operation........................................................................................................................................... 12
1.1 Warnings................................................................................................................................................................. 12
1.2 Basic rules...............................................................................................................................................................12
1.3. Operation list.......................................................................................................................................................... 13
1.4. Environmental conditions.......................................................................................................................................13
1.5. Recycle................................................................................................................................................................... 13
1.7. E marking............................................................................................................................................................. 14
2. Installation of the frequency converter............................................................................................................................15
2.1. onnection of a power circuits...............................................................................................................................15
2.1.1. Safety rules.................................................................................................................................................... 16
2.1.2. Electromagnetic compatibility (EM ) rules....................................................................................................16
2.2. onnection of control circuits.................................................................................................................................18
3. ontrol panel OP-11....................................................................................................................................................... 20
3.1. General description................................................................................................................................................ 20
3.2. Basic view.............................................................................................................................................................. 21
3.3. Review and change of parameters values.............................................................................................................22
3.3.1. Parameters overview..................................................................................................................................... 22
3.3.2. hanging parameters settings......................................................................................................................23
3.4. hanging the values displayed in the basic view..................................................................................................24
3.5. opying of parameters settings between drives....................................................................................................24
3.6. Full pointers............................................................................................................................................................24
3.7. Restore factory settings......................................................................................................................................... 24
3.8. hanging the rotational speed of the motor (output frequency) from the control panel........................................25
3.9. PD access levels and parameters locks................................................................................................................25
3.9.1. PD access levels...........................................................................................................................................25
3.9.2. Parameters locks........................................................................................................................................... 26
3.9.3. hange of access codes...............................................................................................................................26
4. onfiguration of the frequency converter........................................................................................................................27
4.1. Setting nominal parameters of the motor...............................................................................................................27
4.1.1. Preparation for operation in a vector control mode.......................................................................................27
4.2. ontrol.................................................................................................................................................................... 27
4.2.1. Structure of control........................................................................................................................................27
4.2.2. ontrol from the control panel.......................................................................................................................30
4.2.3. ontrol from terminal connections.................................................................................................................30
4.2.4. Work with constant speeds...........................................................................................................................31
4.2.5. Motopotentiometer......................................................................................................................................... 32
4.2.6. Other possibilities of the frequency converter control...................................................................................32
4.2.7. onfiguration of digital and analog inputs and outputs.................................................................................33
4.3. onfiguration of the drive.......................................................................................................................................36
4.3.1. Establishing dynamic characteristics and ways of stopping the motor.........................................................36
4.3.2. Formation of U/f characteristic......................................................................................................................36
4.3.3. Elimination of frequencies.............................................................................................................................37
4.3.4. D (direct current) braking............................................................................................................................37
4.3.5. Mechanical brake..........................................................................................................................................37
4.3.6. Flying start..................................................................................................................................................... 38
4.4. Protection and blocking..........................................................................................................................................38
4.4.1. urrent, frequency and the torque limitations...............................................................................................38
4.4.2. Blocking a direction of electric motor rotation...............................................................................................38
4.4.3. Blocking the drive operation..........................................................................................................................38
4.4.4. Thermal protections of the motor...................................................................................................................39
4.4.5. Autostart blockade......................................................................................................................................... 41
4.5. Motor drying function..............................................................................................................................................42
5. The first start................................................................................................................................................................... 44
5.1. Vector control mode. Identification run.................................................................................................................. 44
5.1.1. Stages of identification run............................................................................................................................44
5.1.2. Switching on identification run....................................................................................................................... 44
5.2. Storing and reading of options for 4 different motors.............................................................................................45
6. Failures and warnings..................................................................................................................................................... 46
6.1. Messages on failures and warnings on the control panel......................................................................................46
6.2. Deleting failure message. Automatic restarts........................................................................................................46
6.2.1. Manual deleting.............................................................................................................................................46
6.2.2. Deleting through a digital input of the converter............................................................................................46
6.2.3. Remote deleting through RS link................................................................................................................... 46
6.2.4. Readiness to restart if the reason of failure has not disappeared.................................................................46
6.2.5. Automatic restarts.......................................................................................................................................... 47
6.3. odes of failures and warnings..............................................................................................................................47
6.4. Failure and warning log..........................................................................................................................................49
Frequency converter MF 710 type. TWERD Power Electronics 5

ontents
7. Sets of factory parameters.............................................................................................................................................. 50
8. PID controller.................................................................................................................................................................. 51
8.1. Turning on and a configuration of the PID controller.............................................................................................51
8.2. Limitation of saturation and SLEEP function..........................................................................................................52
9. Reeler calculator............................................................................................................................................................. 52
9.1. Turning on and configuration of R .......................................................................................................................53
10. Pump Group ontroller................................................................................................................................................. 53
10.1. Parameters of a pump group controller................................................................................................................54
10.2. Turning on pump group controller........................................................................................................................54
10.3. An operating mode with the PID controller and a mode of direct control.............................................................55
10.4. A configuration of pump amount and operating modes of separate pumps - blocking of pumps........................55
10.5. Monitoring work of pumps....................................................................................................................................55
10.6. onditions of switching on/off additional pump....................................................................................................56
10.6.1. Priority of switching on/off additional pumps...............................................................................................56
10.7. Automatic replacement of pumps.........................................................................................................................57
11. Advanced programming of MF 710............................................................................................................................. 58
11.1. haracteristic Points (P H)................................................................................................................................. 58
11.2. P H and the pointers – how does it work............................................................................................................58
11.3. Modification of standard control...........................................................................................................................58
11.4. The control panel – defining displayed values.....................................................................................................59
11.5. The control panel - definition of user referencing-units........................................................................................59
11.6. System of rotation counter................................................................................................................................... 60
12. PL controller............................................................................................................................................................... 61
12.1. Universal functional blocks...................................................................................................................................61
12.2. Sequencer device................................................................................................................................................ 62
12.3. Multiplexers MUX1 and MUX2.............................................................................................................................62
12.4. urve shaping unit............................................................................................................................................... 63
12.5. onstant values.................................................................................................................................................... 63
12.6. Example of PL use............................................................................................................................................. 64
13. ontrol of the frequency converter by means of connection RS..................................................................................65
13.1. Parameters which concern communication through RS......................................................................................65
13.2. Map of registers accessible through RS link........................................................................................................65
13.3. Handling of connection errors..............................................................................................................................67
14. Maintenance................................................................................................................................................................. 67
Appendix A – Table of haracteristic Points......................................................................................................................68
Appendix B - Table of Functions of Universal Blocks......................................................................................................... 73
Appendix – Table of MF 710 frequency converter's parameters...................................................................................77
GROUP 1 – ONFIGURATION OF THE DRIVE..........................................................................................................78
GROUP 2 – REFEREN ING-UNITS AND ONTROL.................................................................................................82
GROUP 3 – FAILURES................................................................................................................................................. 87
GROUP 4 – PARAMETERS BLO KING, ONFIGURATION OF: RS, DISPLAYING AND USER REFEREN ING-
UNITS............................................................................................................................................................................ 90
GROUP 5 – PUMP GROUP ONTROLLER, BLO KS OF PL ONTROLLER........................................................92
GROUP 6 – PL ONTROLLER – UNIVERSAL BLO KS..........................................................................................95
Appendix D – EU declaration of conformity........................................................................................................................ 96
6Frequency converter MF 710 type with OP-11 control panel. TWERD Power Electronics

Technical data
Technical data
This User's manual refers to frequency converters MF 710 type. These frequency converters are made in three
different variants of the supply voltage: 3x400V (typical), 3x500V (optional) and 3x690V (optional). Table 0.1 shows the
technical data common to the series of frequency converters MF 710.
Table 0.1 – Technical data common for frequency converters of the MF 710 series
Powe supply Voltage Uin / freq.
Three-phase power: 400V or 500V*) or 690V*) (-15% +10%), 45 ... 66Hz
*) depending on the type of ordered frequency converter; information on the supply
voltage is also placed on the nameplate
Output
Output voltage / freq.
Frequency resolution
0 ... Uin [V] / 0,0 ... 400,0 Hz (0,0 … 200,0 in Vector operation mode)
0,1Hz; 1 rpm (vector operation mode)
Efficiency MF 710: up to 97% at nom. power. MF 710/AcR: up to 96% at nom. power.
Cont ol system
Modulator SVPWM
Operation mode
U/f (linear, square-law),
Vector DT -SVM without sensor
Vector DT -SVM with sensor of the rotor position
Switching frequency 2 ... 15kHz, also random carrier
Rotation speed setting
Analog inputs, control panel, motopotentiometer, PID controller, communication unit
RS-232 or RS-485 port and other possibilities.
Resolution of 0.1 % for analog inputs or 0.1Hz / 1 rpm for the control panel and RS
Cont ol
inputs/outputs
Analog inputs
3 analog inputs:
AI0: voltage mode 0(2)..10V, Rin ≥ 200kΩ
AI1,AI2: voltage mode 0(2)..10V, Rin ≥ 100kΩ; current mode 0(4)..20mA, Rin = 250Ω
Operation mode and polarity are chosen by parameters and switches.
Accuracy: 0.5 % of the full range.
Digital inputs 6 digital galvanic separated inputs 0/(15..24)V, Rin ≥ 3kΩ
Analog outputs 2 outputs 0(2)..10V / 0(4)..20mA – configuration by parameters and switches,
accuracy 0.5 %
Digital outputs
3 relays K1, K2 and K3 – breaking capacity: 250V/1A A , 24V/1A D ,
1 transistor open-collector output 100mA/24V.
Fully programmable signal source.
Encoder interface Possibility of direct connection of incremental encoder: 5VD , line driver (RS422),
<250kHz. Recommended pulse rate: 1024 ÷ 2048.
Communication
onnectors RS-232, RS-485 with optoisolation
ommunication protocol MODBUS RTU. Function 3 (Read Register); Function 6 (Write Register).
Transmission speed 9600, 19200, 38400 or 57600 bit/s
Application Remote operation control and programming of all the parameters.
Special
functions
PID controller
hoice of referencing-unit signal source and feedback signal source, the possibility
of negating the error signal, SLEEP function and resetting the output to STOP,
limiting the output value.
PL controller
The possibility of taking control over converter's operation, START / STOP system,
direction of rotation and frequency, the possibility of controlling any external process
without connecting an external PL controller.
48 universal functional blocks, 43 functions: simple logic and arithmetic blocks;
block of 8-state sequencer, 2 multiplexers with 8 inputs, curve shaping unit, the
maximum execution time of the PL program: 10ms.
Pump group controller
Up to 5 pumps in a cascade.
The operation controlled by the PID controller or by direct reference.
Each pump can be programmed individually for operation from a frequency
converter or from the mains.
The possibility of pump blocking.
Automatic replacement of the pump after a preset time of operation.
Set of Predefined (Factory)
Parameters
There are 9 available set of predefined parameters:
- Local: control from keyboard,
- Remote: control through digital or analog inputs,
- Local/Remote: choice between local and remote,
- PID: speed regulated by PID controller,
- Motopotentiometer: control with “increase/decrease” signals from digital inputs,
- onstant frequencies: operation with constant frequencies, switching through
digital inputs
- Torque regulation: setting the torque by signal from digital input, vector control
- Pumps: the control of pump group
- Reeler: setting the torque with the reel calculator, vector control
Additional functions of the
panel
Definition of User's values for direct observation of the process variables: selection
of a unit of measurement, scale and data source (e.g. from PL controller)
Definition of User's referencing-device for direct changing of the process variables –
selection of a unit of measurement and scale.
opying parameter settings between F (frequency converters)
Frequency converter MF 710 type with OP-11 control panel. TWERD Power Electronics 7

Technical data
P otections
Short-circuit Short-circuit on unit output
Overcurrent Instantaneous value 3.5 In;; effective value 2.5 In
Overvoltage A /D
MF 710 400V: 1,43 Uin (Uin = 400V) A ; 750V D
MF 710 500V: 1,32 Uin (Uin = 500V) A ; 900V D
MF 710 690V: 1,28 Uin (Uin = 690V) A ; 1200V D
Undervoltage 0.65 Uin
Thermal: device Heat sink temperature sensor
Thermal: motor I2t limit, motor temperature sensor (PT type)
Supervision of
communication with control
panel
Established permissible time of connection absence
Supervision of
communication through RS
Established permissible time of connection absence
ontrol of analog inputs heck of absence of “living null” in modes 2... 10V and 4... 20mA
ontrol of a load symmetry E.g. a break in one of the motor phases
Underload Protection from operating without any load
Stall Protection against the stall of a motor
Table 0.2a – Technical data of frequency converters of the MFC710 400V series, depending on a type
The type of f equency
conve te
Constant-to que load
(max. ove load 1.5)
PN [kW] IN [A]
Va iable-to que load
(max. ove load 1.11))
PN2 [kW] IN2 [A]
Ip [A] Iz [A]
MF 710/0.37kW
0.37
1.5
0.55
2.0
2.25
6.3
MF 710/0.55kW
0.55
2.0
0.75
2.5
3.0
6.3
MF 710/0.75kW
0.75
2.5
1.1
3.5
3.75
6.3
MF 710/1.1kW
1.1
3.5
1.5
4.0
5.25
6.3
MF 710/1.5kW
1.5
4.5
2.2
5.5
6.0
6.3
MF 710/2.2kW
2.2
5.5
3
7.8
8.3
10
MF 710/3kW
3
7.8
4
9.5
11.7
10
MF 710/4kW
4
9.5 2)
4
9.5
15.8
16
MF 710/5.5kW
5.5
12
7.5
16
18
20
MF 710/7.5kW
7,5
17
11
23
25
25
MF 710/11kW
11
24
15
29
36
30
MF 710/15kW
15
30
18
37
45
50
MF 710/18.5kW
18.5
39 2)
18.5
39
60
59
MF 710/22kW
22
45
30
60
68
63
MF 710/30kW
30
60
37
75
90
80
MF 710/37kW
37
75
45
90
112
100
MF 710/45kW
45
90
55
110
135
125
MF 710/55kW
55
110
75
150
165
160
MF 710/75kW
75
150
90
180
225
200
MF 710/90kW
90
180
110
210
270
225
MF 710/110kW
110
210
132
250
315
315
MF 710/132kW
132
250
160
310
375
315
MF 710/160kW
160
310
180
375
465
400
MF 710/200kW
200
375
250
465
570
500
MF 710/250kW
250
465 2)
250
465
690
630
MF 710/315kW
315
585
355
650
850
800
MF 710/355kW
355
650
400
730
940
800
MF 710/400kW
400
730 2)
400
730
1100
800
MF 710/450kW
450
820
500
910
1190
1000
MF 710/500kW
500
910
560
1020
1365
1250
1) For ambient temperature < 35 0
2) The permissible overload is lower and amounts to 1,1 In
8Frequency converter MF 710 type. TWERD Power Electronics

Technical data
Table 0.2b – Technical data of frequency converters of the MFC710 500V series, depending on a type
The type
MFC710/500/...
Constant-to que load
(max. ove load 1.5)
PN [kW] IN [A]
Va iable-to que load
(max. ove load 1.11))
PN2 [kW] IN2 [A]
Ip
[A]
Iz
[A]
0,37kW 0,37 1,2 0,55 1,6 1,8 6,3
0,55kW 0,55 1,6 0,75 2,0 2,4 6,3
0,75kW 0,75 2,0 1,1 2,8 3,0 6,3
1,1kW 1,1 2,8 1,5 3,6 4,2 6,3
1,5kW 1,5 3,6 2,2 4,4 5,4 6,3
2,2kW 2,2 4,4 3 6,0 6,6 10
3,0kW 3 6,3 4 8,0 9,5 10
4,0kW 4 8,0 2) 4 8,0 12 16
5,5kW 5,5 10 7,5 14 15 20
7,5kW 7,5 14 11 20 21 25
11kW 11 20 15 24 30 30
15kW 15 24 18 32 36 50
18.5kW 18,5 32 2) 18,5 32 48 59
22kW 22 37 30 50 56 63
30kW 30 50 37 60 75 80
37kW 37 60 45 72 90 100
45kW 45 72 55 90 108 125
55kW 55 90 75 120 135 160
75kW 75 120 90 150 180 200
90kW 90 150 110 180 225 225
110kW 110 180 132 200 270 315
132kW 132 200 160 250 300 315
160kW 160 250 180 300 375 400
200kW 200 300 250 380 450 500
250kW 250 380 250 475 570 630
315kW 315 475 355 520 713 800
355kW 355 520 400 584 780 800
400kW 400 584 450 656 876 900
450kW 450 656 500 728 984 1000
500kW 500 728 560 816 1092 1250
560kW 560 816 630 900 1224 1250
1) For ambient temperature < 35 0.
2) The permissible overload is lower and amounts to 1,1 In.
PN – nominal output power when the maximum overload current Ip is about 1.5 IN (constant-torque load).
IN – nominal output current at PN.
PN2 – nominal output power when the maximum overload current Ip is about 1.1 IN2 (pumps, fans).
IN2 – nominal output current at PN2.
IP – overload current: 60 seconds every 10 minutes.
IZ – maximum nominal current of the protection.
Frequency converter MF 710 type with OP-11 control panel. TWERD Power Electronics 9

Technical data
Table 0.2c – Technical data of frequency converters of the MFC710 690V series, depending on a type
The type
MFC710/690/...
Constant-to que load
(max. ove load 1.5)
PN [kW] IN [A]
Va iable-to que load
(max. ove load 1.11))
PN2 [kW] IN2 [A]
Ip
[A]
15kW 15 18 18 21 26
18,5kW 18 23 22 26 35
22kW 22 26 30 35 39
30kW 30 36 37 43 52
37kW 37 43 45 52 65
45kW 45 52 55 64 78
55kW 55 64 75 87 95
75kW 75 87 90 104 130
90kW 90 104 110 121 156
110kW 110 121 132 144 182
132kW 132 144 160 179 217
160kW 160 179 180 219 268
180kW 180 202 200 242 300
200kW 200 219 250 266 329
250kW 250 266 315 329 398
315kW 315 329 355 393 491
355kW 355 375 400 420 530
400kW 400 2) 400 420 530
500kW 500 2) 500 500 550
560kW 560 2) 560 560 615
630kW 630 2) 630 650 715
800kW 800 2) 800 800 920
1) For ambient temperature < 35 0.
2) For frequency converters at nominal power 400 kW and above, the range of overload is determined in
consultation with the ustomer.
PN – nominal output power when the maximum overload current Ip is about 1.5 IN (constant-torque load).
IN – nominal output current at PN.
PN2 – nominal output power when the maximum overload current Ip is about 1.1 IN2 (pumps, fans).
IN2 – nominal output current at PN2.
IP – overload current: 60 seconds every 10 minutes.
Installation figu es
The dimensions of frequency converter, type MF 710.
Enclosu e type A Enclosu e type B F ee space a ound
the conve te
It is necessary to provide some free space around the converter for appropriate air circulation.
10 Frequency converter MF 710 type. TWERD Power Electronics
b
B
C
A
a
b
B
A
a
Ø1
Ø2
Ø1
d1
φ
Ø2
d2

Technical data
Table 0.3a - Mechanical dimensions of the frequency converters MFC710 400V and MFC710 500V type
Modification
The type of
converter:
MFC710/...
MFC710/500/...
Di ensions
[ ]
a A b B C d1 d2 Ø1 Ø2 φ
Weight 1)
[kg]
A
0,37 kW
0,55 kW
0,75 kW
1,1 kW
1,5 kW
2,2 kW
3,0 kW
4,0 kW
255 267 75 114 154 - - 7 7 -
3,0
3,0
3,0
3,0
3,0
3,1
3,1
3,1
5,5 kW
7,5 kW 322 337 90 130 188 - - 7 7 - 5,6 5,8
11 kW
15 kW
18,5 kW 2)
322 337 90 130 223 - - 7 7 -
7,2
7,4
7,5
B
22 kW 434 450 160 220 225 6 10 7 7 11 19,0
30 kW
37 kW 585 600 180 225 247 8 8 7 7 14 24 24
45 kW 2)
55 kW 2)
75 kW 2)
590 615 192 256 266 10 15 8,2 8,2 15
28
29
30
90 kW 5)
110 kW 5)
838
(927)
865
(955)
190
(370)
283
(434)
400
(272)
12
(14)
15
(9,5)
8,5
(9,4)
8,5
(9)
18
(18,2)
60
60
132 kW 2)
160 kW 2)
180 kW 2)
200 kW 2)
250 kW 2)
875 920 338 460 345 15 25 13 13 22
707) (88)
707) (88)
727) (90)
747) (92)
757) (93)
315 kW 2)
355 kW 2)
400 kW 2)
875 920
9403)
420
5584) 640 345 15 25 13 13 22
125
125
130
450 kW 2)
500 kW 2) 1045 1090
1127 3) 2x317 800 345 15 25 13 13 22 190
190
Table 0.3b - Mechanical dimensions of the frequency converters MFC710 690V type
Modification The type of converter 6):
MFC710/690/...
Di ensions
[ ]
a A b B C d1 d2 Ø1 Ø2 φ
Weight 1)
[kg]
B
75 kW 5)
90 kW 5)
110 kW 5)
132 kW 5)
838
(927)
865
(955)
190
(370)
283
(434)
400
(272)
12
(14)
15
(9,5)
8,5
(9,4)
8,5
(9)
18
(18,2)
65
65
65
65
160 kW
200 kW
250 kW
315 kW
875 920 338 460 345 15 25 13 13 22
90
90
95
95
355 kW
400 kW
450 kW
500 kW
875 920
9403)
420
5584) 640 345 15 25 13 13 22
125
125
130
130
560 kW
630 kW
800 kW
1045 1090
11273) 2x317 800 345 15 25 13 13 22
200
200
200
1) Approximate weight of the frequency converter, may vary depending on the construction.
2) Version launched in 2012.
3) Height of the frequency converter increased due to the power terminals blocks.
4) Bottom mounting hole spacing.
5) Version launched in 2013, the previous dimensions are in brackets.
6) For units of smaller power ratings (< 75 kW), casings are chosen according to the individual requirements.
7) Applies to converters from June 2022, previous weight is given in brackets.
We also offer a frequency converters built in electric cabinets at different IP protection levels.
The IP protection class is given in chapter 2.1.1.e.
Frequency converter MF 710 type with OP-11 control panel. TWERD Power Electronics 11

1. onditions of safe operation
1. Conditions of safe ope ation
This manual contains notices intended to ensure personal safety, as well as to protect the products
and connected equipment against damage so read it carefully before using the drive.
Not knowing or ignorance of the information contained in it can cause physical injury, death or
damage to the frequency converter and connected equipment.
In the further part of this User manual, the frequency converter, to which this instruction applies, will
be also referred to as the F , drive or converter.
1.1 Wa nings
Incorrect installation, usage, and maintenance of the drive can cause physical injury, death, or damage to the
device and connected equipment.
R I S K O F E L E C T R I C S H O C K !
The dange ous voltage is still p esent afte
disconnecting the powe supply
•Installation, usage, and maintenance of the drive must be performed only by qualified personnel.
•Before switching on the voltage, make sure the drive has been correctly installed and all housing elements have
been properly assembled.
•It is forbidden to touch the drive's voltage terminals if it is connected to the power supply.
•After connecting the drive to the supply voltage, its internal components (without the control terminals) are on the
power supply potential. Touching these components can cause an electric shock.
•When the drive is connected to the supply voltage, dangerous voltage appears at its output terminals U, V, W even
when the motor is not running.
•Externally supplied control circuits may carry dangerous voltage even when the input power of the frequency
converter is switched off.
•The drive contains D link circuit capacitors that remain charged even when the drive is not powered. It can cause
an electric shock. The time required for self-discharge of capacitors in an undamaged drive is usually between
5÷15 minutes (a higher power rating of the frequency converter means the longer time).
Before starting any installation works, wait at least 5 minutes after disconnecting all power supplies sources and
make sure that voltage on clamps is not present.
CAUTION! The lack of voltage at the connection te minals is not synonymous with the lack of dange ous
voltage in the inte nal DC ci cuit of a d ive.
•Don’t make any connections changes when the drive is connected to the power supply.
•Do not install and use the frequency converter in flammable or explosive atmosphere because it could cause fire or
explosion.
1.2 Basic ules
•Don’t connect mains voltage to output terminals U, V, W.
•Don’t measure the voltage endurance of any unit drives.
•To measure the cables insulation it is necessary to disconnect them from the drive.
•Do not repair the unit yourself. Any repairs must be performed only by authorized service.
Any modifications or self-repairs of the drive can cause physical injury or death, or damage to the drive and
connected equipment. Any attempt at unauthorised repairs will void any warranty.
•Don’t touch integrated circuits and any other parts on the drive’s electronic board, as they can be damaged by
electrostatic discharge.
•Don't connect any capacitors to motor wires (e.g. intended for improvement of power factor).
•Don't measure output voltage of converter using digital voltmeters without low-pass filter. The voltage can be
measured correctly using an electromagnetic voltmeter.
•The drive is not designed to operate with periodically switched on/off supply voltage. After turn off supply voltage
wait 5 minutes before turn on it again.
•If the electric motor runs at low speed (below 25 Hz), additional cooling of the motor is necessary.
12 Frequency converter MF 710 type. TWERD Power Electronics

1. onditions of safe operation
1.3. Ope ation list
The operations applied at installation and the first start-up of the drive
1 After unpacking the converter, it is necessary to check up visually the presence of damages which could arise during
transport.
2 heck up the correspondence between the delivered frequency converter and the order - check up the ratings plate on the
case. Delivery includes:
•the frequency converter with the User Manual,
•a choke – if it was ordered, recommended for rated power 5.5 kW and above,
•a ferrite ring or RFI filter - depending on the order.
3 heck up the correspondence between the conditions in which the converter will be used and conditions of an environment
for which it is designed (section 1.4).
4 Installation of the frequency converter should be made due to the principles of safety and EM rules, listed in section 2.
5 Perform the configuration of the converter in accordance with the chapters of this manual.
1.4. Envi onmental conditions
Deg ee of pollution
The second degree of pollution has been assumed during the design, at which there are normally only non-
conducting pollution. However, there is a probability of temporary conductivity caused by a condensation, when the
converter is disconnected from the voltage source.
In case the environment in which the frequency converter will work contains pollution, which can influence its
safety, it is necessary to apply appropriate counteraction, using, for example, additional cases, air channels, filters etc.
Climatic conditions
Installation site During warehousing During transport
Temperature from -10° to +55° 1from -25° to +55° from -25° to +70°
Protective packing
Relative humidity
from 5% to 95% from 5% to 95% Max 95%
Short-term, insignificant condensation on the external side of the converter case is permitted only
when the converter is disconnected from the voltage source.
Air pressure from 86 kPа to 106 kPа from 86 kPa to 106 kPa from 70 kPa tо 106 kPa
1.5. Recycle
Equipment containing electrical and electronic components can not be removed into municipal
waste containers. Such equipment must be separated from other wastes and attached to electrical and
electronic waste in accordance with applicable local regulations.
This way you help to prevent uncontrolled waste disposal and promote the recycling of materials.
1.6. Limits of esponsibility
Despite all the efforts and due diligence of TWERD Power Electronics does not guarantee that the published
data is error-free.
The User is obliged to read the information contained in this Manual before using the device. The TWERD Power
Electronics ompany is not responsible for any consequences of incorrect use of information contained in this Manual
or any infringement of patents or other rights of third parties that may arise from their use.
TWERD Power Electronics products are not authorized for use as critical components in life support devices or
systems without the written consent of TWERD Power Electronics. Furthermore, TWERD Power Electronics are not
responsible for any damages resulting from the use of converters outside its intended purpose.
The information contained in this manual is subject to change without notice, and it supersedes and supplements
the information previously provided.
TWERD logo is a trademark of TWERD Power Electronics. All trademarks used are the property of their
respective owners.
For more information contact out technical support at: [e-mail]
1) For nominal load temperature 40o was assumed; however, for lower loads higher temperatures are acceptable.
Frequency converter MF 710 type with OP-11 control panel. TWERD Power Electronics 13

1. onditions of safe operation
1.7. CE ma king
Frequency converters of MF 710 fulfill the fundamental requirements of following instructions of the new
approach:
•the Instruction low-voltage LVD 2014/35/EU,
•the Instruction EM 2014/30/EU.
Mentioned above instructions are fulfilled only after installation of the frequency converter and configuration of
the drive according to the instructions of installation principles and the principles of safety resulted below. User is
obliged to fulfill these requirements.
The Declaration of onformity is in the end of this User’s manual.
Safety
IE /EN 50178:2003 Electronic products which are used in installations of the high power.
IE /EN 61800-5-1:2007+A1:2017 Adjustable speed electrical power drive systems — Part 5-1: Safety requirements —
Electrical, thermal and energy.
Elect omagnetic compatibility
IE /EN 61800-3:2008+A1:2012 Electric power drives with regulated speed. Electromagnetic compatibility (EM ) in
consideration of special methods of research
onducted emission
IE /EN 61800-3:2008 first environment IE /EN 61800-3:2008 second environment
Class C1
The drive up to 18.5kW
inclusive with the use of
assembly principles (section
2.1.2) and EM equipment
(Section 2.1.2 without the
item f.5).
Class C2
The drive up to 18.5kW inclusive
with the use of assembly
principles (section 2.1.2) and
EM equipment (Section 2.1.2
without items f.4 and f.5).
Class C3
The drive with the power above 18.5 kW
with the use of assembly principles
(section 2.1.2) and the equipment (section
2.1.2 without items f.4 and f.5).
Radiation emission
IE /EN 61800-3:2008 first environment IE /EN 61800-3:2008 second environment
Class C2
The drive up to 18.5kW inclusive with the use of assembly
principles (section 2.1.2) and EM equipment (Section 2.1.2
without the item f.5).
Class C3
The drive with the power above 18.5 kW
with the use of assembly principles
(section 2.1.2) and the equipment (section
2.1.2 without items f.4 and f.5).
Resistance IIE /EN 61800-3:2008 first and second environments
The converter power up to 18.5 kW set up in the first environment without external RFI filter does not exceed the
emissions admissible for class 2, however, the limits of emission value valid for the class 1 can be exceeded.
Systems with the capacity up to 18.5 kW inclusive in a residential
environment may cause radio interference, and in this case, some
additional suppression measures may be necessary.
The above warning applies to systems that do not meet the requirements of class 1
In a converter with the power more than 18.5 kW, in which RFI filtering is not required to meet the emission
requirements for class 3, the possibility of radio interference may be expected.
Systems with the capacity more than 18,5 kW are not intended for use in
the public low-voltage network, which supplies residential units.
peration in such a network is expected to cause radio-frequency
interference.
The above warning applies to systems that do not meet the requirements of classes 1 and 2
The converters are not factory-configured for the use in IT-type networks because the asymmetric high-
frequency filters used in the converter (Y-type capacitors) reduce the noise emission, disrupt the concept of an isolated
distribution network from the ground. Additional grounded impedances can become safety threat in such systems.
Before buying the converter intended for use in the IT network, please contact us to arrange the individual
implementation of the system.
For technical reasons, in some applications (current > 400A or voltage  1000V ) fulfilling requirements of EM
is not possible. In such cases, a user and a manufacturer should decide on ways of satisfying EM requirements in the
particular application.
14 Frequency converter MF 710 type. TWERD Power Electronics

2. Installation of the frequency converter
2. Installation of the f equency conve te
2.1. Connection of a powe ci cuits
The frequency converters of the MF 710 type are electrical devices intended for control rotational speed of
asynchronous motors. This adjustment is made by changing the frequency and amplitude voltage at the output of the
converter.
The MF 710 converter is supplied from the three-phase network through terminals L1, L2, L3. In some implementations
there is a need to connect an auxiliary power supply intended to supply internal fans.
Fig. 2.1 shows a diagram of power circuits connections.
Fig. 2.1 - onnection of power circuits to MF 710 converter
The cross-sections of the cables and the type of the line choke should be selected depending on the load current.
The required fuses are shown in Table 0.2, the required cross-section values are presented in the table 2.1.
Table 2.1 - Long-term current load of copper wires with PV insulation in temperature +40o on the
example of the cable HELUKABEL TOPFLEX-EMV-3 PLUS-2YSL Y-J 600/1000 V
No.cores x
cross-sec.
[mm2]
Power ratings
with 3 loaded cores*)
[A]
No.cores x
cross-sec.
[mm2]
Power ratings
with 3 loaded cores*)
[A]
3x1,5 + 3G 0,25
15
3x50 + 3G 10
146
3x2,5 + 3G 0,5
22
3x70 + 3G 10
180
3x4 + 3G 0,75
29
3x95 + 3G 16
217
3x6 + 3G 1
38
3x120 + 3G 16
254
3x10 + 3G 1,5
53
3x150 + 3G 25
291
3x16 + 3G 2,5
71
3x185 + 3G 35
332
3x25 + 3G 4
93
3x240 + 3G 42,5
394
3x35 + 3G 6
117
3G — yellow-green PE protective conductor (PE protective conductor is divided into 3 conductors — figure 2.2)
*) Load capacity converted for ambient air temperature + 400 (coefficient of 0.87).
Frequency converter MF 710 type with OP-11 control panel. TWERD Power Electronics 15
Fig. 2.2 - HELUKABEL
TOPFLEX-EMV-3
PLUS-2YSL Y-J
600/1000 V
PE
PE
PE
MFC710
L1
L2
L3
+BR
(+D )2)
Dynamic braking resistor
(option)
Overcurrent
protection
Power switch
PE
L1
L2
L3
PE
U
V
W
PE
Shield cable recommended
- Do not use any contactors between
converter output and motor!
- Output voltage can be measured
correctly only with an electromagnetic
voltometer!
-BR
(BR)2)
ATTENTION! Shown circuit has terminals for
illustration only and does not show their actually
position on the drive
1) +BR(+D ), -BR(BR) connectors are only present in frequency converters ready to work with the breaking resistor
(this converters are equipped with breaking transistors - frequency converters at 18.5kW and below are equipped
as standard with breaking transistor, frequency converters at 22 kW and above are assembled in breaking
transistor optionally).
Attention: frequency converters also can have +D , -D connectors. These are connectors of
internal D circuit. Do not connect b eaking esisto to this connecto s!
2) Marks used for converters 22kW and above.
3) Need to connect the power supply of internal fans on frequency converters with additional terminals
(inverters: 30 kW and 37 kW, 45..75kW produced until May 2016, the others depending on the version).
4) A typical external supply voltage is 230V A . Optionally, it can be 3x400V A or other according to individual orders.
For this reason, depending on the version, there can be various power cords numbers and their markings.
5) For rated power 5.5 kW and above 3 phase choke is recommended.
6) Frequency converters 450kW and above have 6 input clamps and are prepared to work with 12-pulse input system.
7) In a high power inverters can occur D terminals: +M,+D. Depending on the individual settings, please connect a
choke, or do short-out by jumper.
1)
M
~
U
V
W
PE
L
N
6)
6)
6)
5)
Main powe supply
Auxilia y
powe supply 4)
L N
3)
+M
+D
7)

2. Installation of the frequency converter
The frequency converter is equipped with connection terminals, protected from corrosion, dedicated to make
appropriate connections. Additional information about external connections can be found in section 2.1.1 under the
“Equipotential connections” and in section 2.1.2. In order to comply with EU directives of electromagnetic compatibility
(EM ), application of a four-wire shielded cable (three phases + earth wire) is recommended to power the motor. The
type of line chokes and protections are available at the manufacturer's representative. Do not use any circuit breakers or
contactors on the output side of the converter that would disconnect the system during its operation - see section 2.3.
2.1.1. Safety ules
a. Equipotential connections
The protection against indirect touching live parts consists of automatic switching off by special short-circuit
protection (or differential-current protection) or voltage limitation to a level not exceeding acceptable values, in case of
an insulation failure.
The short circuit to ground at the frequency converter output can be not detected by short-circuit protection,
devices due to D -link circuit. The protection against phase-to-phase and phase-to-ground short-circuit on the output of
the converter is provided. However this protection is based on IGBT transistors blocking, what does not conform to the
requirements of fire-prevention protection. Due to that, for safety of staff, it is necessary to make local equipotential
connections.
In the frequency converter there are provided appropriate terminals, properly marked, protected from corrosion
to make equipotential connections.
b. P otection
The maximum values of input wire short-circuit protection are presented in the table 0.2. It is allowed to use gG
or aM fuses, however taking into account necessity of protection of the rectifier bridge of the frequency converter, the
best solution is gR or aR fuses. You can use overcurrent protection, but the response time of such devices is longer
than properly chosen fuse.
Frequency converter is protected from: drive overloading, motor overheating, under- and overvoltage in an D
link circuit of the converter, a short-circuit at the converter output (it protects converter only!).
The usage of differential-current protection due to electrical shock prevention can appear unfavourable since it
can trigger due to temporary or constant leakage current of the power drive system, working in normal conditions. In
case of usage of the differential-current protection devices you may use only circuit breakers of a B type, due to different
nature of a differential current.
c. Disconnecting device
In order to comply with EU directives, according to IE /EN 60204-1:2010, power drive, which consists of a
frequency converter and electrical machine should be supplied with a device for disconnecting power supply. This
device should be one of listed below:
•separator (with or without fuses), category of usage A -23B fulfilling the requirements EN 60947-3,
•disconnector (with fuses or without), disconnecting a load circuit before opening main contacts, conforming
the EN 60947-3 requirements,
•tripper conforming the EN 60947-2 requirements.
The installer is responsible for meeting this requirement.
d. Eme gency stop
In order to comply with EU directives and IE /EN 60204-1:2010 and for personnel safety and equipment, it is
necessary to use an emergency stop switch, which has higher priority than other functions, irrespective of operating
mode. The key STOP on operator panel cannot be treated as the switch of abnormal break, because it doesn't
disconnect a frequency converter from power supply. The installer is responsible for meeting the requirement.
e. Casing
ases of converters with a power 37 kW and below meet the requirements of the protection class IP20. The
housings of converters with a power of 45 kW and above have the protection class IP00. In case of individual
implementation, the degree of protection may be different. The surface, on which the operator's control panel is located,
meets the requirements of an IP40 protection degree. The casing has been designed so that it cannot be removed
without the use of tools.
f. C apacito s discha ging
In a D link circuit of a frequency converter there is a capacitor battery with relatively high capacity. After turning
off of a supply voltage in its clamps dangerous voltage is present for a certain time. It is necessary to wait for 5÷15
minutes (a higher power rating of the frequency converter means the longer time) before making connections on clamps
of power terminal strip of a frequency converter. Before starting any installation works make sure that a voltage on a
clamps is not present. The information about danger of such voltage is placed also on terminal strip cover.
2.1.2. Elect omagnetic compatibility (EMC) ules
The installation principles reducing EM problems are divided into four groups. You can achieve the full effect by
applying all the principles listed below. Not applying any of the rules undermines the effectiveness of the others:
•separation,
•equipotential bonding,
•shielding,
•filtration.
The basic way of connecting the filter, the frequency
converter and the motor is presented in the figure 2.3.
16 Frequency converter MF 710 type. TWERD Power Electronics
Fig. 2.3 - onnection of separate components of the
electric drive system

2. Installation of the frequency converter
a. Sepa ation
Power cables (supplying, motor's) must be separated from signal wires. It is necessary to avoid parallel leading
of power and signal wires in the common wire channels, and especially in group of cables. The crossing of power cables
and signal cables under a right angle is allowed.
b. Equipotential connections
The frequency converter and the filter should be mounted as close as possible, preferably on a common metal
plate which acts as a ground. For this purpose, for example, the back wall or a mounting plate of a case can be used.
The housing of the frequency converter, the filter and the metal plate shouldn't be coated with any insulation materials. It
is necessary to pay attention to an opportunity of oxidation of a surface that results in deterioration of contact. To limit
the level of asymmetric disturbances, a multipoint connection of the cable shield with ground is preferred.
Additional information about equipotential connections can be found in section 2.1.1.
c. Shielding
Wires between the mains filter and the frequency converter are not necessary for shielding, if their length doesn't
exceed 300mm. In case the length of conductors exceeds 300mm it is necessary to use the shielded wires. ompletely
shielded cable is a cable which fully complies with requirements of interference radiation according to EN 55011 norms.
Such cable should have the screen consisting of spiral metallized aluminium foil and tinned copper plait with a puls-duty
factor of not less than 85%, not separated galvanically.
onnection of the cable ends to ground is obligatory. It is necessary to use grounding of the cable shielding on
whole section of a cable, on both ends. For this purpose a special EM grommets are used. They provide valid contact
of cable shielding to the case of the equipment. In addition it is necessary to use special cable clips to connect it to back
wall of a case for example. It is necessary to pay attention that the unshielded cables, are as short as possible.
Junctions of the shielding with a ground should be free from insulating coat on a whole section. Be careful not to
damage the shielding. It is not recommended to weave the copper plait in one point (without using EM grommet) in
order to realize grounding.
In case of need control signal wires should also be shielded using the same principles.
d. F ilt ation
The use of the EM filter limits noises spreading from electric drive system to the mains. The principles of filter
installation are described at the description of equipotential bonding and shielding.
e. Fe ite ings
Fulfilling the requirements, concerning interference emission in the first
environment and limited distribution, can be realized by using of ferrite rings instead
of additional RFI filter (in converters with rated power 7.5kW and below). It is
necessary to remember the warning placed in section 1.7. “ E marking”.
The ferrite ring should be placed on a supply cable of the frequency
converter, as on the figure 2.4.
f. The list of the equipment educing EMC p oblems
The list contains devices that can be added to the drive system to improve
resistance to interference and reduce the emissivity of the drive system installed in
the intended environment of operation:
1) completely shielded cables - we recommend cables TOPFLEX EMV and TOPFLEX EMV 3 PLUS (HELUKABEL),
2) EM grommets (throttles),
3) ferrite rings,
4) RFI filter (EP OS, REO, S HAFFNER),
5) EM cabinet — optional, not required to comply with the EM instructions.
Fig. 2.5 - Installation principles reducing EM problems
Frequency converter MF 710 type with OP-11 control panel. TWERD Power Electronics 17
Fig. 2.4 – Installation of a ferrite
ring

2. Installation of the frequency converter
2.2. Connection of cont ol ci cuits
The figures below show the two variants of the control electronics board used in the MF 710 converters.
a. Frequency converters of rated power 18,5kW and below:
Fig. 2.6a - User terminal block and configuration switches of MF 710 converter. The control board variant for rated
power 18,5 kW and below.
b. Frequency converters of rated power 22kW and above:
Fig. 2.6b - User terminal block and configuration switches of MF 710 converter. The control board variant for rated
power 22 kW and above.
18 Frequency converter MF 710 type. TWERD Power Electronics
J5
J4J3
J1 J2
RS485
EN ODER
24V
AO1 AO2
DO4
24V
GND
K2K1 K3
-
AI1
+
AI1
DI1
DI2
DI3 DI4 DI5
DI6
-
AI2
+
AI2
GND
AI0
Uref
B A +5V 0V
1 2 3 4
0V
V
Z
Z
B
B
A
A
Use only incremental
encoders with the line
transmitter interface
and 5V type!
Terminal jumpers
of RS485 interface.
Put on J6, J7 if the
drive is the last one
on communication
bus.
Analog outputs operating mode
J1 for AO1
J2 for AO2
Analog inputs
operating mode
J3 for AI1
J4 for AI2
Operating mode of DI6
Voltage
mode
urrent
mode
Voltage
mode
urrent
mode
Digital input mode
Motor thermistor
mode
115
16 30
X3
X6
Digital outputs
DO1, DO2, DO3
(relays K1, K2, K3) Analog
outputs
AO1..AO2
Analog inputs
AI0..AI2
Digital inputs
DI1..DI6
Uref = 10V - for use with
analog inputs in voltage mode
J6
J7
Digital
output
DO4
J5
J4J3
J1 J2 J6
J7
X4
RS485
X6 EN ODER
24V AO1 AO2
GND
-
AI1
+
AI1
DI1 DI2 DI3 DI4
DI5 DI6
-
AI2
+AI2
GND
AI0 Uref
B
A
+5V
0V
0V
+5V
Z
Z
B
B
A
A
Analog outputs operating mode
J1 for AO2
J2 for AO1
Analog inputs
operating mode
J3 for AI2
J4 for AI1 Operating mode of DI6
Terminal jumpers of
RS485 interface.
Put on J6, J7 if the drive
is the last one on
communication bus.
Use only incremental
encoders with the line
transmitter interface
and 5V type!
Digital inputs
DI1..DI6
Voltage
mode
urrent
mode
Voltage
mode
urrent
mode
Digital input mode
Motor thermistor
mode
K1 K2 K3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
12
DO4 24V
Analog inputs
AI0..AI2
Analog outputs
AO1..AO2
Digital outputs DO1, DO2, DO3
(relays K1, K2, K3)
Uref = 10V - For use with analog
inputs in voltage mode
Digital
output
DO4

2. Installation of the frequency converter
Fig. 2.7 shows an exemplary configuration of control circuit connections, based on the example of a terminal strip
of converters with a power of up to 18.5kW inclusive.
Fig. 2.7 - Example configuration of frequency converter terminal connections for MF 710 18,5kW and below.
Uref = 10 Vdc, max 10 mA.
2.3. Using contacto s between the f equency conve te and the elect ic moto
If there is a need to use contactors between the drive and the electric motor, make sure to switch the contactor
in the voltageless state on the output terminals, when the drive is stopped (STOP status). Otherwise there is a high
probability of damaging the converter.
Attention: Just issuing the STOP command is not sufficient, because there is a possibility of programmatic
delay of the response to the STOP command (par. 1.34) and the possibility of setting a stop on a ramp (par. 1.64).
For this reason, in order to avoid damage to the converter, it is necessary to control the OPERATING status of
the converter (P H.61), e.g. by using one of the relays. The default setting of the K2 relay (par. 2.92, 2.93) is suitable
for this purpose.
Frequency converter MF 710 type with OP-11 control panel. TWERD Power Electronics 19
24V
AO1
AO2
DO4
24V
GND
K2K1 K3
-AI1
DI1 DI2 DI3 DI4 DI5 DI6
GND
AI0
Uref
Digital inputs
DI1...DI6
0V = logic „0”
24V = logic „1”
External relay control via DO4
Output type: open collector U
MAX
=24V,
I
MAX
=100mA
230V A
Relay outputs can be applicated to control
power supply of 230V devices.
K1, K2, K3 Relays
Potentiometer connected
to AI0 (operates in voltage
mode only)
AI1 in current
mode
0(4)...20mA
AO2 in current mode
0(4)...20mA R
L < 1kΩ
AO1 in voltage mode
0(2)...10V RL > 10kΩ
R
L
< 1kΩ
AI2 in voltage
mode
0(2)...10V
R
L
> 10kΩ
+AI1
-AI2
+AI2
250V/1A A
24V/1A D

3. ontrol panel OP-11
3. Cont ol panel OP-11
3.1. Gene al desc iption
The control panel (fig. 3.1) is used for:
•monitoring the motor current, voltage, torque, referencing and output frequency as well as other variables
available in the group "0 Preview";
•drive operation control: start, stop, change of the electric motor rotation direction, failure resetting;
•changing the settings of the drive: entering the motor's rated data, start the identification run, selecting the
place of control, etc.
The entered data is stored in the internal memory of the drive, and the control panel only mediates their reading /
writing. This makes it possible to replace panels between converters of the same type regardless of their rated power.
The control panel is removable and can also be mounted outside the drive enclosure, e.g. on the control cabinet door.
To do this, use a suitable cable available from the drive manufacturer.
An additional option of the control panel is the ability to copy parameter settings between the drives. See section "3.5.
opying of parameter settings between drives."
Parts of the control panel (fig. 3. 1 )
1
Display
2
Led indicators of drive state – see table 3.1
3
Keys: navigation keys „   ” „ ” „ ” „ ”, Enter
key „ ”, ES , additional Function key “F”
4
„Start left” and „start right” keys
Note: the electric motor rotation direction
depends on the order of the wire connections
at the terminals U,V,W.
5
„Stop/Reset” key
The navigation keys
3
are used to
navigate the menu of the drive and are always
active - pressing them causes a reaction regardless
of whether the control operation of the drive takes place from the control panel, through analog / digital inputs, or
otherwise.
Keys
4
and
5
and are used to control the operation of the drive ("start left", "start right", "stop") and are active
only when the control is set from the control panel - see table 3.2 and chapter 4.2.2 “ ontrol from the control panel”.
The "Stop / Reset" key is also used to delete the faults message – if it is pressed for more than 2 seconds.
Table 3.1 - Led indicators of F state
Led colou Lighting type Desc iption
Green „RUN” On Drive is working
Red „FAULT” On Drive is in the failure state – see chapter 6 “Failures and
warnings”.
Flashing Drive is in the warning state – see chapter 6 “Failures and
warnings”.
Yellow „READY” On Drive is in ready state
Off Drive is in the blocking state – see chapter 4.4.3
Red „FAULT”
Yellow „READY”
On
Flashing
Drive is in the failure state.
After removing the cause of the failure, the drive will continue
the work automatically.
20 Frequency converter MF 710 type. TWERD Power Electronics
Fig. 3.1 - OP-11 ontrol panel
Ulin
400 V
fzad
20.0
Hz
Isil
0.0
A
A LO LO
2
4
5
3
1