EMHEATER
EM8 Series Inverter User’s Manual
EMHEATER
User’s Manual
EM8 Series Frequency Inverter
China EM Technology Limited
Address :
Phone:
Fax:
Zip code:
Website :
No.80, Baomin 2 road, Xixiang, Bao'an District,Shenzhen ,China
86-0755-29985851
86-0755-29970305
518101
Http://www.emheater.com
China EM Technology Limited
EM8 User's Manual
Foreword
Foreword
Thanks for using EMHEATER EM8 series inverter.
EM8 series inverter is China EM Technology Limited adopted the new concept to research and developed
high-performance product; With unique control model, this inverter can realize high torque, high precision,
wide variable speed and low noise drive; With more superior performance than similar products, EM8
inverters have practical PID regulation, simple PLC, flexible input and output terminals, parameter online
modification, automatic identification signal transmission failure, parameter storage of power outages and
stop, fixed length control, swing frequency control, main and auxiliary given control, field bus control and
a series of practical operation, control function, which provide a highly integrated solution for equipment
manufacturers and terminal customers, in speed, energy saving, protection, automatic control and other
aspects. EM8 inverter has great value to reduce the purchase and operating costs, enhance the reliability of
customers’ system.
Before installation, use and maintenance of this inverter, the relevant personnel please read the user manual
carefully, to ensure the correct installation and operation of this product, make it play its best performance.
As for any query of frequency inverter application or having special requirements, you can feel free to
contact my company's agents, but also can directly call our company after sale service department; we will
make effort to service well for you.
This manual copyright belongs to China EM Technology Limited; please forgive without notice of revise.
Version:201302
EM8 User's Manual
Table of Contents
Table of Contents
1. Caution ........................................................................................................................................................ 1
1.1 Safety caution clause ......................................................................................................................... 1
1.1.1 To get the product's confirmation ........................................................................................... 1
1.1.2 Installation .............................................................................................................................. 1
1.1.3 Wiring ..................................................................................................................................... 1
1.1.4 Running, maintenance, inspection .......................................................................................... 1
1.2 Precaution of use ............................................................................................................................... 2
1.2.1 Motor insulation confirmation................................................................................................ 2
1.2.2 Negative torque load .............................................................................................................. 2
1.2.3 Mechanical resonance of load equipment .............................................................................. 2
1.2.4 The capacitor and piezoresistor of improving power factor of electricity .............................. 2
1.2.5 To drop down KW because of basic frequency setting........................................................... 2
1.2.6 Running upper 50Hz .............................................................................................................. 2
1.2.7 Electronic thermal protection of motor .................................................................................. 2
1.2.8 To drop down KW because of altitude ................................................................................... 2
1.2.9 About IP.................................................................................................................................. 3
1.3 End of life caution ............................................................................................................................. 3
2. Installation and Wiring ................................................................................................................................ 4
2.1 EM8 series inverter model explanation ............................................................................................. 4
2.2 Specification ...................................................................................................................................... 5
2.3 Installation size of inverter ................................................................................................................ 7
2.4 Cable sectional area of inverter and breaker ..................................................................................... 9
2.5 EM8 inverter circuit diagram .......................................................................................................... 10
2.6 Main circuit terminal explanation ................................................................................................... 11
2.7 Terminal of control circuit ............................................................................................................... 13
2.7.1 Explanation of terminals of control circuit ........................................................................... 14
2.8 JP jumper explanation ..................................................................................................................... 15
3. Operation and Running ............................................................................................................................. 16
3.1 The panel layout .............................................................................................................................. 16
3.2 The eM8 series frequency inverter parameter categories ................................................................ 16
3.2.1 Basic parameter .................................................................................................................... 16
3.2.2 Intermediate parameters ....................................................................................................... 16
3.2.3 Senior parameters: ................................................................................................................ 16
3.3 Working model of panel .................................................................................................................. 17
3.3.1 Monitoring state mode.......................................................................................................... 17
3.3.2 Parameter setting mode ........................................................................................................ 17
3.3.3 Checking mode of monitoring parameter ............................................................................. 17
3.3.4 The revise mode of digital setting frequency ....................................................................... 17
3.4 Parameter explanation ..................................................................................................................... 17
3.5 Panel function description ............................................................................................................... 17
3.6 Running way of panel ..................................................................................................................... 18
3.6.1Switching mode ..................................................................................................................... 18
3.6.2Monitor parameter inquiry .................................................................................................... 19
3.6.3 Setting parameter .................................................................................................................. 19
3.6.4 Modification of digital setting frequency ............................................................................. 19
4. Function Parameter List ............................................................................................................................ 21
I
Table of Contents
EM8 User's Manual
4.1 Basic running parameters (Group A)............................................................................................... 21
4.2 Intermediate running parameters (Group B) ................................................................................... 23
4.3 Advanced running parameters (Group C)........................................................................................ 27
4.4 State monitor parameter list ............................................................................................................ 31
4.5 Protection and solution .................................................................................................................... 33
4.6 Fault record inquiry ......................................................................................................................... 35
5. The Concrete Explanation of Function Parameters ................................................................................... 36
5.1 Inverter running parameters (Group A) ........................................................................................... 36
5.2 Intermediate running parameters (Group B) ................................................................................... 44
5.3 Advanced running parameter (Group C) ......................................................................................... 60
6. Care and Maintenance ............................................................................................................................... 76
6.1 Daily inspections and maintenance ................................................................................................. 76
6.2 Periodic maintenance ...................................................................................................................... 76
6.2.1 Inspection content................................................................................................................. 77
6.3 Inspection and replacement of damageable parts ............................................................................ 77
6.3.1 Filtering capacitors ............................................................................................................... 77
6.3.2 Cooling fan ........................................................................................................................... 77
6.4 Storage and warranty ....................................................................................................................... 77
6.4.1 Storage.................................................................................................................................. 77
6.4.2 Warranty ............................................................................................................................... 77
7. Application Examples ............................................................................................................................... 79
7.1 Panel control: start and stop, panel potentiometer set frequency .................................................... 79
7.1.1 Parameter settings................................................................................................................. 79
7.1.2 Basic wiring diagram............................................................................................................ 79
7.1.3 Running description ............................................................................................................. 79
7.2 Three wire control mode ................................................................................................................. 79
7.2.1 Parameter settings................................................................................................................. 79
7.2.2 The basic diagram ................................................................................................................ 80
7.2.3 Operating instructions .......................................................................................................... 80
7.3 External control mode, external voltage setting frequency ............................................................. 80
7.3.1 Parameter settings................................................................................................................. 80
7.3.2 The basic wiring ................................................................................................................... 80
7.3.3 Operating instructions .......................................................................................................... 80
7.4 Multi-step speed running, external control mode ............................................................................ 81
7.4.1 Parameter settings................................................................................................................. 81
7.4.2 Basic wiring diagram............................................................................................................ 81
7.4.3 Operating instructions .......................................................................................................... 81
7.5 Programmable multi-step speed control .......................................................................................... 81
7.5.1 Parameter settings................................................................................................................. 81
7.5.2 Basic wiring.......................................................................................................................... 82
7.5.3 Operating instructions .......................................................................................................... 82
7.6 The linkage control of many frequency inverter (Group Control) .................................................. 82
7.6.1 To use external voltage to realize many sets of inverter linkage control ............................. 82
7.6.1.1 Parameter Setting ...................................................................................................... 82
7.6.1.2 The basic diagram...................................................................................................... 82
7.6.1.3 Operating instructions ............................................................................................... 83
7.6.2 Using RS485 constitute a linkage running ........................................................................... 83
7.6.2.1 Parameter settings...................................................................................................... 83
7.6.2.2 Basic wiring diagram................................................................................................. 84
II
EM8 User's Manual
Table of Contents
7.6.2.3 Operating instructions ............................................................................................... 84
7.7 Inverters constitute a closed-loop control system............................................................................ 85
7.7.1 Parameter settings................................................................................................................. 85
7.7.2 Wiring ................................................................................................................................... 85
7.8 Use upper computer (PC) control many sets frequency inverters ................................................... 85
7.8.1 Parameter settings................................................................................................................. 85
7.8.2 Basic wiring diagram............................................................................................................ 85
7.8.3 Operating instructions .......................................................................................................... 86
8. Optional Accessories ................................................................................................................................. 87
8.1 Remote control cable and adapter ................................................................................................... 87
8.2 Braking accessories ......................................................................................................................... 87
Appendix 1: RS485 Communication Protocol .............................................................................................. 88
1. Summary ........................................................................................................................................... 88
1.1 Content of communication protocol ........................................................................................ 88
1.2 Scope of application ................................................................................................................ 88
1.2.1 Applicable devices ........................................................................................................ 88
1.2.2 Application type ........................................................................................................... 88
2. Bus structure and specification of communication protocol ............................................................. 88
2.1 Bus structure ............................................................................................................................ 88
2.2 Specification of communication protocol ............................................................................... 88
2.2.1 Data Format .................................................................................................................. 88
2.2.2 Baud rate ...................................................................................................................... 89
2.2.3 Communication mode .................................................................................................. 89
2.2.4 Communication rules ................................................................................................... 89
2.3 Structure of message ............................................................................................................... 89
2.3.1 Master command frame ................................................................................................ 90
2.3.2 Slave response frame. ................................................................................................... 90
2.4 Message data encoding............................................................................................................ 90
2.4.1 Frame header ................................................................................................................ 90
2.4.2 Data of user .................................................................................................................. 90
2.4.3 Frame footer(checksum) ............................................................................................... 93
3. Example of using............................................................................................................................... 94
III
1.Caution
EM8 User's Manual
1. Caution
To ensure that you're personal, equipment and property safety, in use before frequency inverter, please be
sure to read this chapter content, and comply with in the later carry, installation, running, debugging and
maintenance, running process.
Warning
● This symbol can lead to death, serious injury or heavy losses of property.
Caution
● This symbol can lead to body moderate damage or minor injuries, equipment damage.
1.1 Safety caution clause
1.1.1 To get the product's confirmation
Caution:
● The damaged and lack of parts of the frequency inverter, do not install. Or you risk of injury.
1.1.2 Installation
Caution
● When carrying, please take the bottom of inverter, otherwise the inverter body may lose and hurt your
foot.
● Please install in metal materials plate burning not easily. If installed near flammable materials, there is
danger of fire.
1.1.3 Wiring
Warning
● Before wiring, please confirm the input power has cut off.
● Please let electrical engineering personnel wiring homework.
● Grounding terminals must be reliable grounding.
● Prohibit to input the power to output U, V, W terminal. Add in the output terminal voltage will lead
frequency inverter internal damage.
● The emergency stop terminal after wiring, please check its actions are effective. Or you risk of injury.
● Prohibit to touch output terminal, short connect output terminals and shell and between output terminals.
Caution
● Please confirm the input power voltage is the same as inverter rated voltage.
● Please do not do withstand voltage test for frequency inverter.
● please connect brake unit and resistor according to frequency inverter circuit diagram.
Otherwise you may cause the damage of the semiconductor components, etc.
1.1.4 Running, maintenance, inspection
Warning
● Prohibit to touch inverter input and output terminals
● Before power on, please install terminal house properly, before you take off terminal house, please make
sure power off.
● Amateur technicians, please do not for maintenance and inspection.
1
EM8 User's Manual
1.Caution
Caution
● The panel board, control circuit board, driving circuit boards installed the CMOS integrated circuit, when
using, please pay special attention, Directly with finger touch circuit boards, electrostatic induction it might
damage the circuit boards integrated chips.
● Power on, please do not change wiring or remove the terminal wiring. Have the risk of damage to
equipment.
1.2 Precaution of use
In using of frequency inverter , please pay attention to following clause.
1.2.1 Motor insulation confirmation
When use inverter, please make sure motor insulation to avoid damaging other equipment. In the motor
environment is poor, please routine check the insulation of the motor to ensure the safety of the system.
1.2.2 Negative torque load
Such as load of lift and elevator is negative torque load, the system will feedback current to inverter, so
please consider to match optional braking resistor.
1.2.3 Mechanical resonance of load equipment
Inverter in certain output frequency range, may meet load mechanical resonance, must be set to avoid
jumping through this frequency.
1.2.4 The capacitor and piezoresistor of improving power factor of electricity
As the inverter output voltage is pulse wave, so the output side cannot connect capacitor and piezoresistor,
which will damage inverter, please take off. At same time, please do not add air switch and contactor on
output of inverter. For 1-1 diagram, (if you must add switch device, please make sure the inverter no output
current, and then you can take on-off switch).
Diagram 1-1: Prohibit to connect capacitor on output of inverter
1.2.5 To drop down KW because of basic frequency setting
When basic frequency setting is lower than rated frequency, please drop down the KW of matched motor in
avoiding motor overheat burnt.
1.2.6 Running upper 50Hz
If inverter output is upper 50Hz, except consider motor vibration, noise, please consider the rated speed of
your motor avoiding damaging motor.
1.2.7 Electronic thermal protection of motor
When properly matched motor, inverter has thermal protection for motor.
matched with motor, please adjust relative parameter to protect motor.
If inverter is not proper
1.2.8 To drop down KW because of altitude
When the altitude is higher than 1000m, the inverter must be drop down to match motor because of thin air
poor the cooling effect. As diagram 1-2 is the relationship curve of inverter rated current and altitude.
2
1.Caution
EM8 User's Manual
Diagram 1-2: The curve relationship of output current and altitude
1.2.9 About IP
Our inverter is IP20, you can add cabinet to improve its protection level.
1.3 End of life caution
When you end of inverter life:
The capacitor of main circuit and board can not burn, it will explode; Plastic house cannot burn, it will emit
toxic gas, please deal with it as industrial refuse.
3
EM8 User's Manual
2.Installation and Wiring
2. Installation and Wiring
2.1 EM8 series inverter model explanation
Model No.
Voltage
Power
Current
G.W
Inverter size
(KG)
H/W/D(mm)
2
150/85/115
3
173/133/133
4
235/137/175
7
305/208/185
12
390/240/235
21
460/260/248
40
580/320/295
45
590/380/312.5
95
744/512/273
140
793/583/315
300
1172/790/397
450
1828/981/496
G series
P series
(V)
(KW)
(A)
EM8-G1-d75
--
220
0.75
5
EM8-G1-1d5
--
220
1.5
7.5
EM8-G1-2d2
--
220
2.2
10
EM8-G3-d75
EM8-P3-1d5
380
0.75
2.5
EM8-G3-1d5
EM8-P3-2d2
380
1.5
3.7
EM8-G3-2d2
EM8-P3-004
380
2.2
5
EM8-G3-004
EM8-P3-5d5
380
4.0
8.5
EM8-G3-5d5
EM8-P3-7d5
380
5.5
11
EM8-G3-7d5
EM8-P3-011
380
7.5
17
EM8-G3-011
EM8-P3-015
380
11
25
EM8-G3-015
EM8-P3-018
380
15
33
EM8-G3-018
EM8-P3-022
380
18.5
39
EM8-G3-022
EM8-P3-030
380
22
45
EM8-G3-030
EM8-P3-037
380
30
60
EM8-G3-037
EM8-P3-045
380
37
75
EM8-G3-045
EM8-P3-055
380
45
90
EM8-G3-055
EM8-P3-075
380
55
110
EM8-G3-075
EM8-P3-093
380
75
150
EM8-G3-093
EM8-P3-110
380
93
176
EM8-G3-110
EM8-P3-132
380
110
210
EM8-G3-132
EM8-P3-160
380
132
250
EM8-G3-160
EM8-P3-185
380
160
300
EM8-G3-185
EM8-P3-200
380
185
340
EM8-G3-200
EM8-P3-220
380
200
380
EM8-G3-220
EM8-P3-250
380
220
415
EM8-G3-250
EM8-P3-280
380
250
470
EM8-G3-280
EM8-P3-315
380
280
520
EM8-G3-315
EM8-P3-350
380
315
600
4
2.Installation and Wiring
EM8 User's Manual
Model No.
Voltage
Power
Current
EM8-G3-350
EM8-P3-400
380
350
640
EM8-G3-400
EM8-P3-500
380
400
690
EM8-G3-500
EM8-P3-630
380
500
860
EM8-G3-630
--
380
630
1100
G.W
Inverter size
450
1828/981/496
2.2 Specification
Items
Input
Specification
Rated voltage and frequency
Voltage allowable deviation range
Voltage
Frequency
Output
Over-load capability
Control mode
Frequency
setting
resolution
Frequency
accuracy
200V~240V,320V~460V
0~380V
0Hz~500Hz
G3 Series:
150% rated current for 1 minute
180% rated current for 2seconds
P3 Series:
120% rated current for 1 minute
150% rated current for 2seconds
V/F Control
Analog terminal input 0.1% of max output frequency
Digital setting
0.01Hz
Panel analog setting
0.4 % of max frequency
External pulse
0.1% of max frequency
Analog Input
Within ±0.2% of max. output frequency
Digital Input
Within ±0.01% of setting output frequency
External pulse
Within ±0.1% of max. output frequency
V/F curve
(Voltage-frequency character)
Base frequency can be set from 5~500Hz arbitrarily,
and there are three kinds of curve: constant
torque ,Dec torque 1 and Dec torque 2.
Torque boost
Manual Setting: 0~20% of rated output, Auto-boost:
Automatically boost torque according to output
current.
Auto energy-saving running
Adjust output voltage and slip compensation properly
according to output current, which will make the
motor working in highest efficiency.
Acc./Dec time setting
0.1~6000seconds can be set continuously, and S type
and line type can be selected.
Control
character
Dynamic braking
Braking
DC braking
Auto current-limiting function
5
Single phase 220/Three Phase 380V, 50/60Hz
Over 75% (External braking resistor)
It is selected respectively at start and stop, and its
frequency is 0~15Hz, the action voltage is 0~15%, and
the action time is 0~20.0 second or act continuously.
Fast auto current-limiting function ensures not to occur
the over-current during the accelerate process or under
the impact load.
EM8 User's Manual
Items
Specification
Overvoltage prevention
Low noise running
Speed tracking restart
Freq
setting
signal
It can realize the smoothness restart and
instantaneous stop then restart function.
Digital setting
By the running panel.
Pulse input
Multi-speed control function /
Wobble frequency
0~50.000kHz (Upper limit and Lower limit can be
selected)
FWD, REV, startup signal can be selected and
self-keep (Three line control).
Embedded one timer and one counter , which will
help the system’s integration.
Seven steps programmable multi-speed control at
most, every step’s running direction, running time
can be set respectively. In external terminal control,
It reaches 15 steps, and there are 6 kind of running
modes. Include wobble frequency.
Common PID
Expediently compose the simple control system
without accessional PID controller.
Special for water
supply
(Need accessories)
Make it possible to construct the constant-pressure
water-supply system of 4 pumps switch at most,
which includes the following functions: pressure
upper or Lower limit alarm, Sleep or wake, Timing
water-supply etc. multi kind running mode.
Running function
Output
signal
Carrier freq. can be adjusted continuously form
1.5KHz to 15.0KHz, which can reduce the motor’s
noise furthest.
DC voltage 0~10V,-10V~10V, DC current 0~20mA
(Upper limit and Lower limit can be selected).
Timer and Counter
Built-in
PID
control
Ensure not over-voltage in Dec process.
Analog input
Startup signal
Control
character
2.Installation and Wiring
Setting the upper and lower limit of frequency,
frequency jump-running, reversal running limit, slip
frequency compensation, auto constant-voltage
running, RS485 communication frequency increment
and decrement control, fault self-restore running,
multi inverter coupled running.
Running status
(OC Output)
During the running of inverter, frequency arrival,
frequency level detection, over-load alarm, and
external fault stop-machine. Frequency upper-limit
arrival, Frequency lower-limit arrival, under-voltage
stop, zero-speed running, programmable multi-speed
running state, Internal counter arrival, Internal timer
arrival, pressure lower-upper limit alarm.
Indicating meter
Output Frequency, output current, output voltage,
motor speed, PID setting and feedback, external
voltmeter, external cymometer.
6
2.Installation and Wiring
EM8 User's Manual
Items
Specification
Running status
Output Frequency, output current, output voltage,
motor rotate speed, setting frequency, PID setting,
PID feedback, model temperature, accumulative
running time, analog I/O, terminal Input status.
Alarm content
Last six fault records, output frequency, setting
frequency, output current, output voltage, DC
voltage, model temperature, terminal status,
accumulative running time of Last fault trip.
Running
panel
display
Display
Over-current, over-voltage, under voltage, electronic
thermal protection, over-heat, short-circuit.
Protective / Alarm function
Operating
Environment
-10ºC to +50ºC
(Put down one grade capacity in 40 ºC ~50 ºC)
Temperature
Humidity
Below 90%RH(non-dewing)
Ambient environment
Indoors (no inflammable gasses or dust)
Altitude
Structure
Under 1000m
Protective class
IP20
Cooling method
Fans cooling
Mounting model
Wall mounting
2.3 Installation size of inverter
Diagram 2-1: Installation size of inverter
Inverter model
G Series
EM8-G1/G3
EM8-G1-d75
EM8-G1-1d5
EM8-G1-2d2
EM8-G3-d75
EM8-G3-1d5
EM8-G3-2d2
EM8-G3-004
7
P Series
EM8-P3
EM8-P3-1d5
EM8-P3-2d2
EM8-P3-004
EM8-P3-5d5
W1
(mm)
W
(mm)
H1
(mm)
H
(mm)
D1
(mm)
D
(mm)
Screw
standard
77
89
145
155
116
126
M4
123
133
163
173
123
133
M4
126
136
163
173
123
133
M4
123
137
225
235
160
175
M4
EM8 User's Manual
Inverter model
G Series
EM8-G1/G3
P Series
EM8-P3
EM8-G3-5d5 EM8-P3-7d5
EM8-G3-7d5 EM8-P3-011
2.Installation and Wiring
W1
(mm)
W
(mm)
H1
(mm)
H
(mm)
D1
(mm)
D
(mm)
Screw
standard
190
208
285
305
170
185
M4
190
240
372
390
220
235
M6
242
260
440.5
460
233
248
M6
283
320
550
580
280
295
M6
320
380
568
590
297.5
312.5
M8
445
512
714
744
258
273
M8
515
583
760
793
300
315
M8
EM8-G3-011 EM8-P3-015
EM8-G3-015 EM8-P3-018
EM8-G3-018 EM8-P3-022
EM8-G3-022 EM8-P3-030
EM8-G3-030 EM8-P3-037
EM8-G3-037 EM8-P3-045
EM8-G3-045 EM8-P3-055
EM8-G3-055 EM8-P3-075
EM8-G3-075 EM8-P3-093
EM8-G3-093 EM8-P3-110
EM8-G3-110 EM8-P3-132
EM8-G3-132 EM8-P3-160
EM8-G3-160 EM8-P3-185
EM8-G3-185 EM8-P3-200
EM8-G3-200 EM8-P3-220
Cabinet inverter:
Inverter model
G Series
EM8-G1/G3
P Series
EM8-P3
W
(mm)
H
(mm)
D
(mm)
790
1172
397
981
1828
496
EM8-G3-220 EM8-P3-250
EM8-G3-250 EM8-P3-280
EM8-G3-280 EM8-P3-315
EM8-G3-315 EM8-P3-350
EM8-G3-350 EM8-P3-400
EM8-G3-400 EM8-P3-500
EM8-G3-500 EM8-P3-630
Panel size is as diagram 2-2:
Suitable for:
EM8-G1-d75~EM8-G1-2d2
EM8-G3-d75~EM8-G3-2d2
Suitable for:
EM8-G3-004~EM8-G3-630
EM8-P3-5d5~EM8-P3-630
Diagram 2-2: Digital display running panel size
8
2.Installation and Wiring
EM8 User's Manual
The running panel disassemble and installation
Disassemble: Put your finger into the hole above panel and gently press down the fixed shrapnel, and then
take off key panel.
Installation: Put the panel into the slot until to hear a voice "click".
Inverter installation direction and space
The EM8 series frequency inverter for wall hung should be installed vertically for air circulation and heat
dissipation. The reserved space around inverter should be according to diagram 2-3. The fan of inverter
cabinet should be according to the diagram 2-4 correct way. The installation of many pcs inverters should
be installed as diagram 2-5 and diagram 2-6. As in the same vertical direction and installation, please note
that application of diversion board.
Diagram 2-3: Inverter around space
Diagram 2-5: The air division board
Diagram 2-4: Cabinet fan correct way
Diagram 2-6: Many pcs inverter installation
2.4 Cable sectional area of inverter and breaker
Please refer the following data to choose breaker capacity and cable sectional area.
Model
Input side
Main circuit(mm2)
Control circuit(mm2)
Breaker(A)
Input cable
Output cable
Control cable
EM8-G/P
G3/P3-d75
10
2.5
2.5
1
G3/P3-1d5
10
2.5
2.5
1
G3/P3-2d2
10
2.5
2.5
1
G3/P3-004
16
4
4
1
G3/P3-5d5
20
4
4
1
G3/P3-7d5
25
6
6
1
G3/P3-011
40
10
10
1
G3/P3-015
50
10
10
1
G3/P3-018
63
16
16
1
G3/P3-022
63
16
16
1
G3/P3-030
100
25
25
1
9
EM8 User's Manual
Model
EM8-G/P
G3/P3-037
G3/P3-045
G3/P3-055
G3/P3-075
G3/P3-090
G3/P3-110
G3/P3-132
G3/P3-160
G3/P3-185
G3/P3-200
G3/P3-220
G3/P3-250
G3/P3-280
G3/P3-315
G3/P3-350
G3/P3-400
G3/P3-500
G3/P3-630
Input side
Breaker(A)
125
160
160
250
250
315
400
630
630
630
630
800
800
1000
1000
1250
1250
1250
Main circuit(mm2)
Input cable
Output cable
25
25
35
35
35
35
50
50
70
70
70
70
95
95
120
120
150
150
150
150
150
150
150
150
185
185
185
185
240
240
240
240
300
300
300
300
2.Installation and Wiring
Control circuit(mm2)
Control cable
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2.5 EM8 inverter circuit diagram
Diagram 2-7: EM8 single phase 220-240V inverter diagram
10
2.Installation and Wiring
EM8 User's Manual
Diagram 2-8: EM8 Three phase 380V inverter diagram
2.6 Main circuit terminal explanation
Diagram 2-9: Main circuit terminal (1)
Series
G1
Terminal
mark
L1,L2
U,V,W
E
11
Suitable Inverter
EM8-G1-d75~EM8-G1-2d2
Function explanation
Single phase 220V AC power
Output three phase terminals connect with motor
Connect with earth terminal
EM8 User's Manual
2.Installation and Wiring
Diagram 2-10: Main circuit terminal (2)
Series
G3
P3
Terminal
mark
P+
PB
R,S,T
U,V,W
E
Suitable Inverter
EM8-G3-d75~EM8-G3-2d2
EM8-P3-1d5~EM8-P3-004
Function explanation
DC BUS positive pole
The braking resistor connect between P+ and PB
Input three phase terminals connect with grid
Output three phase terminals connect with motor
Connect with earth terminal
Diagram 2-11: Main circuit terminal (3)
Series
G3
P3
Suitable Inverter
EM8-G3-004~EM8-G3-018
EM8-P3-5d5~EM8-P3-022
Diagram 2-12: Main circuit terminal (4)
Series
G3
P3
Suitable Inverter
EM8-G3-022~EM8-G3-030
EM8-P3-030~EM8-P3-037
12
2.Installation and Wiring
EM8 User's Manual
Diagram 2-13: Main circuit terminal (5)
Series
G3
P3
Suitable Inverter
EM8-G3-037~EM8-G3-630
EM8-P3-045~EM8-P3-630
2.7 Terminal of control circuit
Diagram 2-14: Terminal of control circuit (1)
Series
G1
Suitable Inverter
EM8-G1-d75~EM8-G1-2d2
Diagram 2-15: Terminal of control circuit diagram (2)
Series
G3
P3
Suitable Inverter
EM8-G3-d75~EM8-G3-2d2
EM8-P3-1d5~EM8-P3-004
Diagram 2-16: Terminal of control circuit diagram (3)
Series
G3
P3
13
Suitable Inverter
EM8-G3-004~EM8-G3-630
EM8-P3-5d5~EM8-P3-630
EM8 User's Manual
2.Installation and Wiring
2.7.1 Explanation of terminals of control circuit
Type
Terminal
+10V/V+
Analog
input
-10V/VV/V1
V2
I
GND
X1
X2
X3
X4
X5
X6
PUL/X7
Control
terminal
Terminal function
Provide +5V/50mA power or +10V/10mA Selected by control panel JP1
power to external
(refer to the following diagram)
Provide -10V/10mA power
Analog input voltage signal input terminal 1 0~10V
Analog input voltage signal input terminal 2 -10~10V
Input positive terminal of frequency setting
0~20mA
current signal (Current input terminal).
Command terminal of Frequency setting
voltage signal (Power earth of V+,V- ),
Negative terminal of frequency setting
current signal(Current output terminal).
Multi-function input terminal 1
Multi-function input terminal 2
The detailed function of
Multi-function input terminal 3
Multi-function input terminal
Multi-function input terminal 4
is set by parameter b-63~b-69,
Multi-function input terminal 5
the terminal is valid while
Multi-function input terminal 6
being closed with COM
Multi-function input terminal 7,and it can
terminal.
also be as the input terminal of external
pulse signal (refer to the following diagram).
FWD
FWD control command terminal
REV
RST
REV control command terminal
Fault resetting input terminal
COM
Command terminal of control terminal
Provide +24V/50mA Power (COM is the
ground of power).
Analog voltage output, between GND and
AOI connected a current meter
Analog voltage output, between GND and
AOI connected a voltmeter
Programmable voltage signal output
terminal can connect the external voltmeter
(set by parameter A-10).
Programmable frequency signal output
terminal can connect the external
cymometer. (Set by parameter A-11)
+24V
AOI
AOV
AO
Analog
output
FM
OC
output
OC1
OC2
Fault
output
TA/TB/TC
RS485
ERH
485+/485E
Notes
Programmable open-circuit collector
output is set by parameter A-15 and A-16.
Normal: TA-TB is closed, TA-TC is off
Fault : TA-TB is off, TA-TC is closed
RS485 communication terminal
Earth terminal
The terminal is valid while being
closed with COM terminal. The
close of terminals FWD and
COM decides the inverter
running direction under panel
control mode..
Highest allowable Current:
1mA; Output voltage:0-10V
Max. output signal frequency:
50KHz Signal amplitude
value: 10V
The highest loadcurrent is 50m
and The highest withstand
voltage is 24V
Contact capacity: AC250V 1A
resistive load
14
2.Installation and Wiring
EM8 User's Manual
2.8 JP jumper explanation
The 0.4KW to 4KW JP on PCB board as following diagram 2-16:
Diagram 2-17: 0.4KW~4KW Jumper
The 5.5KW to 630 KW JP on PCB board as following diagram 2-17:
Diagram 2-18: 5.5KW~630KW Jumper
15
EM8 User's Manual
3.Operation and Running
3. Operation and Running
3.1 The panel layout
Diagram 3-1: Panel can set frequency, control model, display and monitor
3.2 The EM8 series frequency inverter parameter categories
3.2.1 Basic parameter
When you set "A-0" to "0", the inverter is under basic parameter control (group A); the intermediate
parameters (group b) and senior parameters (group C) hide and do not work.
When inverter is used for simple speed adjustment, please choose basic parameter running mode. Under
basic parameter mode, the advanced function was closed.
Remark
● When you change control mode from Group A& Group b to Group C, it will be valid after power off.
The factory setting is A-0=1. This intermediate control mode is suitable for most applications.
3.2.2 Intermediate parameters
When you set "A-0" to "1", the inverter is under basic parameter control (A group) and intermediate
parameters (group b); the senior parameters (group C) hide, and do not work.
Remark
● When you change control mode from Group A& Group b to Group C, it will be valid after power off.
● The factory setting is A-0=1. This intermediate control mode is suitable for most applications.
3.2.3 Senior parameters:
When you set "A-0" to "2", the inverter is under senior control mode, and inverter all parameter will be
valid. These functions must choose senior parameter model, such as: Inspection speed to start;
Programmable multi-step speed; built-in PID control; more pieces inverter linkage control; RS-485 control.
16
3.Operation and Running
EM8 User's Manual
3.3 Working model of panel
The panel can be divided into four control modes depends on the difference of content and command.
Except digital control model, the control modes were switched by
key.
3.3.1 Monitoring state mode
Monitoring state is working state of panel in most cases, in any case, as long as the continuous 1 minute
without key input, panel will automatically return to monitoring state.
Remark
● Inverter has 34 kinds monitoring states (d-0 to d-33); the parameter b-71 set to display one certain state.
● Under monitoring state, press
to quickly check inverter output current, output frequency and
output voltage.
3.3.2 Parameter setting mode
Under parameter setting mode, user can check and revise inverter function parameters.
Parameter setting mode and can be divided into the basic parameters setting mode, the intermediate running
parameters setting mode and senior running parameters setting mode. Respectively display the
corresponding parameter items or parameter values.
3.3.3 Checking mode of monitoring parameter
Under checking mode of monitoring parameter, user can check running parameter and fault record, the
panel displays the "d-□□" or its corresponding parameters (□□ said parameter items).
3.3.4 The revise mode of digital setting frequency
Under Monitoring state mode, user press
or
frequency and quickly revise frequency set by digital.
key to enter revise mode of digital setting
Remark
●The revise mode of digital setting frequency is only valid after setting parameter [A-1]=1, which is digital
frequency setting channel.
3.4 Parameter explanation
In this manual the parameter have three expressing styles.
[A-0] means A group 0 parameter item.
[A-0] means A group o parameter item setting value.
[A-0]=1 means A group 0 parameter item setting value is "1"
3.5 Panel function description
Items
Function description
Code display
A, Hz, V
Display
function
Panel
function
17
State
indicator
Display the running parameter and setting parameter of inverter.
The corresponding unit of current number display.
ALM
Alarm indicated light. It expresses that the inverter is in
over-current or over-voltage restrain state.
FWD
FWD indicated light. It expresses that inverter will output the
positive phase. If connecting with the motor, the motor will run in
positive direction.
FWD running key. The running instruction of inverter channel
can be set as panel control mode ([A-3]=0), press this key, send out
the positive running instruction. The inverter will run to the setting
frequency according to the appointed acc or dec curve.
EM8 User's Manual
Items
3.Operation and Running
Function description
REV and JOG key. The detailed function of this key is selected
by parameter [A-17]. When parameter [A-17] equals 0,this key
will take effect as reverse startup. When parameter [A-17] equals
1, the key is used as Jog control.
Stop and Fault reset key. The inverter is in normal running mode.
if the running instruction channel is set as panel stop valid mode,
([A-3] = 0, 2, 4),Press this key, the inverter will stop as the fixed
mode. In fault state, press the key, will reset the inverter and return
the normal stop state.
Menu switch mode. It is used for changing the working mode of
running panel.
Confirming key. It is used for confirming the current state or
parameter (Parameters are stored into the internal memory). In
monitor state, press the key, will enter the modification surface
directly, at the same time, MOD indicator light will be on, at that
time you can modify the instruction frequency by
.
Panel
function
Data modification key. It is used to modify the function code and
parameter. Synchronously press
key, will quicken the
codification speed of parameter. First press
key, then press
key will quicken the speed of modifying data. Soften
key will keep the current speed. If first press
then press
key will quicken the speed of modification data decreasing,
soften
key will keep the current speed. In state monitor
mode, if the frequency instruction channel is panel digital setting
mode ([A-1]=1), press
key will modify the frequency
instruction synchronously MOD indicated light will be on.
Data bits switch key. In any state of press key to modify the state
of data, press the key
to modify the digital bit, the
modification bit will be displayed blink.
3.6 Running way of panel
3.6.1Switching mode
Running
Change the working
mode of running panel
Description
Display
Current state of running panel:
State monitor mode
Display the current running parameter
of inverter, for example: 50.00
Enter Monitor parameter inquiry
mode
Display monitor code, for example: d-0
Enter Basic running parameter
setting mode
Display code: A-0
Enter Intermediate running
parameter setting mode
Display code:b-0
Enter Advanced running
parameter setting mode
Display code: C-0
Enter State monitor mode
18
3.Operation and Running
EM8 User's Manual
3.6.2Monitor parameter inquiry
Running
For example:
looking over the
setting frequency
Description
Display
Current state of running panel
monitor parameter inquiry mode.
d-0 (Example)
Monitor code plus 1
d-1
Modify monitor code to the
d-4
parameter d-4 which needs inquiry.
Confirm the inquiry monitor item.
Display the Parameter value according
to d-4 to set the frequency.
Switch the working mode of
running panel according to needs.
3.6.3 Setting parameter
Running
Change Acc time 1
from 5.0s to 10.0s (For
example)
Description
Display
Current state of running panel:
parameter setting mode (Basic
parameter for example).
A-0
Modify the code of parameter to
the expected value: A-7.
For example: A-7 (Acc time 1)
Confirm the parameter item being
modified.
Display the parameter value of A-7: 5.0
Modify the parameter to the
expected value: 10.0.
10.0
Confirm the parameter value, and
store them into the internal store
memory.
A-7
Switch the working mode of
running panel according to needs.
3.6.4 Modification of digital setting frequency
Mode 1:
Running
Description
Change the current
Current state of running panel:
digital setting frequency state monitor mode.
Running parameter (Decided by
parameter b-71)
Change digital setting frequency
to the expected value.
Digital setting frequency.
Store the digital setting frequency
into the internal, and return the
state monitor mode.
Running parameter (Decided by
parameter b-71)
The digital setting frequency after
modification is not stored into the
internal memory, the inverter will
return the state monitor mode
after power-off.
19
Display
EM8 User's Manual
3.Operation and Running
Mode 2:
Running
Description
Change the current
Current state of running panel:
digital setting frequency state monitor mode.
Display
Running parameter (Decided by
parameter b-71)
Enter digital frequency
modification mod.
Digital setting frequency
Modify the digital setting value to
the expected value.
Digital setting frequency
If digital setting frequency after
modification are not stored into
internal memory, after power-off,
the inverter will return State
monitor code.
Running parameter (Decided by
parameter b-71)
Remark
● Enter the frequency setting mode in mode 1, if there is no key-press in three seconds, the inverter will
return State monitor mode.
● Enter frequency setting mode in mode 2, if there is no key-press in ten seconds, the inverter will return
State monitor mode.
20
4.Function Parameter List
EM8 User's Manual
4. Function Parameter List
Description of symbols in the list:
" × " means that the parameter cannot be changed during running.
" * " means that the parameter has relation to the model of inverter.
"---" means that the parameter is the reserved one and displays " ---".
4.1 Basic running parameters (Group A)
Code
Name
Description
Min.
unit
Factory
setting
Change
Code
addr.
×
00H
Running parameter
selection
0: Basic running parameter
1: Intermediate running parameter 1
2: Senior running parameter
1
A-1
Frequency input
channel selection
0: Panel potentiometer
1: Panel digital setup
2: External voltage signal 1
3: External voltage signal 2
4: External current signal
5: UP/ DW Acc and Dec control
6: External pluse signal
7: RS485 interface
8: Combination given
9: External terminal selection
1
0
01H
A-2
Frequency digital
setup
0.0~Upper limit frequency
0.01
0.0
02H
Running command
channel selection
0: Panel control
1: External terminal (Key STOP
is invalid)
2: External terminal (Key STOP
is valid)
3: RS485 terminal (Key STOP is
invalid)
4: RS485 terminal (Key STOP is
valid)
1
0
03H
A-4
Running direction
control
0: Same with the setting direction
1: Reverse with the setting
1
direction
2: Reverse is prevented
0
04H
A-5
Rated voltage of load
motor
200~500V
1
220/380
×
05H
A-6
Rated frequency of
load motor
5.00~500.0Hz
0.01
50.00
×
06H
A-7
Acceleration time 1
0.1~6000s.
0.1
*
07H
A-8
Deceleration time 1
0.1~6000s.
0.1
*
08H
A-9
Acc & Dec mode
0:Straight Line 1: S curve
1
0
09H
A-0
A-3
21
EM8 User's Manual
Min.
unit
Factory
setting
1
0
0AH
1
0
0BH
0.50~2.00
0.01
1.00
0CH
Frequency output
(FM) gain
0.10~5.00
0.01
1.00
0DH
Analog output(AO1)
selection
0: AO output
1: 0~10V
2: 2~10V
3: 0~20mA
4: 4~20mA
1
3
0EH
1
0
0FH
1
1
10H
Code
Name
A-10
Analog output (AOI)
setting
A-11
Frequency output
(FM) setting
A-12
Analog output(AOI)
gain
A-13
A-14
4.Function Parameter List
A-15
OC1 Output setting
A-16
OC2 Output setting
Description
0: Output frequency
1: Output current
2: Output voltage
3: Motor rotate speed
4: PID setting
5: PID feedback
6. Panel potentiometer
7. Panel digital setup
8. External voltage signal 1
9. External voltage signal 2
10. External current signal
11. External pluse signal
0: In the running
1: Frequency arrival
2: Frequency level detection
signal (FDT)
3: Over-load alarm
4: External fault stop
5: Output frequency upper limit
is reached
6: Output frequency lower limit
is reached
7: Inverter under-voltage stop
8: Inverter is running at zero
speed
9: In the running process of PLC
10: Finish after a running cycle
of PLC
11: Finish after a running step of
PLC
12: PLC end of running
13: Internal timer reaches the
setting time
Change
Code
addr.
22
4.Function Parameter List
Code
EM8 User's Manual
Name
Description
Min.
unit
A-16
OC2 Output setting
14: Internal counter reaches peak
value
15: Internal counter value reaches
1
t the specified value
16: Upper limit of pressure alarm
17: Lower limit of pressure alarm
A-17
REV/JOG key
function selection
0: REV control;
1: JOG control
Factory
setting
Change
Code
addr.
1
10H
1
0
11H
Min.
unit
Factory
setting
Change
Code
addr.
×
12H
4.2 Intermediate running parameters (Group B)
Code
Name
Description
b-0
V/F curve type
selection
0: Constant torque curve
1: Decreasing torque curve 1
2: Decreasing torque curve 2
1
0
b-1
Torque boost
0~20%
1
*
13H
b-2
Torque boost mode
0: Manual
1: Auto
1
0
14H
b-3
Upper limit
frequency
Lower limit frequency~500.0 Hz
0.01
50.00
15H
b-4
Lower limit
frequency
0.0~Upper limit frequency
0.01
0.50
16H
b-5
Lower limit
frequency running
mode
0: Stop
1: Run as the lower-limit
frequency
1
0
b-6
Start mode
0: Start up from start frequency
1: First brake, then restart
2: Inspection and start
1
0
18H
b-7
Start frequency
0.00~10.00Hz
0.01
0.50
19H
b-8
Duration time at
start frequency
0.0~20.0s
0.1
0.0
×
1AH
b-9
DC brake voltage at
start
0~15%
1
0
×
1BH
b-10
DC brake time at
start
0.0~20.0s
0.1
0
×
1CH
b-11
Stop mode
0: Deceleration
1: Free stop
1
0
1DH
b-12
The starting
frequency of DC
braking stop
0.00~15.00Hz
0.01
3.00
1EH
b-13
The action time of
DC braking stop
0.0~20.0s
0.1
0.0
23
×
×
17H
1FH
EM8 User's Manual
Code
Name
Description
4.Function Parameter List
Min.
unit
Factory
setting
Change
Code
addr.
×
20H
b-14
The voltage of DC
braking stop
0~15%
1
5
b-15
Jog frequency
0.00~Upper limit frequency
0.01
10.00
21H
b-16
Jog Acc. time
0.1~6000s
0.1
10.0
22H
b-17
Jog Dec. time
0.1~6000s
0.1
10.0
23H
b-18
Multi-speed
frequency 1
0.00~Upper limit frequency
0.01
35.00
24H
b-19
Multi-speed
frequency 2
0.00~Upper limit frequency
0.01
15.00
25H
b-20
Multi-speed
frequency 3
0.00~Upper limit frequency
0.01
3.00
26H
b-21
Multi-speed
frequency 4
0.00~Upper limit frequency
0.01
20.00
27H
b-22
Multi-speed
frequency 5
0.0~Upper limit frequency
0.01
25.00
28H
b-23
Multi-speed
frequency 6
0.00~Upper limit frequency
0.01
30.00
29H
b-24
Multi-speed
frequency 7
0.00~Upper limit frequency
0.01
35.00
2AH
b-25
Multi-speed
frequency 8
0.00~Upper limit frequency
0.01
40.00
2BH
b-26
Multi-speed
frequency 9
0.00~Upper limit frequency
0.01
45.00
2CH
b-27
Multi-speed
frequency 10
0.00~Upper limit frequency
0.01
50.00
2DH
b-28
Multi-speed
frequency 11
0.00~Upper limit frequency
0.01
40.00
2EH
b-29
Multi-speed
frequency 12
0.00~Upper limit frequency
0.01
30.00
2FH
b-30
Multi-speed
Frequency 13
0.00~Upper limit frequency
0.01
20.00
30H
b-31
Multi-speed
frequency 14
0.00~Upper limit frequency
0.01
10.00
31H
b-32
Multi-speed
frequency 15
0.00~Upper limit frequency
0.01
5.00
32H
b-33
External running
command mode
selection
0: Two-line control mode 1
1: Two-line control mode 2
2: Three-line control mode
1
0
b-34
V1 Input lower-limit
voltage
0.00V~[b-35]
0.01
0.00
34H
b-35
V1 Input upper-limit
voltage
[b-34]~10.00V
0.01
10.00
35H
×
33H
24
4.Function Parameter List
EM8 User's Manual
Min.
unit
Factory
setting
0.01~5.00
0.01
1.00
36H
V2 Input lower-limit
voltage
-10.0V~[b-38]
0.1
0.0
37H
b-38
V2 Input upper-limit
voltage
[b-37]~10.0V
0.1
10.0
38H
b-39
V2 Input adjustment
coefficient
0.01~5.00
0.01
1.00
39H
b-40
V2 Input zero offset
-1.00~1.00V
0.01
0.00
3AH
b-41
V2 Input bipolar
control
0: Invalid
1: Valid
1
0
3BH
b-42
V2 Input bipolar
control zero relay
width
0.00~1.00V
0.01
0.20
3CH
b-43
Input lower-limit
current
0.00mA~[b-44]
0.01
4.00
3DH
b-44
Input upper-limit
current
[b-43]~20.00mA
0.01
20.00
3EH
b-45
Input adjustment
coefficient
0.01~5.00
0.01
1.00
3FH
b-46
Pulse input
0.000KHz~[b-47]
lower-limit frequency
0.001
0.000
40H
b-47
Pulse input
[b-46]~50.00KHz
upper-limit frequency
0.01
10.00
41H
b-48
Pulse input
0.01~5.00
adjustment coefficient
0.01
1.00
42H
b-49
Inputting lower-limit
0.00~Upper-limit frequency
equal to set frequency
0.01
0.00
43H
b-50
Inputting upper-limit
0.00~Upper-limit frequency
equal to set frequency
0.01
50.00
44H
b-51
Running monitor
item selection 2
0~19
1
1
45H
b-52
Running monitor
item selection 3
0~19
1
2
46H
b-53
Running monitor
item recycle quantity
1~3
1
3
47H
b-54
Stop monitor item
selection
0~19
1
0
48H
b-55
Analog input channel
0.01~5.00s
filter time constant
0.01
0.20
49H
b-56
Frequency input
channel combination
100
101
Code
Name
b-36
V1 Input adjustment
coefficient
b-37
25
Description
Refer to the detailed description
of function
Change
×
Code
addr.
4AH
EM8 User's Manual
Code
Name
Description
4.Function Parameter List
Min.
unit
Factory
setting
Change
Code
addr.
b-57
Carrier frequency
1.5~15KHz
0.1
*
4BH
b-58
Frequency reach
checkout amplitude
0. 00~20.00Hz
0.01
5.00
4CH
b-59
FDT (frequency
reach detection)
0.00~Upper-limit frequency
0.01
10.00
4DH
b-60
FDT output delay
time
0.0~20.0s
0.1
2.0
4EH
b-61
Over-load alarm level 50~200%
1
110
4FH
b-62
Over-load alarm
delay time
0.1
2.0
50H
b-63
Input terminal 1
function selection
(X1: 0~28)
1
1
×
51H
b-64
Input terminal 2
function selection
(X2: 0~28)
1
2
×
52H
b-65
Input terminal 3
function selection
(X3: 0~28)
1
3
×
53H
b-66
Input terminal 4
function selection
(X4: 0~28)
1
4
×
54H
b-67
Input terminal 5
function selection
(X5: 0~28)
1
6
×
55H
b-68
Input terminal 6
function selection
(X6: 0~29)
1
0
×
56H
b-69
Input terminal 7
function selection
(X7: 0~30)
1
30
×
57H
b-70
Linear speed
coefficient setting
0.01
1.00
0.0~20.0s
0: Control terminal is idle
1: Multi-speed control terminal 1
2: Multi-speed control terminal 2
3: Multi-speed control terminal 3
4: Multi-speed control terminal 4
5: FWD Jog control
6: REV Jog control
7: Free stop control
8: External device fault input
9: Acc & Dec time selection
terminal 1
10: Acc & Dec time selection
terminal 2
11: Freq. ascending control (UP)
12: Freq descending control (DW)
13: Frequency setting channel
selection terminal 1
14: Frequency setting channel
selection terminal 2
15: Frequency setting channel
selection terminal 3
16: Simple PLC pause
17: Three-line running control
18: DC brake control
19: Internal timer trigger terminal
20: Internal timer reset terminal
21: Internal counter clear terminal
22: Closed-loop control invalid
23~28: Reserved
29:Internal counter clock terminal
30. External pulse input
0.01~100.0
58H
26
4.Function Parameter List
EM8 User's Manual
Min.
unit
Factory
setting
1
0
59H
Parameter revise
protection
0: All parameters are allowed to
be revised
1: Prohibit to revise all parameters 1
except for parameter [b-72]
2: Prohibit revise all parameters
0
5AH
Parameter
initialization
0: No action
1: Initialization action
2: Clear the fault records
1
0
×
5BH
Min.
unit
Factory
setting
Change
Code
addr.
×
5CH
Code
Name
Description
b-71
Monitor item
selection
0~19
b-72
b-73
Change
Code
addr.
4.3 Advanced running parameters (Group C)
Code
Name
Description
C-0
Slip frequency
compensation
0~150%
1
0
C-1
Over-load &
over-heat protection
mode
0: Lock the output
1: Limit-current running(Alarm)
1
0
C-2
Motor over-load
protection
50~110%
1
110
×
5EH
C-3
Auto energy-saving
0: Invalid
1: Valid
1
0
×
5FH
C-4
Restart after
power-off
0: Invalid
1: Valid
1
0
×
60H
C-5
Waiting time for
1~10s
restart after power-off
1
5
×
61H
C-6
Fault self-restoring
0, 1, 2
1
0
×
62H
C-7
Self-restoring interval 2~20s
1
5
×
63H
1
0
64H
65H
5DH
C-8
Auto stable voltage
0: Invalid
1: Valid
2: Invalid only at deceleration
C-9
Current-limit level
110%~200%
1
150
C-10
FWD & REV dead
time
0.0~5.0s
0.1
0.1
×
66H
C-11
Internal timer set
value
0.1~6000.0s
0.1
0.0
×
67H
C-12
Final value set of
internal counter
1~60000
1
1
×
68H
C-13
Internal counter
setting
1~60000
1
1
×
69H
27
EM8 User's Manual
4.Function Parameter List
Min.
unit
Factory
setting
Change
Code
addr.
C-14
Programmable
multi-speed running
setting
LED Ten digital: simple PLC
running time unit:
1: Min
0: Second
LED first digital: PLC running
style:
0: No action
1: Single loop
2: Continuous loop
3: Keep the final value
4: Wobble frequency running
5: Single loop stop mode
6: Continuous loop stop mode
7: Keep the final value stop
mode
1
0
×
6AH
C-15
Step 1 running time
0.1~6000s
0.1
10.0
×
6BH
C-16
Step 1 running
direction
0: FWD
1: REV
1
0
6CH
C-17
Step 1 Acc/Dec time
0.1~6000s
0.1
10.0
6DH
C-18
Step 2 running time
0.0~6000s
0.1
10.0
C-19
Step 2 running
direction
0: FWD
1: REV
1
0
6FH
C-20
Step 2 Acc/Dec time
0.1~6000s
0.1
10.0
70H
C-21
Step 3 running time
0.0~6000s
0.1
10.0
C-22
Step 3 running
direction
0: FWD
1: REV
1
0
72H
C-23
Step 3 Acc/Dec time
0.1~6000s
0.1
10.0
73H
C-24
Step 4 running time
0.0~6000s
0.1
10.0
C-25
Step 4 running
direction
0: FWD
1: REV
1
0
75H
C-26
Step 4 Acc/Dec time
0.1~6000s
0.1
10.0
76H
C-27
Step 5 running time
0.0~6000s
0.1
10.0
C-28
Step 5 running
direction
0: FWD
1: REV
1
0
78H
C-29
Step 5 Acc/Dec time
0.1~6000s
0.1
10.0
79H
C-30
Step 6 running time
0.0~6000s
0.1
10.0
C-31
Step 6 running
direction
0: FWD
1: REV
1
0
7BH
C-32
Step 6 Acc/Dec time
0.1~6000s
0.1
10.0
7CH
C-33
Step 7 running time
0.0~6000s
0.1
10.0
Code
Name
Description
×
×
×
×
×
×
6EH
71H
74H
77H
7AH
7DH
28
4.Function Parameter List
Code
EM8 User's Manual
Name
Description
Min.
unit
Factory
setting
Change
Code
addr.
C-34
Step 7 running
direction
0: FWD
1: REV
1
0
7EH
C-35
Step 7 Acc/Dec time
0.1~6000s
0.1
10.0
7FH
C-36
Jump frequency 1
0.00~Upper-limit frequency
0.01
0.00
80H
C-37
Amplitude of jump
frequency 1
0.00 ~5.00Hz
0.01
0.00
81H
C-38
Jump frequency 2
0.00~Upper-limit frequency
0.01
0.00
82H
C-39
Amplitude of jump
frequency 2
0.0 0~5.00Hz
0.01
0.00
83H
C-40
Jump frequency 3
0.00~Upper-limit frequency
0.01
0.00
84H
C-41
Amplitude of jump
frequency 3
0.00 ~5.00Hz
0.01
0.00
85H
C-42
Acceleration time 2
0.1~ 6000s
0.1
*
86H
C-43
Deceleration time 2
0.1~ 6000s
0.1
*
87H
C-44
Acceleration time 3
0.1~ 6000s
0.1
*
88H
C-45
Deceleration time 3
0.1~ 6000s
0.1
*
89H
C-46
Acceleration time 4
0.1~ 6000s
0.1
*
8AH
C-47
Deceleration time 4
0.1~ 6000s
0.1
*
8BH
Built-in PID control
0: No PID control
1: Normal PID control
2: Constant-pressure
water-supply PID
3: Double-pump constant
pressure water-supply PID
1
(Need accessory)
4: Triple-pump constant pressure
water-supply PID (Need
accessory)
5: Four-pump constant pressure
water-supply (Need
accessories)
0
×
8CH
Built-in PID
configuration
channel selection
0: Panel potentiometer
1: Panel digital setting
2: External voltage signal 1
(0~10V)
3: External voltage signal 2
(-10V~10V)
4: External current signal
5: External pulse signal
6: RS485 interface setting
0
×
8DH
C-48
C-49
29
1
EM8 User's Manual
Code
Name
Description
4.Function Parameter List
Min.
unit
Factory
setting
Change
Code
addr.
1
3
×
8EH
×
8FH
C-50
PID feedback
channel selection
0: Voltage input 1 (0~10V)
1: Current input
2: Pulse input
3: Voltage input 2 ( -10V~10V )
C-51
Feedback signal
character
0: Positive character
1: Negative character
1
0
C-52
Feedback channel
gain
0.01~10.00
0.01
1.00
90H
C-53
PID setup and
feedback display
coefficient
0.01~100.000
0.01
1.00
91H
C-54
PID controller
structure selection
0: Proportion
1: Integral
2: Proportion & integral
3: Proportion & Integral &
Differential
1
1
C-55
Proportion gain
0.00~5.00
0.01
0.50
93H
C-56
Integration time
constant
0.1~100.0s
0.1
10.0
94H
C-57
Differential gain
0.0~5.0
0.1
0.1
C-58
Sampling period
0.01~1.00s
0.01
0.10
96H
C-59
Allowable deviation
0~20%
1
0
97H
C-60
PID feedback
wire-break detection
threshold
0.0~20.0%
0.1
0.0
98H
C-61
PID feedback
wire-break action
selection
0: Stop
1: Running as the digital setting
frequency
2: Running as the upper-limit
frequency
3: Running as the half of
upper-limit frequency
1
0
99H
C-62
Full scale of remote
manometer
0.001~20.00Mpa
0.001
1.000
9AH
C-63
Alarm lower-limit
pressure
0.001~[C-64]
0.001
0.000
9BH
C-64
Alarm upper-limit
pressure
[C-63]~[C-62]
0.001
1.000
9CH
C-65
Lower-limit value of
pressure
0.001~[C-66]
0.001
0.000
9DH
C-66
Upper-limit value of
pressure
[C-65]~[C-62]
0.001
1.000
9EH
×
×
92H
95H
30
4.Function Parameter List
Code
EM8 User's Manual
Name
Description
Min.
unit
Factory
setting
0.001
0.000
9FH
Change
Code
addr.
C-67
Wake up threshold
value
C-68
Sleep threshold value [C-67]~[C-62]
0.001
1.000
A0H
C-69
Pump switch time
0.1s~1000s
0.1
300.0
A1H
C-70
Electromagnetic
switch delay time
0.1~10.0h
0.1
0.5
C-71
Multi-pump running
mode
0: Switch as the fixed sequence
1: Timing alternation run
1
0
A3H
C-72
Timing alter interval
0.5~100.0h
0.1
5.0
A4H
C-73
Timing water-supply
0.5~24.0h
0.1
24.0
A5H
C-74
AM output hardware
calibration factor
95.0~104.5%
0.1
100%
A6H
C-75
AO output hardware
calibration factor
95.0~104.5%
0.1
100%
A7H
C-76
Suppress swing of
analog input
0~30
1
3
A8H
C-77
Braking unit usage
0~100
1
25
A9H
C-78
Inverter address
0~30
1
0
×
AAH
Data format
0: No parity check
1: Even parity check
2: Odd parity check
1
0
×
ABH
C-80
Baud rate
0: 1200 bps
1: 2400 bps
2: 4800 bps
3: 9600 bps
4: 19200 bps
1
3
×
ACH
C-81
Master inverter
setting
0: The inverter is slave
1: The inverter is master
1
0
×
ADH
C-82
Linkage run setting
ratio
0.10~10.00
0.01
1.00
AEH
1
0
AFH
0.01
1.00
B0H
C-79
0.001~[C-68]
RS485 communication
0: Stop
C-83 wire-break action
1: Keep the existing state
mode
C-84
Panel potentiometer
gain factor
0.01~5.00
×
A2H
4.4 State monitor parameter list
Monitor code
31
Content
Unit
Address of code
d-0
Present output frequency of inverter
0.01Hz
D8H
d-1
Present output current of inverter
0.1A
DCH
d-2
Present output volt of inverter
1V
DDH
d-3
Motor’s current speed
1Rpm
DEH
EM8 User's Manual
Monitor code
4.Function Parameter List
Content
Unit
Address of code
d-4
Present setting frequency of inverter
0.01Hz
DFH
d-5
DC bus voltage
1V
E0H
d-6
PID setting value
0.1%Mpa*
E1H
d-7
PID feedback value
0.1%Mpa*
E2H
d-8
Running linear speed
0.01*
E3H
d-9
Setting linear speed
0.01*
E4H
d-10
Input AC voltage
1V
E5H
o
d-11
Temperature of IGBT
0.1 C
E6H
d-12
Total running time
1H
E7H
d-13
Input terminal state
d-14
Analog input voltage V1
0.1V
E9H
d-15
Analog input voltage V2
0.1V
EAH
d-16
Analog input current I
0.1mA
EBH
d-17
External pulse input
0.01KHz
ECH
d-18
Analog output AO
0.01V
EDH
d-19
Frequency output FM
0.01Hz*
EEH
d-20
First fault record
EFH
d-21
Second fault record
F0H
d-22
Third fault record
F1H
d-23
Fourth fault record
F2H
d-24
Fifth fault record
F3H
d-25
Sixth fault record
F4H
d-26
Output frequency of last fault
0.01Hz
F5H
d-27
Setting frequency of last fault
0.01Hz
F6H
d-28
Output current of last fault
0.1A
F7H
d-29
Output voltage of last fault
1V
F8H
d-30
DC voltage of last fault
1V
d-31
IGBT temperature of last fault
d-32
Input terminal state of last fault
d-33
Accumulated running time of last fault
E8H
F9H
o
0.1 C
FAH
FBH
1H
FCH
Remark
● Code address is the appointed address while visiting these monitor parameters by RS485 interface.
Parameters d-13, d-32 display symbols and the external input terminal state corresponding relation is as
follows:
32
4.Function Parameter List
EM8 User's Manual
4.5 Protection and solution
Code
Probable Cause
Er. 01
Over-current
during Acc
1. Acceleration time is too short. 1. Extend the acceleration time.
2. Descend the torque boost or
2. Torque boost is too high or
adjust the V/F curve.
V/F curve is not suitable.
Er. 02
Over-current
during Dec
Deceleration time is too short.
Increase the deceleration time.
Er. 03
Over-current
During running
Load occurs mutation.
Decrease fluctuation of load.
Er. 04
Over-voltage
in acceleration
1. Input -voltage is too high.
2. Power switch is turned on
and off frequently.
1. Check the voltage of power.
2. Control the on-off of inverter
by the control terminal.
Over-voltage
in deceleration
1. Extend the deceleration time.
2. Check the voltage of power
1. Deceleration time is too short.
supply.
2. Input-voltage is abnormal.
3. Installation or reselect the
braking resistor.
Er. 06
Over-voltage
during running
1. Power voltage is abnormal.
2. There are energy feedback
load.
1. Check the voltage of power
supply.
2. Installation or reselect the
braking resistor.
Er. 07
Over-voltage at
stop
Power voltage is abnormal.
Check the voltage of power.
Er. 08
Low-voltage
during running
1. Power voltage is abnormal
there is great fluctuation of
load in electric network.
1. Check the voltage of power.
2. Provide the supply power
separately.
Er. 05
33
Fault description
Solution
EM8 User's Manual
Code
4.Function Parameter List
Probable Cause
Fault description
Solution
Inverter overload
1. Load is too heavy.
2. Acc time is too short.
3. Torque boost is too high or
V/F curve is not suitable.
4. Electric network is too low.
1. Reduce the load or replace
with higher capacity inverter.
2. Prolong Acc time.
3. Decrease the torque boost
voltage or adjusting V/F curve.
4. Check mains voltage.
Motor overload
1. Load is too heavy.
2. Acc time is too short.
3. The setting of protection
factor is too little.
4. Torque boost is too high or
V/F curve is not suitable.
1. Reduce the load.
2. Prolong Acc time.
3. Increase the over-load protection
factor of motor (C-2).
4. Decrease torque boost voltage
and adjust V/F curve.
Inverter overheat
1. Air duct is blocked.
2. Too high environment
temperature.
3. Fan is damaged.
1. Clear air duct or improve the
air condition.
2. Improve ventilation condition
or decrease carrier frequency.
3. Replace fan.
Output grounded
1. The output terminal of
inverter grounds.
2. The wire is too long between
inverter and motor and the
carrier frequency is too high.
1. Check the connecting wire.
2. Shorten the connection wire or
reduce the carrier frequency.
Interference
Miss-running because of
ambient electromagnetic
interference.
Add the absorption capacitor to
the interference source around
inverter.
Output lack phase
Badness or disconnection of
wire between Inverter and
motor.
Check the connection wire.
Er. 15
IPM fault
1. Output being short circuit or
grounding.
2. Load is too heavy.
1. Check the wire.
2. Look for the service to the
manufacture.
Er. 16
External
equipment fault
There are signal input on the
peripheral equipment fault
input terminal of Inverter.
Check the signal source and the
pertinent equipments.
Er. 17
Current detecting
fault
1. The current detecting
equipment or circuit is damaged. Look for the services to
manufacture.
2. Auxiliary power source has
problem.
Er. 18
RS485
communication
fault
The sending and receiving of
data occurs error in series
communication.
Er. 09
Er. 10
Er. 11
Er. 12
Er. 13
Er. 14
1. Detect the wire.
2. Look for the help to the
manufacture.
34
4.Function Parameter List
Code
Er. 19
Er. 20
EM8 User's Manual
Probable Cause
Fault description
Solution
PID feedback
fault
1. PID feedback signal wire is
disconnection.
2. The transistor which is used
to detect the feedback signal,
occurs the fault.
3. The feedback signal is
inconsistent with the setting
signal.
1. Check the feedback channel.
2. Check whether there is fault on
transistor.
3. Checkup the feedback signal
whether consistent with the
setting.
The accessories
connecting with
the water supply
system occurs the
fault
1. No special accessories but
select multi-pump
constant-pressure water
supply PID mode.
2. The connection with the
accessory occurs the error.
1. Improve the ordinary PID or
single-pump constant-pressure
water-supply mode.
2. Purchase the accessory.
3. Check whether the connection
between main control panel
and accessories is solid.
4.6 Fault record inquiry
This series of inverter record the last six fault codes and the output parameters of last fault. This
information is aid in looking up the fault causes. Fault information and State monitor parameters are
stored uniformly, so please refer to the running way to look up the information.
Monitor
Contents
item
35
d-20
First fault record
d-21
Second fault record
d-22
Third fault record
d-23
Fourth fault record
d-24
Fifth fault record
d-25
Sixth fault record
d-26
Output frequency of last fault
d-27
Setting frequency of last fault
d-28
Output current of last fault
d-29
Output voltage of last fault
d-30
DC voltage of last fault
d-31
IGBT temperature of last fault
d-32
Input terminal state of last fault
d-33
Accumulated running time of last fault
EM8 User's Manual
5.The Concrete Explanation of Function Parameters
5. The Concrete Explanation of Function Parameters
5.1 Inverter running parameters (Group A)
Code
A-0
Name
Running parameter
Selection
Description
0: Basic running parameter
1: Intermediate running parameter
2: Senior running parameter
Factory setting
1
[A-0] is used to set running model to simplify the running, user can choose according to application.
0: Basic running parameter. Inverter working and controlled by(A-0~A-17). Other parameters hide and
will not affect the running of the frequency inverter.
1: Intermediate running parameter. Inverter working and controlled by(A-0~A-17) and (b-0~b-73).
Other parameters hide and will not affect the running of the frequency inverter.
2: Senior running parameter. Inverter working and controlled by(A-0~A-17) and (b-0~b-73) and senior
parameter (C-0~C-84).
Remark
● Changing running mode will be valid after power off.
Code
A-1
Name
Frequency input channel
selection
Description
0: Panel potentiometer
1: Panel digital setup
2: External voltage signal 1
3: External voltage signal 2
4: External current signal
5: UP/ DW Acc and Dec control
6: External pluse signal
7: RS485 interface
8: Combination given
9: External terminal selection
Factory setting
0
0: Panel potentiometer. The running frequency input by potentiometer of panel.
1: Panel digital setup. The running frequency input by keys of panel.
2: External voltage signal 1. The running frequency input by external analog voltage terminal "VI1"
(0~10V).
3: External voltage signal 2. The running frequency input by external analog voltage terminal "VI2"(-10~
10V).
4: External current signal. The running frequency input by external analog current terminal II(0~20mA).
5: UP/DW terminal Acc and Dec control. The running frequency input by terminal UP/DW (UP,DW
terminal parameter set by b-63~b-69), when UP-COM close, running frequency increase, when DW-COM
chose, the running frequency decrease. UP/DOWN together close to COM, the running frequency no
change. The frequency UP/DOWN ratio set by parameter of increase and decrease time.
6: External pulse signal. The running frequency input by external pulse signal. The input terminal of pulse
set by parameter "b-69" (X7).
7: RS485 interface. The running frequency input by upper PC through RS485 port, when use PLC or
linkage control many pieces inverter, please choose this frequency input mode.
8: Combination given. The running frequency input by linear combination of all input channels, the
combination style set by parameter b-56.
9: External terminals selection. The input channel of running frequency choose by external terminals
(external terminals set parameter b-63~b-69). The relationship between terminals state and running
36
5.The Concrete Explanation of Function Parameters
frequency channel is as the follow columns:
Frequency setting
Frequency setting
choose terminal-3
choose terminal-2
EM8 User's Manual
Frequency setting
choose terminal-1
Frequency input channel
0
0
0
Panel potentiometer
0
0
1
Panel digital setup
0
1
0
External voltage signal VI1
0
1
1
External voltage signal VI2
1
0
0
External current signal II
1
0
1
UP/DW terminal
1
1
0
External pulse
1
1
1
RS485 interface
Remark
● "0" means the corresponding terminal close to COM, "1" means open.
Code
A-2
Name
Frequency digital setup
Description
0.0~Upper limit frequency
Factory setting
0.0
When frequency input channel was choose "panel digital input" ([A-1] = 1),the inverter output frequency
decided by [A-2] value.
Under panel state monitoring mode, user press
or
key can directly revise [A-2] value {please
refer to 3.4~panel running method: (4) the revise of digital setting frequency}.
Code
A-3
Name
Running command
channel selection
Description
0: Panel control
1: External terminal (STOP key is
invalid)
2: External terminal (STOP key is valid)
3: RS485 interface(STOP key is invalid)
4: RS485 interface (STOP key is valid)
Factory setting
0
The parameter is used to choose stop or start command channel.
0: Panel command. Inverter stop and start command was controlled by panel. The running direction was
controlled by state of external terminals FWD-COM. FWD-COM close, inverter forwarder running,
FWD-COM loose, inverter reverse running. The terminal FWD-COM state also decide JOG running
direction.
1: External terminal command (STOP key is invalid). The start and stop of inverter was controlled by
external terminal FWD,REV connect and disconnect with COM. The inverter factory setting is as
following diagram mode. Under this mode, the panel is invalid.
2: External terminal command (STOP key is valid). The basic function is same as mode 1; Under this
mode, panel STOP key can be press to stop inverter, if user wants restart, please use external input to stop
command and input start command to restart inverter.
Command
Stop command
Forward command
Reverse
command
Terminal state
3: RS485 interface (STOP key is invalid). The RS485 interface will receive the running command from
upper PC or PLC or master inverter. The keys of panel are invalid under this control mode.
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EM8 User's Manual
5.The Concrete Explanation of Function Parameters
4: RS485 interface (STOP key is valid).The basic function is same as mode 3; under this model, the panel
STOP key can be press to stop inverter, if user wants to restart inverter, please use RS485 to input stop
command and input start command to restart inverter
Code
A-4
Name
Running direction control
Description
0: Same with setting direction
1: Reverse with setting direction
2: Reverse prevented
Factory setting
0
This parameter is used to change inverter output three phase sequences, to change motor running direction
0: Same with setting direction
1: Reversed with setting direction: When user choose this direction mode, the inverter output phase
sequence is reversed to setting direction, for example FWD short connect with COM, motor will reverse,
and panel FWD key will become reverse command key.
2: Reverse prevented. The inverter will only forward running.
Remark
● [A-4] Setting is valid together with direction control of external terminals.
Code
Name
Description
Factory setting
A-5
Rated voltage of load
motor
200~500V
220V/380V
A-6
Rated frequency of load
motor
5.00~500.0Hz
50.00
Please set this parameter according to motor nameplate.
Code
Name
Description
Factory setting
A-7
Acceleration time 1
0.1~6000s.
*
A-8
Deceleration time 1
0.1~6000s.
*
Acceleration time is the time that inverter output frequency increases from 0.0Hz to 50.00Hz.
Deceleration time is the time that inverter output frequency decreases from 50.00Hz to 0.0Hz.
Code
A-9
Name
Acc & Dec mode
Description
0:Straight line
1: S curve
Factory setting
0
0: Straight line: The acceleration and deceleration of straight line is proper for most loads.
1: S curve: The acceleration and deceleration of S curve is proper for load with starting noise and vibration.
As diagram 5-1.
Diagram 5-1: The inverter acceleration and deceleration curve
38
5.The Concrete Explanation of Function Parameters
Code
Name
A-10
Analog output (AOI)
setting
A-11
Frequency output (FM)
setting
EM8 User's Manual
Description
0: Output frequency
1: Output current
2: Output voltage
3: Motor rotate speed
4: PID setting
5: PID feedback
6. Panel potentiometer
7. Panel digital setup
8. External voltage signal 1
9. External voltage signal 2
10. External current signal
11. External pluse signal
The definition of analog output terminal (AO) and frequency output terminal (FM):
0: Inverter output frequency
1: Inverter output current
2: Inverter output voltage
3: Motor rpm
4: PID setting
5: PID feedback
6: Panel potentiometer
7: Panel digital setting
8: External voltage signal 1
9: External voltage signal 2
10: External current signal
11: External pulse signal
Diagram 5-2: The output content of analog output terminal AO
39
Factory setting
0
0
EM8 User's Manual
5.The Concrete Explanation of Function Parameters
Diagram 5-3: The output content of frequency output terminal AO
AO has 5 kinds of output mode(0:Pulse output,1:0~10V analog output,2:2~10V analog output,3:0~20mA
analog output,4:4~20mA analog output), please refer to b-14 explanation for more details.
Code
Name
Description
Factory setting
A-12
Analog output (AOI) gain
0.50~2.00
1.00
A-13
Frequency output (FM)
gain
0.10~5.00
1.00
Diagram 5-4: [A-12] = 2.00
40
5.The Concrete Explanation of Function Parameters
EM8 User's Manual
Diagram 5-5: [A-13] = 5.00
[A-12],[A-13] is used set value of AO terminal output voltage and FM terminal output frequency.
That is Crosscourt slope ratio of diagram 5-4, diagram 5-5:
Code
A-14
Name
Analog output(AO1)
selection
Description
0: AO output
1: 0~10V
2: 2~10V
3: 0~20mA
4: 4~20mA
Factory setting
3
0: AO Output
1: Output 0~10V
2: Output 2~10V
3: Output 0~20mA
4: Output 4~20mA.
When A-14choose 1 or 2, the diagram of JP3 is like right picture.
Take off the jumper between AO and FM, and use this jumper to connect AO terminal of JP3
to terminal of "0/2~10V", same as diagram, set [A-14] is 1, and external terminal AO output
is 0~10V,[ A-14] is 2: the external terminal AO output is 2~10V.
When [A-14] set to 3 or 4, jumper JP3connection is as diagram.
Take off the jumper between AO and FM, and use the jumper to connect AO terminal of
JP3 of terminal of 0/4~20mA, same as diagram, set [A-14] is 3,and external terminal AO
output is 0~20mA;[A-14] is 4: the external terminal AO output is 4~20mA.
Affected by the environment and the dispensability of AO devices, the output may be offset, if this happens,
please refer to the description of parameters (C-74, C-75).
A-14 is set at the same time decided D-19 output, when the selection is 0, D-19 display AO output
frequency corresponding to the current operating frequency (correspondence between the user's own
decision). When a choice of 1 or 2, D-19 display output AO present voltage value; when the option 3, D-19
displays the AO value of the output present current, corresponding to the present operating frequency.
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EM8 User's Manual
Code
Name
A-15
OC1 Output setting
A-16
OC2 Output setting
5.The Concrete Explanation of Function Parameters
Description
Factory setting
0: Inverter running
1: Frequency arrival
2: Frequency level detection signal(FDT)
3: Over-load alarm
4: External fault stop
5: Output frequency upper limit is
0
reached
6: Output frequency lower limit is
reached
7: Inverter under-voltage stop
8: Inverter is running at zero speed
9: In the running process of PLC
10: Finish after a running cycle of PLC
11: Finish after a running step of PLC
12: PLC end of running
13: Internal timer reaches the setting
time
1
14: Internal counter reaches peak value
15: Internal counter value reaches the
specified value
16: Upper limit of pressure alarm
17: Lower limit of pressure alarm
Definition open collector output terminal OC1, OC2 said: OC output terminals of the internal wiring
diagram as shown in diagram 5-6, or refer to chapter 2 of the OC terminal wiring.
Diagram 5-6: OC output terminal internal wiring
Remark
●When inverter connect extra inductive elements (such as relay coil), must parallel freewheeling diode.
0: Inverter running. When the inverter is running, the output signal (low level), a shutdown state outputs
an invalid signal (high resistance).
1: Frequency arrival.
When the inverter output frequency is close to the set frequency to a certain range (the range of parameters
is determined by b-58, [A- 0] = 0, fixed for 5.00Hz), output signal (low level), or outputs an invalid signal
(high resistance). Frequency of signal arrival as shown: 5-7.
42
5.The Concrete Explanation of Function Parameters
EM8 User's Manual
Remark
●If the external power supply, the best selection is DC 24V/50mA.
Diagram 5-7: Frequency arrival signals
2: Frequency level detection signal(FDT) When the inverter output frequency is more than FDT
frequency level, after set delay time, the output signal (low level), when the inverter output frequency is
lower than the FDT frequency level, after the same delay time, outputs an invalid signal (high resistance).
Frequency level detection (FDT) is as shown in Diagram 5-8:
Diagram 5-8: Frequency level detection (FDT)
Remark
● The level of FDT is set by parameter b-59, [A-0] = 0, fixed 10.0Hz.
● The delay time is set by the parameter b-60, [A-0] = 0, fixed for 2 seconds.
3: Over-load alarm. When the inverter output current exceeds the overload alarm level, after the set alarm
delay time, inverter outputs a signal (low level). When the inverter output current is lower overload alarm
level, after the same delay time, inverter outputs an invalid signal (high resistance). Overload alarm
diagram is as shown in diagram 5-9:
Diagram 5-9: Schematic diagram of overload alarm
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EM8 User's Manual
5.The Concrete Explanation of Function Parameters
Remark
● Overload alarm level set by parameter b-61, when [A-0] = 0,the fixed is 110%.
● The alarm delay time is set by parameter b-62, when [A-0] = 0,fixed is 2s
4: External fault stop: When the inverter external fault input signal will result in inverter shutdown, the
port output signal (low level), or outputs an invalid signal (high resistance).
5: Output frequency upper limit is reached: When the inverter output frequency reached upper limit, the
port outputs valid signal (low level), or outputs an invalid signal (high resistance).
6: Output frequency lower limit is reached: When the inverter output frequency reached lower limit, the
port outputs valid signal (low level), or outputs an invalid signal (high resistance).
7: Inverter under-voltage stop: When the inverter DC BUS side voltage is lower than a specified value,
frequency inverter to stop running, at the same time this port output signal (low level).
8: Inverter is running at zero speed. When the inverter output frequency is 0, but there is output voltage
(such as DC braking, reversing process dead-time), the port output signal (low level).
9: In the running process of PLC. Programmable multi-step speed running, the port output signal (low
level)
10: Finish after a running cycle of PLC. When the PLC finishes running a period, this port output an
effective pulse signal of 0.5seconds width (low level).
11: Finish after a running step of PLC. Using programmable multi-step speed, frequency inverter finish
each section of speed, this port output a effective pulse signal of 0.5seconds width (low level), refer to
diagram 5-27, 5-28.
12: PLC end of running: When the programmable multi step speed running cycle at the end, the port
output effective pulse signal of 0.5seconds width (low level).
13: Internal timer reaches the setting time: When the inverter internal timer timing time arrived, the port
output a effective pulse signal of 0.5seconds width of (low level).
14: Internal counter reaches peak value: Please refer to C-12 parameter description.
15: Internal counter value reaches the specified value: Please refer to C-13 parameter description
16: Upper limit of pressure alarm: When the feedback pressure is greater than the upper limit of pressure
alarm set value ([C-64]), and the output frequency of the inverter has reached the lower frequency running
(in multiple pump system, other pump has stopped), the port output signal (low level), this function can be
used to indicate the pipeline plug situation of water supply.
17: Lower limit of pressure alarm: When the feedback pressure is smaller than the lower limit of pressure
alarm set value ([C-63]), and the output frequency of the inverter has reached the upper limit frequency of
running (in multiple pump system, other pumps have been in power frequency running), this port output
signal (low level), this function can be used for indicating water pipe leakage.
Code
Name
Description
Factory setting
A-17
REV/JOG key
function selection
0: REV control;
1: Jog Control
0
0: Reverse control: Setting [A-17]=0, the key
is reverse running command when control mode
([b-3]=0).
1: JOG control: Setting [A-17]=1, the key
is JOG running command , press this key, inverter will
JOG running according to set frequency of (L-15).
5.2 Intermediate running parameters (Group B)
Code
b-0
Name
V/F curve type
selection
Description
0: Constant torque curve
1: Decreasing torque curve 1
2: Decreasing torque curve 2
Factory setting
0
44
5.The Concrete Explanation of Function Parameters
EM8 User's Manual
0: Constant torque curve: The inverter output voltage and the output frequency is proportional to the load,
for the majority, by this way.
1: Decreasing torque curve 1: The inverter output voltage and the output frequency is quadratic curve,
suitable for fan and water pump.
2: Decreasing torque curve 2: The inverter output voltage and the output frequency is quadratic curve,
suitable for fan and water pump. If the light load running is instable, please switch to decreasing torque
curves 1.V/F curve as diagram 5-10 shown:
Diagram 5-10: V/F curve
Code
b-1
Name
Description
Torque boost
0~20%
Factory setting
*
Used to improve inverter torque at low frequency; and in the low-frequency running to improve the output
voltage of the inverter, torque boost diagram is as shown in Diagram 5-11:
Improvement voltage=[b-1]/200* motor rated voltage
a) Decreasing torque boost curve diagram:
b) Constant torque boost curve diagram:
Diagram 5-11: Torque boost
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EM8 User's Manual
5.The Concrete Explanation of Function Parameters
Remark
● Torque boost setting value is too high, may appear over current protection, or cannot start normally.
Code
b-2
Name
Torque boost mode
Description
0: Manual
1: Auto
Factory setting
0
0: Manual boost: Torque boost voltage entirely set by parameter [b-1], which is characterized by the fixed
boosted voltage, light-load motor easily meets magnetic saturation.
1: Automatic torque boost: Torque boost voltage is changed with the stator current, the stator current is
the greater the boosted voltage is greater.
Automatic torque boost can prevent the motor at light load improved over voltage cause the magnetic
saturation, thereby avoiding motor overheat phenomenon operating at a low frequency.
Code
b-3
Name
Upper limit frequency
Description
Lower limit frequency ~500.0 Hz
Factory setting
50.00
(fu) represents frequency upper limit value in following description:
Code
Name
Description
Factory setting
b-4
Lower limit frequency
0.0~Upper limit frequency
0.50
b-5
Lower limit frequency
running mode
0: Stop
1: Run as the lower-limit frequency
0
(fL) represents frequency upper limit value in following description:
When the actual setting frequency is less than the frequency lower limit, inverter will reduce the output
frequency, arrived at the lower frequency, according to the lower limit running mode to determine the
steady output. If the lower frequency running mode selection for 0 (stop mode), inverter will continue to
reduce the output frequency to stop, if lower frequency running mode selection 1 (running mode), inverter
will run according to the frequency of lower limit.
Under the stop mode ([b-5] = 0) , the inverter work at the lower frequency mode as shown in diagram 5-12:
Diagram 5-12: The lower limit frequency running mode under Stop mode ([b-5]=0)
Code
b-6
Name
Start mode
Description
0: Start up from start freq
1: First brake, then restart
2: Speed inspection startup
Factory setting
0
46
5.The Concrete Explanation of Function Parameters
EM8 User's Manual
0: Start up from start frequency. After receiving startup command, the inverter will firstly run according
to preset start frequency(set by b-7),and after the duration time of start frequency(set by b-8),and then run
to set frequency according to acceleration or deceleration time.
1: First brake, then restart. Frequency inverter exerts a DC braking energy to load motor (i.e.,
electromagnetic brake, set by parameters B-9, B-10), and then restart, which is applicable to the small
inertia load, that stop state has the positive rotation or inversion phenomenon in.
2: Speed inspection startup. Frequency inverter firstly detects the motor speed, and then with the detected
speed as a starting point, to start motor to the set frequency according to acceleration and deceleration time.
Code
b-7
Name
Description
Start frequency
0.0~10.00Hz
Factory setting
0.50
Start frequency can be matched with the torque boost function and optimally adjust the starting torque
characteristics, but if the set value is too large, sometimes over current fault. Start Frequency continuous
time means the starting frequency operating duration time. If the "Set Frequency" is lower than the "Start
Frequency", the inverter firstly start according to Start Frequency, after reaching the continuous time, then
according to the preset deceleration time falls down to the Set Frequency. Start frequency starting as shown
in diagram 5-13:
Diagram 5-13: Start according to preset start frequency
Code
Name
Description
Factory setting
b-8
Duration time at start
frequency
0.0~20.0s
0.0
b-9
DC brake voltage at start
0~15%
0
b-10
DC brake time at start
0.0~20.0s
0
When the start mode set for the first brake, then start, the DC braking function of starting is valid. The
parameter set for corresponding to the DC braking voltage and duration time. when DC braking, the
inverter output DC voltage and DC braking start relationship is as shown in diagram 5-14.
Diagram 5-14: DC braking starting mode
47
EM8 User's Manual
Code
b-11
Name
5.The Concrete Explanation of Function Parameters
Description
0: Deceleration stop mode:
1: Free stop mode
Stop mode
Factory setting
0
0: Deceleration stop mode: Inverter stops according to deceleration time decrease and stop.
1: Free stop mode: Inverter cut off output and motor free stop.
Under free stop mode,if inverter restart the running motor from zero Hz, may occur with over current or
overvoltage protection, this time please set [b-6] parameter to 2, inverter will firstly detect the speed and
then start.
Code
Name
Description
Factory setting
b-12
The starting frequency of
DC braking stop
0.0~15.00Hz
3.00
b-13
The action time of DC
braking stop
0.0~20.0s
0.0
b-14
The voltage of DC
braking stop
0~15%
5
These 3 parameters are used to define the frequency inverter in DC braking function of stopping. when the
inverter output frequency is lower than the starting frequency of DC braking, inverter will automatically
start the DC braking function.
DC braking action time means the duration time of DC braking. When this parameter set to 0, the DC
braking function is invalid. The inverter output DC voltage of DC braking is like following formula:
Boost voltage =
[ -14]
200 x Motor rated voltage
DC braking function can provide torque at zero speed, usually used to improve the accuracy of stopping,
but cannot use for braking of deceleration at normal running. DC braking at stopping function is as shown
in Diagram 5-15:
Remark
● If DC braking voltage set too high, inverter is easy to over current fault.
Diagram 5-15: DC braking functions at stopping
Code
Name
Description
Factory setting
b-15
Jog frequency
0.0~Upper Limit frequency
10.00
b-16
Jog acceleration time
0.1~6000s
10.0
b-17
Jog deceleration time
0.1~6000s
10.0
48
5.The Concrete Explanation of Function Parameters
EM8 User's Manual
Jog frequency having the highest priority. Inverter in any state, as long as there is JOG input, inverter
immediately turn to JOG running according to acceleration and deceleration time.
Diagram 5-16: JOG running
Code
Name
Description
Factory setting
b-18
Multi-speed frequency 1
0.0~Upper limit frequency
35.00
b-19
Multi-speed frequency 2
0.0~Upper limit frequency
15.00
b-20
Multi-speed frequency 3
0.0~Upper limit frequency
3.00
b-21
Multi-speed frequency 4
0.0~Upper limit frequency
20.00
b-22
Multi-speed frequency 5
0.0~Upper limit frequency
25.00
b-23
Multi-speed frequency 6
0.0~Upper limit frequency
30.00
b-24
Multi-speed frequency 7
0.0~Upper limit frequency
35.00
b-25
Multi-speed frequency 8
0.0~Upper limit frequency
40.00
b-26
Multi-speed frequency 9
0.0~Upper limit frequency
45.00
b-27
Multi-speed frequency 10
0.0~Upper limit frequency
50.00
b-28
Multi-speed frequency 11
0.0~Upper limit frequency
40.00
b-29
Multi-speed frequency 12
0.0~Upper limit frequency
30.00
b-30
Multi-speed frequency 13
0.0~Upper limit frequency
20.00
b-31
Multi-speed frequency 14
0.0~Upper limit frequency
10.00
b-32
Multi-speed frequency 15
0.0~Upper limit frequency
5.00
These parameters are used to set output frequency of multi-step speed control by terminal control or
program. Multi-step speed control is priority is lower than jog frequency control, but is higher than other
frequency control mode.
The below column is corresponding multi-step speed frequency decided by combination style of multi-step
speed terminals. Wherein, multi-step speed terminal corresponding 1 is high level, corresponding 0 is low
level. Multi-step speed frequency set by parameters (b-18 to b-32).
49
EM8 User's Manual
Terminal 1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Terminal 2
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Terminal 3
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
5.The Concrete Explanation of Function Parameters
Terminal 4
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Multi-step terminal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Diagram 5-17: Multi-step running diagram
Multi-step control terminals were set by parameter b-63~b-69,the factory setting:X1,X2,X3 were Used for
multi-step speed control terminals.
The deceleration time of external terminal control section can be set separately, respectively corresponding
to:
Multi speed
ACC/DEC Time
Speed 1
Step 1 Acc/Dec time (C-17)
Speed 2
Step 2Acc/Dec time(C-20)
Speed 3
Step3Acc/Dec time(C-23)
Speed 4
Step 4Acc/Dec time(C-26)
Speed 5
Step 5Acc/Dec time(C-29)
Speed 6
Step 6Acc/Dec time(C-32)
Speed 7
Step 7Acc/Dec time(C-35)
Speed 8
Acc/Dec time1(A-7,A-8)
Speed 9
Acc/Dec time2(C-42,C-43)
Speed 10
Acc/Dec time3(C-44,C-45)
Speed 11
Acc/Dec time4(C-46,C-47)
Speed 12
Acc/Dec time1(A-7,A-8)
50
5.The Concrete Explanation of Function Parameters
Multi speed
EM8 User's Manual
ACC/DEC Time
Speed 13
Acc/Dec time1(A-7,A-8)
Speed 14
Acc/Dec time1(A-7,A-8)
Speed 15
Acc/Dec time1(A-7,A-8)
The running mode, direction, and time of programmable multi-step speed can be set by parameter
C-14~C-35.
This parameter is used to set external command control mode.
Code
Name
Description
b-33
External running
command mode selection
0: Two-line control mode 1
1: Two-line control mode 2
2: Three-line control mode
Factory setting
0
Remark
● Only set external control [A-3] = 1,2, this parameter is valid.
0: Two-line control model 1 (Inverter factory setting is this mode)
Command
Terminal state
Stop
Forward
Reverse
1: Two-line control model 2
Command
Terminal state
Stop
Run
Forward
Reverse
2: Three-line control model: Three line control mode must choose a terminal of three line (refer to
b-63~b-69 explanation).
The wiring of three control model as diagram 5-18:
Diagram 5-18: The wiring of three control mode
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EM8 User's Manual
5.The Concrete Explanation of Function Parameters
X* is three line control terminal, parameter b-63~b-69 to select input terminal one terminal X1~X7, for
example: select terminal X1,the wiring is as following diagram:
Forward
Reverse
Stop
XI
XI
FWD
REV
COM
COM
Stop
XI
XI
FWD
FWD
REV
REV
COM
COM
Trigger switch function explanation:
1. SW2~forward trigger switch
2. SW3~reverse trigger switch
3. SW1~inverter stop trigger switch
Code
Name
Description
Factory setting
b-34
V1 Input lower-limit
voltage
0.00V~[b-35]
0.00
b-35
V1 Input upper-limit
voltage
[b-34]~10.00V
10.00
b-36
V1 Input adjustment
coefficient
0.01~5.00
1.00
These parameters are used to define the range of analog voltage input (VI1) according to input signal.
Input adjustment coefficient is used to adjust input voltage,In the combinatorial set mode can change the
channel weight coefficient.
Code
Name
Description
Factory setting
b-37
V2 Input lower-limit
voltage
-10.0V~[b-38]
0.0
b-38
V2 Input upper-limit
voltage
[b-37]~10.0V
10.0
b-39
V2 Input adjustment
coefficient
0.01~5.00
1.00
These parameters are used to define the range of analog voltage input (V2) according to input signal.
Input adjustment coefficient is used to adjust input voltage,In the combinatorial set mode can change the
channel weight coefficient.
Code
Name
Description
Factory setting
b-40
V2 Input zero offset
-1.00~1.00V
0.0
b-41
V2 Input bipolar control
0: Invalid
1: Valid
0
b-42
V2 Input bipolar control
zero relay width
0.00~1.00V
0.20
These parameters were used to set bipolar control function of voltage input channel (V2).
Bipolar control means to control inverter output phase sequence, which is controlled by input voltage
V2,and ignore other direction command. When VI2 > 0, inverter output forward phase sequence, motor
forward runs; when output voltage V2 < 0, inverter output reverse phase sequence, and motor reverse runs.
The bipolar control function is valid after setting frequency channel V2([A-1] = 3),and then the frequency
setting value is decided by the absolute value of V2. In a single polarity control([b-41] = 0)and in bipolar
control([b-41] = 1), The relationship of VI and setting frequency as diagram 5-19 and diagram 5-20 shown.
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5.The Concrete Explanation of Function Parameters
EM8 User's Manual
Diagram 5-19: The relationship between single polarity control V2 ([b-41] = 0)and setting frequency
Diagram 5- 20: The relationship between bipolar control V2 ([b-41]=1) and setting frequency
In single polarity control, V2 input lower-limit voltage [b-37] can be greater than 0,also can smaller than 0,
The linear relationship with output frequency is no change, Diagram 5-19 shown [b-37] < 0, inverter output
phase sequence by external terminal or panel instruction determine.
In bipolar control, parameter b-49 is invalid (default for 0), when V2 > 0, the input voltage of V2 within
0~[b-38] is linear relationship with frequency within 0.0Hz~[b-50], inverter output forward phase sequence.
WhenVI2 < 0, the input voltage of V2 within 0~[b-37] is linear relationship with frequency 0.0Hz~[b-50],
inverter output reverse phase sequence. Parameter [b-42] set hysteresis loop width of phase sequence in
zero voltage point.
Although inverter set to bipolar control mode, the input upper or lower limit of V2 was set to same polar
(parameter b-37,b-38 > 0 or < 0 simultaneous), the bipolar control is invalid.
Parameter [b-40] is used to adjust dead-center position of V2 input voltage that is useless in single polarity
control.
Code
Name
Description
Factory setting
b-43
Input lower-limit current
0.00mA~[b-44]
4.00
b-44
Input upper-limit current
[b-43]~20.0mA
20.0
b-45
Input adjustment
coefficient
0.01~5.00
1.00
To define analog input current channel II range. According to the actual situation of access signal set
The correction coefficient can correct input current; inverter in the combined set mode can change the
channel weight coefficient.
Code
53
Name
Description
Factory setting
b-46
Pulse input lower-limit
frequency
0.000KHz~[b-47]
0.000
b-47
Pulse input upper-limit
frequency
[b-46]~50.00KHz
10.00
EM8 User's Manual
Code
b-48
Name
Pulse input adjustment
coefficient
5.The Concrete Explanation of Function Parameters
Description
0.01~5.00
Factory setting
1.00
To define pulse frequency range of pulse input channel, according to the actual situation of access signal set.
The correction coefficient can correct pulse input frequency, inverter in the combined set mode can change
the channel weight coefficient.
Code
Name
Description
Factory setting
b-49
Inputting lower-limit
equal to set frequency
00.0~Upper-limit frequency
0.00
b-50
Inputting upper-limit
equal to set frequency
00.0~Upper-limit frequency
50.00
These parameters are used to set relationship between external input signal and setting frequency.
External input signal includes: Input voltage V1, input voltageV2, input current I and external pulse, their
input upper and lower limit set by parameter: b-34~b-47, the minimal analog input corresponding setting
frequency (fmin) means the corresponding setting frequency of analog input lower limit value, the maximal
analog input corresponding setting frequency (fmax) means the corresponding setting frequency of analog
input upper limit value. The relationship between input value and setting frequency is as diagram 5-21
shown:
Diagram 5-21: The relationship between input value and setting frequency
Code
b-51
Name
Running monitor item
selection 2
Description
0~19
Factory setting
1
The parameters are used to determine the panel second display item under inverter monitoring state, please
refer to following parameters list of monitoring state for items of selection.
Code
b-52
Name
Running monitor item
selection 3
Description
0~19
Factory setting
2
The parameters are used to determine the panel third display item under inverter monitoring state, please
refer to following parameters list of monitoring state for items of selection.
54
5.The Concrete Explanation of Function Parameters
Parameters list of monitoring state
Code
EM8 User's Manual
Content
Unit
Code address
d-0
Inverter present output frequency
Hz
DBH
d-1
Inverter present output current
A
DCH
d-2
Inverter present output voltage
V
DDH
d-3
Present motor speed
Rpm
DEH
d-4
Inverter present set frequency
Hz
DFH
d-5
DC BUS voltage
V
E0H
d-6
PID set value
%/MPA
E1H
d-7
PID feedback value
%/MPA
E2H
d-8
Running linear speed
E3H
d-9
Setting linear speed
E4H
d-10
Input AC voltage
V
E5H
d-11
Temperature of IGBT
o
C
E6H
d-12
Total running time
H
E7H
d-13
Input terminal state
d-14
Analog input V1
V
E9H
d-15
Analog input V2
V
EAH
d-16
Analog input I
mV
EBH
d-17
External pulse input
KHz
ECH
d-18
AO output
V
EDH
d-19
AO output
E8H
EEH
Remark
● b-51,b-52 and b-71 is for the selection of monitoring items, the user can according to their need to set the
frequency inverter at run time set mostly want to see three monitoring states, and can use Shift keys to
switch between the three running states monitoring project.
Code
b-53
Name
Running monitor item
recycle quantity
Description
1~3
Factory setting
3
The parameter is used to set circle monitoring states number, the max is three monitoring states. When
[b-53] set to 1, the monitoring state always is [b-71] set state, when [b-53] set to 2 or 3, the monitoring state
is circle display of monitoring states set by [b-71],[b-51 and [b-52].
Code
b-54
Name
Stop monitor item
selection
Description
0~19
Factory setting
0
The parameter is used to select monitoring item of stopping, the items list please refer to parameters list of
monitoring state.
Code
b-55
Name
Analog input channel
filter time constant
Description
0.01~5.00s
Factory setting
0.20
When set frequency by external analog channel or panel potentiometer, this parameter is used to set
inverter internal filter time constant of analog signal. When the cable is longer or be serious interference,
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EM8 User's Manual
5.The Concrete Explanation of Function Parameters
leading to set frequency instability, user can improve the signal quality by increasing the filter time
constant.
Code
Name
b-56
Frequency input channel
combination
Description
Refer to the detailed description of
function
Factory setting
101
The setting frequency of inverter is decided by linear combination of many channels of input.
The parameter is only valid under frequency channel chose "combination setting"([A-1] = 8).
This parameter hundred digit decide the combination mode of two channels, the value of ten digit and unit
digit decide the signal source of first channel and second channel. User through the combination of hundred
and ten and unit digit value to set frequency. Example as following:
LED hundred digital defines to combination mode, there are six combination style(1~6):
1: First channel + second channel
2: First channel - second channel
3: First channel * second channel
4: Take bigger value of two channels
5: Take smaller value of two channels
6: Two channel nonzero value effectively, the first channel priority
LED ten digit is defined as the first channel input form, it was divided into analog channel and the digital
channel, this is seven forms :( 0~6)
Analog channel:
0: Potentiometer
1: External voltage signal 1
2: External voltage signal 2
3: External current signal
4: External pulse signal
Digital channel:
5: Panel digital setting
6: RS485 interface
LED unit digit is defined as second channel input form, it was divided into analog channel, and digit
channel, here is seven forms :( 0~6)
Analog Channel:
0: Panel potentiometer
1: External voltage signal 1
2: External voltage signal 2
3: External current signal
4: External pulse signal
Digital Channel:
5: Panel digital setting
6: RS485 interface
Remark
● When choosing analog channel (0 to 4), the analog of zero calibration represent 0Hz, the analog quantity
of full scale represent frequency 50Hz, for example: external voltage signal 1, its input 0V represent 0Hz,
its input 10V representative frequency 50Hz, and for strict linear relationship.
Eg: When [b-56] set 123, the input frequency of combination: external voltage signal 2(Channel 1)
+External current signal (Channel 2).
When combination mode of input frequency (LED hundred digital) set to 3(channel 1*channel 2 mode) this
time, the channel 1 is basic set frequency, the channel 2 is scale factor.
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5.The Concrete Explanation of Function Parameters
EM8 User's Manual
Set frequency=Channel 1 set frequency* Kx(scale factor of channel 2).
When choose input analog channel 2 (parameter set 0~4),The scale factor calculation is as:
Kx=Inx*Ax
Kx: Channel 2 scale factor
Inx: Input analog set value (when input analog signal inputs full-scale value, Inx is 100.00%. For example,
set parameter to 1(external voltage signal 1), when input analog signal is 10V, Inx is 100.00%).
Ax: Analog channel gain (The corresponding parameters for adjusting analog channel (0~4) gain is as
following:
0: Panel potentiometer: [C-84]
1: External voltage signal 1: [b-36]
2: External voltage signal 2: [b-39]
3: External current signal: [b-45]
4: External pulse signal: [b-48]
For example: When [b-56] set to 310, the combination input of set frequencies (channel 1*channel 2), the
channel 1(basic frequency set) is external voltage signal 1; the channel 2 is 0; the corresponding gain
parameter C-84 is 3.24, the scale factor of channel 2: Kx= Inx*324.00%, this means range of Kx is
0~324.00%. And then, the combined input frequency: External voltage signal 1*Kx, that is(V1 terminal set
frequency) *(0~324.00%).
When choose digital input (parameter set 5~6 to choose channel 2), the relationship between pulse input
and gain factor is as following diagram 5-22:
Diagram 5- 22: Digital quantity and gain corresponding relation
Fox example: When [b-56] set 315, the combination set frequency is( channel 1* channel 2), the channel 1
(basic frequency set) is external voltage signal 1, the channel 2 is 5(set by panel), panel digital set is 23.00,
it means the scale factor of channel 2 is 230.00%. The combination set input frequency is (External voltage
signal 1)*230.00 %( Hz ).
Code
b-57
Name
Carrier frequency
Description
1.5~15KHz
Factory setting
*
Carrier frequency is main influence in running of the audio noise and heating effect.
When the environment temperature is higher, motor load heavy, should be appropriately reduced carrier
frequency to improve thermal characteristics of the frequency inverter.
Code
b-58
Name
Frequency reach
checkout amplitude
Description
0. 00~20.00Hz
Factory setting
5.00
This parameter is complementary for frequency reach output signal, when the inverter output frequency is
near preset frequency within the detecting range, the output terminal(OC1 and OC2)will output valid
signal(refer to diagram 5-7 and explanation of parameter A-15,A-16).
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EM8 User's Manual
Code
Name
5.The Concrete Explanation of Function Parameters
Description
Factory setting
b-59
FDT (frequency reach
detection)
0.00~Upper-limit freq
10.00
b-60
FDT output delay time
0.0~20.0s
2.0
The parameter is used to inspect inverter frequency and output a signal, when output frequency reach
setting value of FDT, after the [b-60] set delay time, open collector terminal output a valid signal(OC1or
OC2 terminal, please refer to diagram 5-8 and explanation of parameter A-15,A-16).
Code
Name
Description
Factory setting
b-61
Over-load alarm level
50~200%
110
b-62
Over-load alarm delay
time
0.0~20.0s
2.0
If the inverter output current surpass [b-61] set value, after the [b-62] delay time, open collector terminal
output a valid signal(OC1or OC2 terminal, please refer to diagram 5-9 and explanation of parameter
A-15,A-16).
Code
Name
b-63
Input terminal 1 function
selection (X1: 0~28)
b-64
Input terminal 2 function
selection (X2: 0~28)
b-65
Input terminal 3 function
selection (X3: 0~28)
b-66
Input terminal 4 function
selection (X4: 0~28)
b-67
Input terminal 5 function
selection (X5: 0~28)
b-68
Input terminal 6 function
selection (X6: 0~29)
b-69
Input terminal 7 function
selection (X7: 0~30)
Description
0: Control terminal is idle
1: Multi-speed control terminal 1
2: Multi-speed control terminal 2
3: Multi-speed control terminal 3
4: Multi-speed control terminal 4
5: FWD Jog control
6: REV Jog control
7: Free stop control
8: External device fault input
9: Acc & Dec time selection terminal 1
10: Acc & Dec time selection terminal 2
11: Freq ascending control (UP)
12: Freq descending control (DW)
13: Freq setting channel selection
terminal 1
14: Freq setting channel selection
terminal 2
15: Freq setting channel selection
terminal 3
16: Simple PLC pause
17: Three-line running control
18: DC brake control
19: Internal timer trigger terminal
20: Internal timer reset terminal
21: Internal counter clear terminal
22: Closed-loop control invalid
23~28: Reserved
29:Internal counter clock terminal
30. External pulse input
Factory setting
1
2
3
4
6
0
30
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5.The Concrete Explanation of Function Parameters
EM8 User's Manual
These parameters are used to select functions of programmable input terminal X1~X7, as following:
Set value
Terminal function
0
No function
1
Multi-step speed 1
2
Multi-step speed 2
3
Multi-step speed 3
4
Multi-step speed 4
5
Forward JOG
6
Reverse JOG
7
Free stop
8
External equipment fault input
9
Acceleration/Deceleration time selection 1
10
Acceleration/ Deceleration time selection 2
11
Increase frequency (UP)
12
Decrease frequency (DW)
13
Set frequency channel 1
14
Set frequency channel 2
15
Set frequency channel 3
16
Simple PLC pause control
17
Three line type run control
18
DC brake control
19
Internal timer trigger terminal
20
Internal counter reset terminal
21
Internal counter zero clearing terminal
22
Closed-loop control failure
23-28
Reserve
29
Internal counter clock terminal
30
External pulse input
Remark
● With external terminal to realize free stopping control (terminal function 7), when user withdraw the
external free the stop signal, the inverter will recover running with inspecting speed restart way.
Code
b-70
Name
Linear speed coefficient
setting
Description
0.01~100.0
Factory setting
1.00
This parameter decided to display numerical of running linear speed and setting linear speed, used to
display other physical quantities being proportional with output frequency.
Running linear speed (d-8)=[b-70]×output frequency(d-0)
Set linear speed (d-9)=[b-70]×set frequency(d-4)
When actual display value ≥ 10000, Least significant point light, said a 0 , for example "1234" means
12340.
Code
b-71
59
Name
Monitor item selection
Description
0~19
Factory setting
0
EM8 User's Manual
5.The Concrete Explanation of Function Parameters
The parameters are used to determine the running panel display content in the monitoring mode and on
inverter just power on moment, please refer to the monitoring state parameter list.
Code
b-72
Name
Parameter revise
protection
Description
0: All parameters are allowed to be
revised
1: Prohibit to revise all parameters
except for parameter [b-72]
2: Prohibit revise all parameters
Factory setting
0
This function is used to prevent parameter error modification.
0: All parameter can be revised.
1: Only digital set frequency (A-2) and b-72 can be revised.
2: Only b-72 parameter can be revised, other all parameter locked.
All parameter locked, if user try to revise parameter, inverter will display "--".
Remark
● When [b-72] is 0, all parameters can be revised, but when inverter is running, some parameter also
cannot be revised, and will show "--" for revise running, if user wants to revise the parameter, please stop
inverter.
Code
b-73
Name
Parameter initialization
Description
0: No action
1: Initialization action
2: Clear the fault records
Factory setting
0
This parameter is used to recover inverter all parameter to factory setting.
0: No action.
1: Recover all parameter to factory setting.
2: Clear all fault record.
Remark
● Parameter [A-0],[A-1],[A-3],[A-14] cannot be recover to factory setting.
5.3 Advanced running parameter (Group C)
Code
C-0
Name
Slip frequency
compensation
Description
0~150%
Factory setting
0
With this parameter, we can adjust the inverter's output frequency according to the actual load, so as to
compensate for the slip frequency of the asynchronous motor dynamically, keeping a desired motor speed.
When working with Automatic Torque Boost function, it will deliver even better low speed torque
performance. Slip frequency compensation is shown as diagram 5-23.
When this parameter is set to 100(%), and the inverter delivers rated current:
Actual output frequency = set frequency + 2.50Hz.
While the output frequency reading isn’t changed. Default value for this parameter is set to 0, with slip
compensation invalid.
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5.The Concrete Explanation of Function Parameters
EM8 User's Manual
Diagram 5-23: Slip frequency compensation
Code
C-1
Name
Over-load & over-heat
protection mode
Description
0: Lock the output
1: Limit-current running(Alarm)
Factory setting
0
This parameter is used to control how the inverter is protected from overload/overheat.
0: Stop output immediately. When there is overload/overheat, the inverter will stop output immediately
and the motor will shutdown naturally.
1: Limit current (with warning).When there is overload/overheat, the inverter will still work but in a
limited way. This means that the inverter may decrease the output frequency to lower the current of the load,
and send out warning signal at the same time.
Remark
● Limit current mode is a protection measure of the inverter when there is overload/overheat, you can't set
a current level for this function.
● Even in limit current mode, the inverter will shut down when the temperature of the internal modules
overheat.
Code
C-2
Name
Motor over-load
protection
Description
50~110%
Factory setting
110
This parameter is used to control the sensitivity of the thermal relay protection for the motor in the inverter.
When rated current of the load motor is not matching that of the inverter, you can use this parameter to
provide appropriate thermal protection for the load motor. Electrical thermal relay protection is shown as
diagram 5-24.
Diagram 5-24: Electrical thermal relay protection
Default overload value of the inverter is set as:
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EM8 User's Manual
5.The Concrete Explanation of Function Parameters
Model G: 150 %×rated current, 1 minute
Model P: 120 %×rated current, 1 minute
The setting value for this parameter is calculated as:
[C-2]=
Rated current of the motor
Rated output current of the inverter
×100
Remark
● When the inverter is working with several motors connected in parallel, the thermal relay protection will
not function. To get appropriate protection, you need to install a thermal protection relay to each motor's
inlet terminal.
Code
C-3
Name
Auto energy-saving
Description
0: Invalid
1: Valid
Factory setting
0
0: Invalid
1: Valid
When working in automatic power saving mode, the inverter will adjust the excitation state of the motor
according to how much the load is, keeping the motor function with the highest efficiency. With this
function, you will save great power when the load is changing frequently.
Code
Name
Description
Factory setting
C-4
Restart after power-off
0: Invalid
1: Valid
0
C-5
Waiting time for restart
after power-off
0~10s
5
This parameter is used to control whether the inverter will restart after a power failure and how much the
waiting time is.
When parameter C- 4 is set to 1, the inverter will stop instantly and restart after a power failure. If the
inverter is in running state before a power failure, when the power supply is restored, the inverter will
search the motor speed and restart in the waiting time set with C- 5. During this waiting time, the inverter
will not restart even if you give a run command, but if you give a shutdown command, it will no longer
search the motor speed and restart.
Remark
● As this function will automatically restart the inverter after power failure, it may lead to contingency. To
protect you and your devices, please use this function with caution.
Code
Name
Description
Factory setting
C-6
Fault self-restoring
0, 1, 2
0
C-7
Self-restoring interval
2~20s
5
When set to "0", the inverter will not self-recover after failure; when set to "1" or "2", it will try
self-recovery once or twice respectively after system failure.
Because load may vary in running, the inverter may malfunction and stop occasionally. To prevent it from
out of service, you can use the self-recovery function. The inverter will search the motor speed and restart
during a self-recovery. If it can't self-recover in a set attempt times, the inverter will shut down due to
fail-safe. When the set self-recovery attempt times are cleared, the function will be invalid.
The self-recovery function is not available to failures caused by overload/overheat.
62
5.The Concrete Explanation of Function Parameters
EM8 User's Manual
Remark
● To use self-recovery function, the inverter must has such function available and without any physical
faulty.
Code
C-8
Name
Auto stable voltage
Description
0: Invalid
1: Valid
2: Invalid only at deceleration
Factory setting
0
0: Invalid
1: Valid
The function Automatic Voltage Regulator is designed to make sure that the output voltage of the inverter is
stable. If the voltage from the power grid is surging greatly and you want a stable voltage in the motor, you
can use this function.
2: Invalid only when motor deceleration
When the motor is decelerating to a stall, if you disable the AVR, the deceleration time will be shorter, and
the running current will be higher; if you enable the AVR, the motor will decelerate stably, so the running
current will be lower, and the deceleration time will be longer.
Code
C-9
Name
Current-limit level
Description
110%~200%
Factory setting
150
This parameter is used to set the max current in acceleration of the inverter, which is called Stall Level.
During acceleration, when the output current of the inverter goes over this parameter, the inverter will
adjust the acceleration time linearly to keep the output current within this parameter.
This parameter is expressed as a percentage of the rated current of the inverter. Current limitation in
acceleration is shown as diagram 5-25.
Diagram 5- 25: Current limitation in acceleration
Remark
● During starting, if the frequency of the inverter can't be accelerated to the desired value, but maintaining
on a relatively stable range, this means that the current limitation mode is functioning, you need to reduce
load or adjust corresponding parameters.
Code
Name
C-10
FWD & REV dead time
Description
0.0~5.0s
Factory setting
0.1
This parameter is used to control how much time the inverter maintains on zero frequency when changing
rotation direction. Dead area between forward/reversal rotations is shown as diagram 5-26.
Forward/reversal rotation dead area time is generally set for loads that have great inertia and when there is
mechanical dead area while the system rotation direction changes.
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EM8 User's Manual
5.The Concrete Explanation of Function Parameters
Diagram 5- 26: Dead area time of changing rotation direction
Code
C-11
Name
Internal timer set value
Description
0.1~6000.0s
Factory setting
0.0
This parameter is used to set the clocking of the internal timer of the inverter. The internal timer is triggered
by an external signal which is set with parameters b-63~b-69. When the external signal is triggered, the
relative OC terminal will generate a valid pulse (which has a width of 0.5s) after a set time.
Code
Name
Description
Factory setting
C-12
Final value set of internal
counter
1~60000
1
C-13
Internal counter setting
1~60000
1
This parameter is used to control how the internal counter is working. The timer of the counter is set with
parameters b-68 and b-69.
When the counter reaches the value set with C-12 for an external timer, the corresponding OC terminal will
generate a valid pulse signal which has a width of the external timer period.
When the counter reaches the value set with C-13 for an external timer, the corresponding OC terminal will
generate a valid pulse signal. The counter will continue counting until reading is over the value set with
C-12, then it will be cleared, and the valid pulse signal will be released.
The clocking period of the counter must be more than 5ms, and the pulse width must be at least 2ms. The
internal counter is shown as diagram 5-27.
Diagram 5- 27: Internal counter
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5.The Concrete Explanation of Function Parameters
Code
EM8 User's Manual
Name
Description
Factory setting
C-14
Programmable
multi-speed running setup
LED Ten digital: simple PLC running
time unit:
1: Min
0:second
LED first digital: PLC running style:
0: No action
1: Single loop
2: Continuous loop
3: Keep the final value
4: Wobble freq running
5: Single loop stop mode
6: Continuous loop stop mode
7: Keep the final value stop mode
C-15
Step 1 running time
0.1~6000s
10.0
C-16
Step 1 running direction
0: FWD
1: REV
0
C-17
Step 1 Acc/Dec time
0.1~6000s
10.0
C-18
Step 2 running time
0.0~6000s
10.0
C-19
Step 2 running direction
0: FWD
1: REV
0
C-20
Step 2 Acc/Dec time
0.1~6000s
10.0
C-21
Step 3 running time
0.0~6000s
10.0
C-22
Step 3 running direction
0: FWD
1: REV
0
C-23
Step 3 Acc/Dec time
0.1~6000s
10.0
C-24
Step 4 running time
0.0~6000s
10.0
C-25
Step 4 running direction
0: FWD
1: REV
0
C-26
Step 4 Acc/Dec time
0.1~6000s
10.0
C-27
Step 5 running time
0.0~6000s
10.0
C-28
Step 5 running direction
0: FWD
1: REV
0
C-29
Step 5 Acc/Dec time
0.1~6000s
10.0
C-30
Step 6 running time
0.0~6000s
10.0
C-31
Step 6 running direction
0: FWD
1: REV
0
C-32
Step 6 Acc/Dec time
0.1~6000s
10.0
C-33
Step 7 running time
0.0~6000s
10.0
C-34
Step 7 running direction
0: FWD
1: REV
0
C-35
Step 7 Acc/Dec time
0.1~6000s
10.0
0
These parameters are used to set programmable multi-step running (simple PLC running), which has
priority over multi-step running that is controlled with external terminal.
Parameters C-15~C-35 are used to define the running time, direction and acceleration/deceleration time of
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5.The Concrete Explanation of Function Parameters
each step in the programmable multi-step running.
When programmable multi-step function is valid, these parameters are valid ([C-14] ≠ 0).
Parameter C-14 defines how the programmable multi-step is working:
Tens-digit of the LED: Time unit of simple PLC running.
1: Minute
0: Second
Ones-digit of the LED: Running mode of the PLC.
*0: Programmable multi-step running is invalid.
*1: Single cycle. When get running command, the inverter will run with multi-step 1 ( set with b- 18),
whose running time is set with parameter C-15. After a set running time, the inverter will go on to the next
step. You can set the running time for each step. When all 7 steps are finished, the inverter will output 0
frequency. If you set zero running time for a step, it will be skipped in running.
*2: Continuous cycle. The inverter will go back to step 1 and continuously running in cycle after all 7
steps are finished.
*3: Keep last step. After the single cycle, the inverter will keep running with the last step whose running
time is non-zero rather than stop. Keep last step mode is shown as diagram 5-28.
*4: Swing frequency. The inverter changes the frequency according to a preset acceleration/deceleration
time periodically. This function is especially useful in textile industry, in which the system needs to change
the rotation speed according to the changing spool diameter. Swing frequency running is shown as diagram
5-29.
*5: Single cycle and stop. After every step, the inverter will decelerate to zero frequency and then
accelerate to the frequency required in the next step, while other running is the same as mode 1. Single
cycle and stop mode is shown as diagram 5-30.
*6: Continuous cycle and stop. After every step, the inverter will decelerate to zero frequency and then
accelerate to the frequency required in the next step, while other running is the same as mode 2.
*7: Keep last step and stop. After every step, the inverter will decelerate to zero frequency and then
accelerate to the frequency required in the next step, while other running is the same as mode 3.
Diagram 5-28: Keep last step (mode 3)
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5.The Concrete Explanation of Function Parameters
EM8 User's Manual
Diagram 5-29: Single cycle and stop (mode 5)
Parameters of the running curve in diagram 5-28 and 5-29 are set as: [C-14]= 3, keep last step mode
[C-27]= 0, [C-33 ]= 0, running time for step 5 and step 7 is 0, so these two steps are skipped in the curve.
Diagram 5-30: Swing frequency running (mode 4)
Code
Name
Description
Factory setting
C-36
Jump frequency 1
0.00~Upper-limit frequency
0.00
C-37
Amplitude of jump
frequency 1
0.00 ~5.00Hz
0.00
C-38
Jump frequency 2
0.00~Upper-limit frequency
0.00
C-39
Amplitude of jump
frequency 2
0.00 ~5.00Hz
0.00
C-40
Jump frequency 3
0.00~Upper-limit frequency
0.00
C-41
Amplitude of jump
frequency 3
0.00 ~5.00Hz
0.00
While mechanical resonance may happen at a certain frequency on the load connected to the inverter, you
can avoid it with jump frequency.
You can choose from 3 kinds of jump frequency. If this parameter is set to 0, jump frequency function is
invalid.
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EM8 User's Manual
5.The Concrete Explanation of Function Parameters
Diagram 5-31: Hopping frequency and its amplitude
Remark
● Hopping frequency means that the inverter will not running on certain frequency stably, but will use it
during acceleration and deceleration.
Code
Name
Description
Factory setting
C-42
Acceleration time 2
0.1~ 6000s
*
C-43
Deceleration time 2
0.1~ 6000s
*
C-44
Acceleration time 3
0.1~ 6000s
*
C-45
Deceleration time 3
0.1~ 6000s
*
C-46
Acceleration time 4
0.1~ 6000s
*
C-47
Deceleration time 4
0.1~ 6000s
*
Setting values for the 2nd, 3rd and 4th acceleration time. Actual acceleration/deceleration time is set with
external terminal.
Diagram 5-32: Acceleration/deceleration time control
Acceleration/deceleration time controlling is shown as diagram 5-32. Acceleration/deceleration time of
multi-step running and push-to-run running is controlled with the relative setting parameters rather than
external terminal. Please refer to the description of relative parameters for details.
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5.The Concrete Explanation of Function Parameters
Code
C-48
Name
Built-in PID control
EM8 User's Manual
Description
0: No PID control
1: Normal PID control
2: Constant-pressure water-supply PID
3: Double-pump constant pressure
water-supply PID (Need accessory)
4: Triple-pump constant pressure
water-supply PID (Need accessory)
5: Four-pump constant pressure
water-supply (Need accessories)
Factory setting
0
0: PID control invalid.
1: Conventional PID control.
2: PID control for constant pressure water supply system with single pump.
3: PID control for constant pressure water supply system with dual pumps.
4: PID control for constant pressure water supply system with three pumps.
5: PID control for constant pressure water supply system with four pumps.
When working with mode 3, 4 and 5, you need to purchase dedicated accessories for multi-pump constant
pressure water supply system. Parameters C-69~C-73 are valid.
Important: in multi-pump constant pressure water supply system, the inverter does not provide RS485
communication feature.
Code
C-49
Name
Built-in PID
configuration
channel selection
Description
0: Panel potentiometer
1: Panel digital setting
2: External voltage signal 1 (0~10V)
3: External voltage signal 2 (-10V~10V)
4: External current signal
5: External pulse signal
6: RS485 interface setting
Factory setting
0
This parameter is used to choose input channel for PID commands.
0: Panel potentiometer. Set with the potentiometer on the panel.
1: Panel digital setting. Set with the digits on the panel.
2: External voltage signal 1. Set with external analog voltage VI1 (0V~+10V).
3: External voltage signal 2. Set with external analog voltage VI2 (-10V~+10V).
4: External current signal. Set with external analog current signal II (0~20mA).
5: External pulse signal. PID control is set with external pulse signal, and the pulse input terminal is set
with parameter b- 69.
6: RS485 interface. PID control is set via RS485 communication port.
When PID is set via digits on panel or RS485 interface, with conventional PID control mode, value 100.0
corresponds to the max set value (the max feedback value). With PID control mode for constant pressure
water supply system, the setting value is the pressure value, for example, when [A-2] = 0.500, it means that
the set pressure is 0.5MpA.
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EM8 User's Manual
Code
C-50
Name
PID feedback channel
selection
5.The Concrete Explanation of Function Parameters
Description
0: Voltage input 1 (0~10V)
1: Current input
2: Pulse input
3: Voltage input 2 ( -10V~10V )
Factory setting
3
It is valid only when using PID control.
0: External voltage input VI1 as feedback input terminal (0~10V).
1: External current input II as feedback input terminal (0~20mA).
2: External pulse input as feedback input terminal.
3: External voltage input VI2 as feedback input terminal (0~ -10V).
You should set the upper and lower threshold for the input channel according to actual values of the
feedback signal. (Please refer to description of parameters b-34~b-47 for details)
Code
Name
C-51
Feedback signal
character
Description
0: Positive character
1: Negative character
Factory setting
0
This parameter is used to define the relationship of feedback signal and setting signal.
0: Positive. This means that the max feedback signal corresponds to the max setting value.
1: Negative. This means that the min feedback signal corresponds to the max setting value.
Code
C-52
Name
Feedback channel gain
Description
0.01~10.00
Factory setting
1.00
When the signal values mismatch between the feedback channel and the setting channel, you can use this
parameter to adjust signal of the feedback channel.
Code
C-53
Name
PID setup and feedback
display coefficient
Description
0.01~100.0
Factory setting
1.00
With conventional PID control mode, the full display scale of PID's setting value (d-6) and feedback value
(d-7) is 100.0, so, the displayed value may differ from the physical value. In this case, you can modify the
display scale with this parameter.
With PID control mode for constant pressure water supply system, the display of PID setting value (d-6)
and feedback value (d-7) will show pressure setting or feedback value, depending on the setting value
(C-62) of remote pressure meter's scale. When the displayed value differs from the actual value, you can
use this parameter for correction.
Code
C-54
Name
PID controller structure
selection
Description
0: Proportion
1: Integral
2: Proportion & integral
3: Proportion & Integral & differential
Factory setting
1
This parameter is used to choose the structure of the internal PID controller.
0: Proportional control
1: Integral control
2: Proportional-integral control
3: Proportional-integral-differential control
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5.The Concrete Explanation of Function Parameters
EM8 User's Manual
Code
Name
Description
Factory setting
C-55
Proportion gain
0.00~5.00
0.50
C-56
Integration time constant
0.1~100.0s
10.0
C-57
Differential gain
0.0~5.0
0.1
You should adjust the parameters of the internal PID control according to actual requirement and your
system.
Code
Name
C-58
Sampling period
Description
0.01~1.00s
Factory setting
0.10
It is sampling period of feedback value.
Diagram 5-33: PID controller's structure
Code
C-59
Name
Allowable deviation
Description
0~20%
Factory setting
0
This parameter defines the tolerance relative to the max setting value.PID controller stops when the
difference between feedback value and setting value falls below this tolerance.
This function is mainly used in less precise systems that do not need frequent adjustment, such as constant
pressure water supply system. PID controller tolerance is shown as diagram 5-34:
Diagram 5-34: PID controller tolerance
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5.The Concrete Explanation of Function Parameters
Code
Name
C-60
PID feedback wire-break
detection threshold
0.0~20.0%
0.0
PID feedback wire-break
action selection
0: Stop
1: Running as the digital setting
frequency
2: Running as the upper-limit frequency
3: Running as the half of upper-limit
frequency
0
C-61
Description
Factory setting
When PID's feedback detection value is lower than the threshold set with C-60, there must be a feedback
offline. You can choose how the system responds to such problems with parameter C-61.
0: Stop
1: Running as the digital setting frequency
2: Running as the upper-limit frequency
3: Running as the half of upper-limit frequency
Feedback offline detection value is shown as a percentage of the full scale.
When a PID feedback offline is detected, the inverter will run with the above modes, while displays Er.19
and running status parameter alternately.
Code
C-62
Name
Full scale of remote
manometer
Description
0.001~20.00Mpa
Factory setting
1.000
This setting should match the scale of the actually installed pressure meter.
Code
Name
Description
Factory setting
C-63
Alarm lower-limit
pressure
0.001~[C-64]
0.000
C-64
Alarm upper-limit
pressure
[C-63]~[C-62]
1.000
When pressure in the pipeline is lower than the lower limit pressure, and the running frequency of the
inverter reaches upper limit of the set frequency, or all of the pumps are working at power frequency, this
means that the pipeline is under pressure, and the inverter may send alert signal (if parameter A-15 or A-16
is set to 17). You can use this function to help checking if there is a leakage in the pipeline.
When pressure in the pipeline is higher than the upper limit pressure, and the running frequency of the
inverter reaches lower limit of the set frequency, this means that the pipeline is overpressure, and the
inverter may send alert signal (if parameter A-15 or A-16 is set to 16). You can use this function to help
checking if there is a blockage in the pipeline.
Code
Name
Description
Factory setting
C-65
Lower-limit value of
pressure
0.001~[C-66]
0.000
C-66
Upper-limit value of
pressure
[C-65]~[C-62]
1.000
This parameter is used to define the upper/lower limit of pressure setting.
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5.The Concrete Explanation of Function Parameters
Code
Name
C-67
Wake up threshold value
EM8 User's Manual
Description
0.001~[C-68]
Factory setting
0.000
This parameter is used to define the pressure limitation for system to wake up from asleep.
When the pressure of the pipeline is lower than this value, it means that the water supply is under pressure
or the water consumption is increased, and the variable frequency water supply system will wake up
automatically and go working.
Code
C-68
Name
Sleep threshold value
Description
[C-67]~[C-62]
Factory setting
1.000
This parameter is used to define at which pressure the system will go asleep.
When the pressure in the pipeline goes above this setting value, and variable frequency water supply
system is working at the lower limit of the running frequency, this means the water consumption is
decreased greatly or the water supply pressure is OK, the inverter will go asleep at this time automatically
untill be waked up.
When the water supply system reaches wake up or asleep conditions, the inverter will wake up or go asleep
after a waiting time, which is set with parameter C-69.
Code
C-69
Name
Pump switch time
Description
0.1s~1000s
Factory setting
300.0
This parameter is used to set the judgment time for starting the next pump after the inverter's output
frequency reaches upper limit setting and stopping a pump when the inverter's output frequency reaches
lower limit setting. If set to a small value, the system pressure may fluctuate greatly while respond rapidly.
Code
C-70
Name
Electromagnetic switch
delay time
Description
0.1~10.0h
Factory setting
0.5
This parameter is used to define the delay time for solenoid switch when the system changes from power
frequency to variable frequency or vice versa, to make sure that the solenoid switch will respond timely,
thus there is no short circuit between the output terminal and the power supply.
Code
Name
Description
Factory setting
C-71
Multi-pump running
mode
0: Switch as the fixed sequence
1: Timing alternation run
0
C-72
Timing alteration interval
0.5~100.0h
5.0
These two parameters are used to define when the pumps will be switched multi-pumps running (for
system with same capacity pumps).
0: Fixed order switch. Increase/decrease pump(s) in a fixed controlling order according to the detected
pressure. Generally, it will be started from pump with number zero.
1: Switch periodically. With this setting, each pump will be redefined with a new number after the system
has been running for a certain time, thus each pump has the same chance to run and will run for the same
time, avoiding some pumps be clogged by rust buildup from long idle time. Pumps' running time is set with
parameter C-72.
Code
C-73
Name
Timing water-supply
Description
0.5~24.0h
Factory setting
24.0
When the inverter is running in constant pressure water supply system, you can use this parameter to define
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EM8 User's Manual
5.The Concrete Explanation of Function Parameters
when the inverter will run. Timing from the very beginning, the inverter will stop automatically when the
preset water supply time is elapsed, until a new running command is input.
When this parameter is set to 24.0, water supply on fixed time function is invalid.
Code
Name
Description
Factory setting
C-74
AM output hardware
calibration factor
95.0~104.5%
100%
C-75
AO output hardware
calibration factor
95.0~104.5%
100%
C-76
Suppress swing of analog
input
0~30
3
You can suppress swing of analog input setting by increasing parameter C- 76:
Default: C-76=3
Setting rang: 0~30
When there is severe interference, you can suppress the swing by increasing parameter C-76.
This setting is valid for all of the analog input channels.
Code
C-77
Name
Braking unit usage
Description
0~100
Factory setting
25
This parameter is specially designed for models ZC-G-0.75~11KW and ZC-P-1.5~15KW that with braking
units. You can set this parameter according to your actual condition. When there is no need for accurate
braking, you can set a lower usage value, otherwise, set a higher value.
Remark
● This parameter is valid for models under ZC-G-11KW and ZC-P-15KW.
● If it brakes repeat, we suggest you purchasing braking units and braking resistors, and set C-77=0.
Code
Name
C-78
Inverter address
Description
0~30
Factory setting
0
This parameter is used to define the inverter's address when working with RS485 communication. The
inverter will only receive data from host that has a matching address. Parameters C-78~C-82 are used to
define RS485 communication settings. Please refer to appendix 1: RS485 communication protocol.
Code
Name
Description
Factory setting
0: No parity check
0
C-79
Data format
1: Even parity check
2: Odd parity check
This parameter is used to define the data format used in RS485 communication. Each party in the
communication must use the same data format.
0: 1 start bit, 8 data bits, 1 stop bit, no parity checking
1: 1 start bit, 8 data bits, 1 stop bit, even parity
2: 1 start bit, 8 data bits, 1 stop bit, odd parity
Code
C-80
Name
Baud rate
Description
0: 1200 bps
2: 4800 bps
4: 19200 bps
1: 2400 bps
3: 9600 bps
Factory setting
3
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5.The Concrete Explanation of Function Parameters
EM8 User's Manual
This parameter is used to define the baud rate used in RS485 communication. Each party in the
communication must use the same baud rate.
0: 1200 bps
1: 2400 bps
2: 4800 bps
3: 9600 bps
4: 19200 bps
ode
C-81
Name
Master inverter setting
Description
0: The inverter is slave
1: The inverter is master
Factory setting
0
This parameter is used to define the host and slave settings in linked controlling. Without linked controlling,
you should set it as slave.
0: Local inverter as slave
1: Local inverter as host
When the inverter is set as host, it sends running status (commands and frequency settings) via RS485
interface according to a preset protocol continuously. If the inverter is connected with inverters that are set
as slave via RS485 interface, and all of the slave inverters use RS485 interface to set running commands
channel and frequency setting channel, the host inverter controls all slave inverters, including running
commands, frequency settings and push-to-run running, which must follow host's setting strictly.
Code
Name
C-82
Linkage run setting ratio
Description
0.10~10.00
Factory setting
1.00
This parameter is used to define the weight coefficient for the inverter to receive frequency commands via
RS485 interface. The actual running frequency of the inverter equals to this parameter multiplied by
frequency setting command received via RS485 interface.
In linked controlling running, this parameter can be used to set the proportion of running frequency for
multiple inverters.
Code
C-83
Name
RS485 communication
wire-break action mode
Description
0: Stop
1: Keep the existing state
Factory setting
0
0: Stop. If the command setting channel (A-3) of the inverter is set to RS485 interface, when RS485
communication offline (the inverter does not receive command from host for over 1second), the inverter
will shut down automatically. If the frequency input channel (A-1) or PID setting channel of the inverter is
set to RS485 interface, when RS485 communication offline, the inverter will change the parameter to 0
automatically.
1: Keep the existing state. When RS485 communication offline, the inverter will keep the current running
status and setting value, until it got the next command.
Code
Name
C-84
Panel potentiometer gain
factor
Description
0.01~5.00
Factory setting
1.00
This parameter is used to adjust the panel potentiometer's gain for frequency input combination mode.
Please refer to description of parameter b-56 for details.
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EM8 User's Manual
6.Care and Maintenance
6. Care and Maintenance
6.1 Daily inspections and maintenance
High temperature, humidity, dust, vibration and aging parts may affect the steady running of the EM8
series inverter. To avoid this, it is recommend to perform a periodic inspection every 3-6 months.
Warning
● Only skilled professionals allowed to perform the inspection. When necessary, make sure to remove the
input power before performing inspection.
Period
Daily
periodic
Inspection
Item
Ambient
environment
√
√
Cooling
System
Frequency
inverter body
√
√
motor
Input and
output
Parameter
√
Inspection Content
1.Temperature,
humidity
Criterion
1. Temperature>40oC: open the cover
board Humidity<90%: no freezing.
2.Dust,gas
2. No peculiar smell, no inflammable,
explosive gas.
1.Installation
environment
1. Well ventilated installation
environment, no block in the air flue.
2.Fan built in
frequency inverter
2. Running smoothly, no abnormal
noise.
1.Vibration,
temperature
3.Wire,terminal
1. Steady vibration, normal temperature
of air outlet.
2. No unusual noise and odors.
3. Tighten the screws without loose.
1.Vibration,
temperature
1. Running smoothly, normal
temperature.
2.Noise
2. Usual and steady noise.
1.Input voltage
1. Input voltage within the specified
range.
2.Noise
2.Output current
2. Output current in the specified range.
Inspection and Maintenance Items
Recommended meter: input voltage: Moving-coil voltmeter input and output current: Clamp-on ammeter
output voltage: Commutator voltmeter.
Warning
● Before leaving the factory, inverters have been tested by electrical insulation experiment. Inverters do not
need to be high voltage tested.
● If the insulation test is necessary, circuit all the input and output terminals(R, S, T, U, V, W, P, P-, PB).
Single terminal insulation is strictly forbidden. Use 500V mega meter to test.
● Do not use the mega meter to test the control loop.
● Before an insulation for the motor, dismantle the wires contacting motor with inverter.
6.2 Periodic maintenance
Periodic inspection is needed every 3 months or 6 months, base on the usage of user.
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6.Care and Maintenance
EM8 User's Manual
Warning
● Only trained professionals are allowed to perform the maintenance and components replacement of the
inverter.
● Before opening the inverter, switch off all the electrical power supplies to the inverter, and wait LED
light off.
● Measure the voltage between P+ and P- with DC high voltage meter (Less than 25V).
● Avoid screws and other conductive materials fall into the inverter. Otherwise inverter may burn or heavy
damaged.
6.2.1 Inspection content
Tighten the screws of control circuit terminal.
1. Tighten the screws of the main circuit terminal. Check the overheating trace between the copper bars.
2. Check damage to the wires of the main circuit. Especially, If there is a cut trace of the skin contacting to
the outside of the metal.
3. Confirm the insulation of the main circuit wires.
4. Clean the dust of air duct, fan and circuit board. Usually clean this frequently if there is always dust
around surroundings.
6.3 Inspection and replacement of damageable parts
The inverter components may wear out and have performance degradations in long time running. To assure
it working stable and reliable, inverter requires preventive maintenance. When necessary, the parts must be
changed. Damageable parts of inverter include cooling fan and filtering capacitors. Their service life is
related to environment and maintenance.
6.3.1 Filtering capacitors
Pulse current in the main circuit affect the performance of aluminum electrolytic filtering capacitor. Extent
of the effect is related to ambient temperature and service conditions. In common cases, the electrolytic
capacitor has a life span of 40,000 to 50,000 operating hours. Change it according to working hours.
While electrolyte capacitor leaking, relief valve opening or capacitor expansion, change the capacitor
immediately.
6.3.2 Cooling fan
All the cooling fans in the inverter have a usage life about 30,000 to 40,000 hours(continuous use of two
years).Check the fan carefully, when there is a crack in the fan blade or abnormal noise. Replace the fan, if
there are any abnormalities.
6.4 Storage and warranty
6.4.1 Storage
If the inverter is not used temporarily or must be stored for a long time, pay attention to the following
points:
(1) Avoid storing it in an environment with high temperature, humid, vibration or metal dust. Keep good
ventilation.
(2) If the inverter is not used for a long time, it is needed to recovery the features of the filter capacitor that
turn on the inverter every 2 years. Meanwhile, check the functions of the inverter. Turn it on and increase
the voltage stability with an auto-transformer. And power supplying time must be more than 5 hours.
Caution
● If the inverter is not used for a long time, there is a drooping characteristic for the built-in filter capacitor.
6.4.2 Warranty
This inerter enjoy 12 months warranty (from the date of purchase). Our company provides free
maintenance or replacement, if there is a failure or damage in normal use cases within warranty period.
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EM8 User's Manual
6.Care and Maintenance
Remark
● We only provide after sales service for our inverter under normal application.
Within warranty period, regular maintenance cost is needed, when damages of inverter are caused by
Followings, we are not responsible for the applications:
(1) Not according to the manual, beyond the standard specification.
(2) Without allowed, fix or refit the inverter yourself.
(3) Incorrect storage.
(4) Applying the inverter to abnormal function.
(5) Fire, salt corrosion, gas corrosion, earthquake, storm, flood, thunder, abnormal voltage and other force
majeure factors.
Remark
● We provide charging repair service after warranty.
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7.Application Examples
EM8 User's Manual
7. Application Examples
7.1 Panel control: start and stop, panel potentiometer set frequency
7.1.1 Parameter settings
According to the motor rated nameplate data, set the parameter A-5, A-6 for setting. Must set parameters as
following:
[A-1] = 0: parameter A-1 set to 0, choose panel potentiometer for frequency set.
[A-3] = 0: parameter A-3 set to 0, choose panel up, stop control.
7.1.2 Basic wiring diagram
Panel control start, stop, the basic wiring diagram of panel potentiometer set frequency as shown in
diagram 7-1 shows (for reference only).
Diagram 7-1: Panel control: start and stop, panel potentiometer set frequency wiring
7.1.3 Running description
Press "FWD" key for Start frequency inverter, clockwise swirl panel potentiometer knob, set frequency will
gradually increase. Counter clockwise swirl panel potentiometer knob, set frequency will gradually
decrease. Press "STOP", the frequency inverter will stop.
Remark
● The external terminal FW decide the motor running direction. FWD-COM disconnection means the
motor is turning. FWD-COM connect mean the Motor reversal.
7.2 Three wire control mode
7.2.1 Parameter settings
According to the motor rated nameplate data, the parameter A-5, A-6 for parameter setting.
[A-0] = 1: Parameter A-0 set to 1, select the intermediate running parameters.
[A-1] = 0: Parameter A-1 set to 0, choose panel potentiometer to determine the frequency input.
[A-3] = 1: Parameter A-3 set to 1, choose external control.
[A-10] = 2: Parameter A-10 set to 2, choose AO output for voltage output.
[A-11] = 0: Parameter A-11 set to 0, choose FM output for frequency output.
[b-33] = 2: Parameter b-33 set to 2, choose external running instruction mode for three line mode.
[b-63] = 17: Parameter b-63 set to 17, select input terminal 1 for three line type running control.
Other parameters set please according to particular case.
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EM8 User's Manual
7.Application Examples
7.2.2 The basic diagram
Three lines control mode as shown in diagram 7-2 below (for reference only).
Diagram 7-2: Three lines control mode wiring
7.2.3 Operating instructions
FWD, X1, COM closed, the motor forward run (forward command); REV, X1, COM closed, the motor
reverse run(reverse command). FWD, X1, COM together open or one terminal open ,or at this time let
REV closed, frequency inverter stop. REV, X1, COM and at the same time open, or one of the terminal
open, or will the FWD closed, frequency inverter stop.
7.3 External control mode, external voltage setting frequency
7.3.1 Parameter settings
According to the motor rated nameplate data, the parameter A-5, A-6 for parameter setting.
Must set parameters are as following:
[A-1] 2: Parameter A-1 set to 2, choose external voltage 1 (V1) can accept 0~10V signal for frequency
setting.
[A-3] = 1: Parameter A-3 set to 1, choose external control.
7.3.2 The basic wiring
As diagram 7-3, the wiring of external control, external voltage is setting frequency.
Diagram 7-3: The wiring of external control mode and external voltage setting frequency
7.3.3 Operating instructions
FWD - COM closed, the motor forward rung (forward command). REV - COM closed, the motor reverse
80
7.Application Examples
EM8 User's Manual
run (reverse command). FWD - COM, REV - COM and closed or open together, frequency inverter stop.
Set frequency is by external voltage signal terminal 1 (V1).
Remark
● According to the parameter A-1 setting, choose the external input V1 or V2 as signal for frequency
setting.
● Control mode of FWD, REV set by parameter b-33.
7.4 Multi-step speed running, external control mode
7.4.1 Parameter settings
According to the motor rated nameplate data, the parameter A-5, A-6 for parameter setting.
[A-3] = 1: Parameter A-3 set to 1, choose external control mode.
[b-18]~[b-32]: Multi step speed frequency set value (a total of 15 steps).
7.4.2 Basic wiring diagram
Multi-step speed running, external control mode basic wiring diagram as shown in diagram 7-4 .
Diagram 7-4 :multi-step running, external control mode wiring
7.4.3 Operating instructions
FWD - COM closed, the motor forward run (forward command). REV - COM closed, the motor reverse
run (reverse command). FWD - COM, REV - COM together closed or open, frequency inverter stop.
X1, X2 X3, all with COM terminal open, multi step speed running command is invalid, frequency inverter
runs according to preset frequency running (the frequency setting channel set by parameter A–1).
X1, X2 X3, in any one or more terminals close to COM terminal (there are 7 kinds of combination),
frequency inverter runs according to the multi-step speed frequency of X1, X2 X3(multi-step speed
frequency set value by parameter b - 18 - b - 32 ).
Remark
● Choosing the multi-step speed terminal set by parameter B-63~B-69.When chooses the 4 speed control
terminals, can realize 15 steps multi-step speed control.
7.5 Programmable multi-step speed control
7.5.1 Parameter settings
According to the rated nameplate data, the parameter A-5, A-6 is for parameter setting.
Must set parameters as following:
[A-0] = 2: Parameter [A-0] set to 2 to select senior parameters running mode.
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7.Application Examples
[B-18]~[b-24]: Multi-step speed frequency set value (a total of 7 steps).
[C-14] = 1~7: Parameter C-14 chooses arbitrary value. 1~7 is according to need.
[C-15]~[C-35]: According to the running needs, set up simple PLC multi-step speed running time, running
direction, each step’s acceleration and deceleration time.
7.5.2 Basic wiring
Diagram 7-5: The programmable multi-step speed basic wring
7.5.3 Operating instructions
Input start command, frequency inverter runs according to multi-step speed frequency 1 , reached the first
step running time (this time set by parameter C-15 ), and then switch to multi-step speed frequency 2
running, and so on, until the multi-step speed frequency 7 to finish. And then to run according to the
parameter C-14 set running mode (refer to the parameter C-14~C-35 functional specification).
In multi-step speed running process, inverter can stop through stop command, also can through the simple
PLC suspension terminals to suspend programmable multi-step speed running.
7.6 The linkage control of many frequency inverter (Group Control)
7.6.1 To use external voltage to realize many sets of inverter linkage control
7.6.1.1 Parameter Setting
According to the motor rated nameplate data, to set parameter [A-5],[A-6].
Must set parameters are as following:
[A-0] = 2: Parameter A-0 set to 2 to select senior parameters control mode.
[A-1] = 8: Parameter A-1 set to 8, select frequency input channel for combination set mode.
[A-3] = 1: Parameter A-3 set to 1, select the running command channel for external terminal. Panel stop is
invalid
[b-33] = 0: Parameter b-33 set to 0, select two lines control mode 1.
[b-56] = 310: Parameter b-33 set to 0, choose combination as the first channel * the second channel, the
first channel is for external voltage signal 1, the second channel is for the panel adjustment potentiometer.
[C-84] = 1.00: Settings panel potentiometer input gain coefficient is 1.00 (if any deviation, user adjust
parameters according to actual condition).
[b-36] = 1.00: Settings external voltage signal input gain coefficient is 1.00 (if any deviation, user
adjustment parameters according to actual condition).
7.6.1.2 The basic diagram
External voltage realizes many sets inverter linkage running control mode diagram showing as diagram 7-6.
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Diagram 7-6: External voltage realizes many sets inverter linkage running control mode diagram
7.6.1.3 Operating instructions
The diagram shows, there is a need for a constant power supply (10 V), a high power adjustable resistance,
through regulating adjustable resistance voltage, all inverter V1 end input voltage will be changed. When
many sets inverter operates, regulating V1 end input voltage; they at the same rate raise or lower the
frequency. At this time, each table inverter input set function is: input set frequency = external voltage
signal 1 (V1) * panel potentiometer input signal. The type show that external voltage signal (-10V) signal is
same, when change panel potentiometer signal input, the table of the frequency inverter frequency input set
change. So we realized the household output-related system of frequency input set.
7.6.2 Using RS485 constitute a linkage running
7.6.2.1 Parameter settings
According to the motor rated nameplate data, to set parameter A-5, A-6.
Must set parameters as following:
[A-0] = 2: Parameter A-0 set to 2 to choose senior parameters running mode.
[A-1] = 7: Slave inverter frequency setting channel set to RS485 mode.
[A-3] = 3, 4: Slave inverter running command channel set to RS485 mode.
[C-79]: Data format, all frequency inverters data format should set to be same.
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7.Application Examples
[C-80]: Baud rate, all frequency inverters baud rate shall set to be same.
[C-81]: Host Settings, master inverter (host) set to 1, the other a frequency inverter Send to 0 (slave
station).
[C-82]: According to need to set up the master and slave machine running frequency ratio, the parameter is
only effectively for the slave inverter.
7.6.2.2 Basic wiring diagram
Using RS485 constitute a linkage running, basic wiring diagram as shown in diagram 7-7 shows.
7.6.2.3 Operating instructions
Just click on the master inverter (host) to start , stop and JOG control and frequency setting, all other
inverter (slave station) running will strictly keeps consistent with master inverter, set frequency also fully
consistent.
This series frequency inverter maximum is for 31 pieces inverters linkage running.
Remark
● JOG running, each inverter will be operated in accordance with their own set dynamic frequency. If at this
time to maintain many sets of inverter synchronous, just set all of the frequency inverters JOG frequency the
same.
Diagram 7-7: Use RS485 to constitute linkage running basic diagram
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7.7 Inverters constitute a closed-loop control system
7.7.1 Parameter settings
According to the motor rated nameplate data, to set parameter A-5, A-6.
Must set parameters as following:
[A-0] = 2: Parameter A-0 set to 2 to select senior parameters running mode.
[C-48] = 1: Parameter C-48 set to 1, select the built-in PID control.
[C-49] = 0: Setting channel selection, the selection panel potentiometer as PID setting channel.
[C-50] = 3: Feedback channel selection, here select voltage input 2 (V2) is used as the feedback channel,
feedback signal – 10V~ 10V.
[C-54] = 2: Controller structure choice, the choice of PI controller.
[C-55] = 0.5: Proportional gain, according to the need to set.
[C-56] = 10.0: Integral time constant, according to the need to set.
[C-57] = 0.1: Differential gain, here doesn't work.
[C-58] = 0.10: Sampling period, general do not need to change.
7.7.2 Wiring
Frequency inverter constitute a close loop control system show as diagram 7-8:
Diagram 7-8: Frequency inverter constitute a close loop control system
7.8 Use upper computer (PC) control many sets frequency inverters
7.8.1 Parameter settings
According to the motor rated nameplate data, to set parameter A-5, A-6.
Must set parameters as following:
[A-0] = 2: Parameter A-0 set to 2 select senior parameters running mode.
[AS] = 8: Frequency input channel select to combination setting.
[A-3] = 3: The slave inverter running command channel set to RS485 mode (= 3, 4)
[C-79]: Data format, all frequency inverters data format should set to same.
[C-80]: Baud rate, all frequency inverter baud rates shall set to same.
[C-81]: = 0 Inverter set to salve.
[C-83]: Set according to the needs of user
[b-56] = 161: Combination mode selection is the first channel +second channel (users can set according
own need). The first channel input format is RS485 interface. The second channel input format is external
voltage signal 1.
Other parameters, users can set according to own need.
7.8.2 Basic wiring diagram
Upper computer (PC) control many sets frequency inverters, basic wiring diagram as shown in diagram
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7.Application Examples
Diagram 7-9: Upper computer (PC) control many sets frequency inverters wiring diagram
7.8.3 Operating instructions
When the upper computer (PC) constitutes a system with frequency inverter, PC can always control the
working conditions of each frequency inverter, and a timely response. Channel V1 used for manual
adjustment, applied voltage (VO + 10 v), adjusting potentiometer knob, can adjust this frequency inverter
input setting for fine-tuning. This system also can connect with other control system constitutes a closed
loop control system.
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8.Optional Accessories
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8. Optional Accessories
8.1 Remote control cable and adapter
If user only use extend cable connect with panel and inverter, the farthest distance is 15 meters. If user
choose remote control adapter to remote control, the farthest distance can be 1000 meters between inverter
and panel.
Remote control cable specifications: There are 1.5m, 2m, 3m, 5m, 8m, 10m, and 15m.
We have stock for 1.5m, 2m, 3m extend panel cable, and if user needs remote cable longer than 5m, please
specially mention it. The remote control cable is as Fig 8-1 shown:
Diagram 8-1: Remote control cable
8.2 Braking accessories
Please according to inverter’s voltage and power choose proper braking resistor, the normally braking
resistor specification is as following
Model
Matched
Braking
Braking
Braking
G Series
P Series
inverter(KW)
power(KW)
resistor(Ω)
torque(%)
EM8-G3-d75 EM8-P3-1d5
0.75/1.5
0.3
400
100
EM8-G3-1d5 EM8-P3-2d2
1.5/2.2
0.3
400
100
EM8-G3-2d2 EM8-P3-004
2.2/4
0.5
250
100
EM8-G3-004 EM8-P3-5d5
4/5.5
0.8
150
100
EM8-G3-5d5 EM8-P3-7d5
5.5/7.5
1.2
100
100
EM8-G3-7d5 EM8-P3-011
7.5/11
1.6
75
100
EM8-G3-011 EM8-P3-015
11/15
2.0
60
100
EM8-G3-015 EM8-P3-018
15/18.5
3.0
40
100
EM8-G3-018 EM8-P3-022
18.5/22
3.0
30
100
EM8-G3-022 EM8-P3-030
22/30
3.0
30
100
EM8-G3-030 EM8-P3-037
30/37
5.0
20
100
EM8-G3-037 EM8-P3-045
37/45
5.0
20
100
EM8-G3-045 EM8-P3-055
45/55
10.0
8
100
EM8-G3-055 EM8-P3-075
55/75
10.0
8
100
EM8-G3-075 EM8-P3-093
75/93
15
8
100
EM8-G3-093 EM8-P3-110
93/110
15
8
100
EM8-G3-110 EM8-P3-132
110/132
20
6
100
EM8-G3-132 EM8-P3-160
132/160
20
6
100
EM8-G3-160 EM8-P3-185
160/185
25
5
100
EM8-G3-185 EM8-P3-200
185/200
30
4
100
EM8-G3-200 EM8-P3-220
200/220
30
4
100
EM8-G3-220 EM8-P3-250
220/250
30
4
100
EM8-G3-250 EM8-P3-280
250/280
40
3
100
EM8-G3-280 EM8-P3-315
280/315
40
3
100
EM8-G3-315 EM8-P3-350
315/350
40
3
100
EM8-G3-350 EM8-P3-400
350/400
50
2.5
100
EM8-G3-400 EM8-P3-500
400/500
70
2
100
EM8-G3-500 EM8-P3-630
500/630
70
2
100
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Appendix 1:Rs485 Communication Protocol
Appendix 1: RS485 Communication Protocol
1. Summary
EM8 series inverter provide RS485 communication interface. Users can realize centralized monitoring
through PC/PLC (set the control command and monitor the running state of the inverter) to adapt specific
application requirement. The protocol content of this appendix is designed for the above functions.
1.1 Content of communication protocol
This serial communication protocol defines the content of information transmitting in the serial
communication and format for using. It includes host polling format and method of host coding. The
content includes function code, transmit data and error checking for the demand action. The response of
slave uses the same structure. This includes action confirmation, return data, error checking etc. Errors
occur as slave receives messages or the slave cannot act as command of host, it will send fault information
as a feedback to host.
1.2 Scope of application
1.2.1 Applicable devices
EM8 series frequency inverter
1.2.2 Application type
(1) Inverter inserts the multi-application PC/PLC control network having an RS485 terminal.
(2) Inverter insert the point-to-point PC/PLC control monitor having an RS485/RS232 terminal (RS232
need convert interface)
2. Bus structure and specification of communication protocol
2.1 Bus structure
(1)Interface type
RS485 (RS232 is optional, but it needs conversion accessory at same electrical level.)
(2)Transmission mode
For asynchronous serial and half-duplex transmission, at the same time, only one from master and slave
send the data, the other one receive the data. The data is sent out as message by each frame in the
processing of asynchronous serial.
(3)Topology model
Single master station system includes 32 devices at most. One of the devices is master, another is slave. The
address of the slave ranges from 0 to 30. The 31(1FH) is address for broadcast communication. The address
of slave must be unique. The point to point is a special application for single master and multi slave, as
there is only one slave.
2.2 Specification of communication protocol
The communication protocol of EM8 series is a serial master-slave communication protocol. Only one
device (the master) can build protocol, named as interrogation command. The other devices (the slaves)
only provide data in response for interrogation command of the master. This master means PC,IPC, PLC
etc. This slave means inverter. The master can access a slave individually. It also broadcast information to
all the slaves. For the single-visiting command, the slave should return a message (named response). For
the broadcast from the master, the slaves do not need to feedback the feedback message.
Remark
● Parameters related RS485:A-1, A-3, C-49, C-78 to C-83, please pay attention to the setting of these
related parameter.
2.2.1 Data Format
Three optional data transmission forms:
(1)One start bit, eight digital bits, one stop bit, none check
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(2)One start bit, eight digital bit, one stop bit, and odd parity check
(3)One start bit, eight digital bits, one stop bit, even parity check
Default in the slave: one start bit, eight digital bits, stop bit, none check
2.2.2 Baud rate
5 optional baud rate: 1200bps, 2400bps, 4800bps, 9600bps, 19200bps Default baud rate in the slave:
9600bps
2.2.3 Communication mode
(1) With master "polling" from slave "response" of the point to point communication.
(2) Use the inverter’s panel to set the communication parameter of the inverter’s serial interface. It includes
local address, baud rate and data format.
Remark
The master must set the same baud rate and data format to slave inverter.
2.2.4 Communication rules
(1) Three handshake callings are designed in the master. When communication failures or breakdowns
occur, the master can send present message three times at most.
(2) Keep 4 bytes or more between data frames for starting interval. The identified message will be valid,
which has specified starting time interval. The slave sent each byte continuously in 1 frame, no interval.
The time cost for sending a frame is according to baud rate.
(3) The waiting time for the master handshake and the response time of the inverter at most is the transmit
time of 8 bytes. It is judged to failure due to timeout.
(4) The polling from the master to the slave can be built in a table defined by the user. The user can define
the order of polling according to actual demand.
(5) The master must make a regular polling for the slaves in the polling table. The polling period must be
less than 1000ms, including calling three times as no response. It can ensure to find the communication
failures of the slave in time. Also it can realize the function of plug and play.
(6) It is regarded as faults in lines, when the inverter receives no message with in a time (1000ms). Then it
turns in safety running state. (The parameters of safety running are set by C-83)
2.3 Structure of message
Every message has 11 bytes. It includes three parts: frame header, frame data, frame footer.
It is diagram of the data format of frame.
Sending
order
Start Slave Encoding Encoding Parameter Running
bit
address running address
value
word
Setting
Data
value verification
Sending
byte
Single
byte
Double
byte
Definition
Single
byte
Frame header
Single
byte
Single
byte
Double
byte
Parameter data
User's data
Double
byte
Processing data
Single byte
Frame footer
Specification:
(1)Frame header: R: Start bit, stop bit, slave address.
(2)Frame footer: Data verification.
(3)Data of user: Parameter data and processing data. Parameter data includes encoding running command /
response, encoding address, encoding setting/actual value. Processing data includes control command of
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Appendix 1:Rs485 Communication Protocol
the master, response of the slave, setting frequency for the master running, actual frequency
of the slave running.
2.3.1 Master command frame
The sending message from the master is called master command frame. It is the diagram below:
Sending
order
Start Slave
Master Encoding Parameter Running
bit
address command address
value
word
Data
5AH
0~30
Sending
byte
1
1
Definition
1
1
2
Parameter data
Frame header
Setting
Data
word verification
2
2
Processing data
User's data
1
Frame footer
2.3.2 Slave response frame.
The data massage from the slave (inverter) is slave response frame, It is the diagram below:
Actual
Sending Start Slave
Slave
Encoding Parameter/ Status
Data
frequency
order
bit
address response address error code word
verification
value
Data
5AH
0~30
Sending
byte
1
1
Definition
1
Frame header
1
2
Parameter data
2
2
Processing data
User's data
1
Frame footer
2.4 Message data encoding
2.4.1 Frame header
(1) Start bit
This communication protocol provides: The start bit of every message is 5AH. But the start bit itself is not
sufficient for the start of recognizing message. Because the 5AH itself may be other data in the work
message except start bit. So this communication protocol defines a starting interval of transmit time of 4
bytes at least. The starting interval time is part of work message.
The starting interval time for messages of different baud rate
Baud rate(bps)
Starting interval(ms)
Baud rate(bps)
Starting interval(ms)
1200
36.8
2400
18.4
4800
9.2
9600
4.6
19200
2.3
38400
1.15
(2) Slave address
The inverter’s master address, hexadecimal notation, taking a bite, setting range: 0-30.
2.4.2 Data of user
(1) Parameter data
● Master command frame: master command code
Slave response frame: Slave response code command code from the master or the response code from the
slave for the command, their data model is hexadecimal notation, single byte.
Parameter
data
Code
value
Master
command
code
0
No task, do not read or change the parameter data.
1
Read the parameter data: read the parameter data designated by the
slave encoding address.
Description
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Appendix 1:Rs485 Communication Protocol
Parameter
data
Code
value
Master
command
code
2
3
0
Slave
response
code
EM8 User's Manual
Description
Change the parameter data: change the parameter data designated by
the slave encoding address. This data cannot be saved if the slave loses
the power supply.
Change the parameter data and saved it in the EEPROM. Change the
parameter data designated by the slave encoding address and saved it in
the EEPROM.
No task response: The slave response for "no task "command from the
master.
1
Task finished: The slave finished the designated task of the command
code from the master.
2
Task unfinished, response parameter is error code: The slave did not
finish the designated task by command code from the master. Reason
for unfinished task is returned by error code.
1F
Communication fault: verification and fault, the slave do not receive the
specified byte number.
● Encoding address
Data definition: corresponding address value of the slave parameter.
Data type: hexadecimal notation, single byte.
Refer to the user manual for the slave parameter encoding address: Fourth chapter :function code list.
● The master command frame: parameter value
The slave response frame: parameter value or error code data type: hexadecimal notation, double byte,
upper byte is behind.
To the master, parameter value is the data provided to the designed encoding address according to
command code from the master. The value is any value in the range of the parameter value, when the
command code is 0 or 1(no task or reading the parameter data).
To the slave, the parameter value is the returned parameter data with the specified master command code
when the command code operated successfully. When the command operated fail, the returned data is error
code. Detailed error code and means are below:
0: parameter modification is locked (writing is not allowed).
The inverter can allow or forbid the parameter modification by setting the middle rank parameter [b-72]. It
will return this error code when user tries to modify the forbidden parameter.
1: Parameter cannot be modified in the running (writing is not allowed).
Some parameters cannot be modified in the running process of the inverter. It will return this error code
when users try to modify these parameters.
2: Parameter is implied (reading and writing is not allowed).
The middle rank, high rank and inner parameter can be implied. The parameter can be read or written only
if this parameter is open. Or it will return this error code.
3: Retention parameter (reading and writing is not allowed).
There is retention parameter which is not defined now. It will return this error code when users try to
modify these parameters.
4: Number of parameter is exceeded. Writing will be failed.
It will return this error code when the parameter that users try to modify is exceeding the range of inverter
setting.
5: Try to write the processing parameter (condition monitoring parameter).
The condition monitoring parameter [d-0]- [d-33] cannot be rewritten by outside. It will return this error
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Appendix 1:Rs485 Communication Protocol
code when users try to modify these parameters.
6: Illegal function code
It will return this error code when the code address in the message is invalid (it is not the specified
encoding address in the status monitoring list and function parameter list).
Remark
● Parameter value=setting parameter value/minimum unit.
For example, set the blackout restart waiting time as 5.6s. The minimum unit is 0.1, parameter
value=5.6/0.1=56 hexadecimal number is 38H. Look for the minimum unit for each parameter in the
function code list.
(2)Processing data
● Master command frame: running word.
Slave response frame: status word
Data meaning: The running word is data of the master controlling the slave. The status word is data of the
response from the slave running. The detailed meaning is below:
Data type: hexadecimal notation, double byte, upper byte is behind.
Running word: (upper computer → inverter)
Bit
Meaning
Function description
0
Reserve
1
Normal running
1: Make a normal running command to the slave(inverter)
0: Invalid
2
Reversal running
1: Make a reversal running to the slave(inverter)
0: Invalid
3
Error reset
4
Master control
valid
5
6
7
Reserve
Reverse
Reserve
8
Free stop
9
10
11
12
13
Reserve
Reserve
Reserve
Reserve
Reserve
Normal inching
turning
14
15
Reverse JOG
1: Error reset
0: Invalid
1: The running word and setting value in the current data frame update the
old data. Reset this point if you want to finish this control task.
0: The running word and setting value in the current data is invalid. the
inverter should keep the control word and setting value in the last time.
1: Give a free stop command to the slave(inverter)
0: Invalid
1: Give a normal inching turning command to the slave(inverter)
0: Invalid
1: Give a reverse JOG command to the slave(inverter)
0: Invalid
Remark
● Priority of the control order: forward inching turning, reversal inching turning, forward running, reversal
running, free stop.
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Status word:(inverter → upper computer )
Bit
Meaning
1: Normal dc voltage
0
Dc voltage state
0: Abnormal dc voltage
Function description
1
Motor direction
1: Motor reverse
0: Motor forward
2
Output phase
sequence
1: Negative phase sequence
0: Positive phase sequence
3
System fault
4
Operating state
5
6
Waiting to return
after fault
Reserve
1: Inverter fault
0: Inverter normal
1: Inverter is running
0: Inverter is stop
1: Inverter is in the state of waiting to return after fault
2: Inverter is not in the state of waiting to return after fault
1: Inverter is in the DC braking
0: Inverter is not in the DC braking
1: Inverter in the state of free stop
8
Free stop
0: Inverter not in the state of free stop
Inspection speed
1: Inverter is in the state of inspection speed and restart
9
and restart
0: Inverter is not in the state of inspection speed and restart
1: Inverter is in the processing of speed up
10
Speed up
0: Inverter is not in the processing of speed up
1: Inverter is in the processing of speed cut
11
Speed down
0: Inverter is not in the processing of speed cut
Current limiting
1: The limiting current function of inverter is acting
12
action
0: The limiting current function of inverter is not acting
Voltage limiting
1: The voltage limiting function of inverter is acting
13
action
0: The voltage limiting function of inverter is not acting
1: Inverter is in the state of inching running
14
JOG running
0: Inverter is not in the state of inching running
Wait to restart after 1: Inverter is in the state of waiting to restart after prompt shutdown
15
prompt shutdown
0: Inverter is not in the state of waiting to restart after prompt shutdown
● Master command frame: Setting frequency value.
Slave response frame: Actual frequency value data meaning:
Setting frequency value: Set the running frequency of the inverter according to command code from master.
Actual frequency value: Return with the actual running frequency according to command code from master.
Actual value will return corresponding fault code.
Data type: Hexadecimal notation, double byte, upper byte is behind.
Fault code is below:
Fault
Fault
Description
Description
code
code
0
No fault
1
Over current in the speed up
2
Over current in the deceleration
3
Over current in the steady running
4
Overvoltage in the acceleration
5
Overvoltage in the acceleration
6
Overvoltage in the steady running
7
Overvoltage in the stop
8
Under voltage in the inverter running
9
Inverter overload
10
Adapter motor overload
11
Inverter overheat
12
Earth fault
13
Interference fault
14
Output phase lack
15
IPM fault
16
External device fault
17
Current checking circuit fault
18
Communication fault
2.4.3 Frame footer(checksum)
Data meaning: Computed result of data frame checksum
7
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EM8 User's Manual
Appendix 1:Rs485 Communication Protocol
Data type: Hexadecimal notation, single byte.
Method of calculation: Accumulate all the bytes in the range from start bit to data of user. The checksum is
the remainder of accumulated sum divide by 256(FF). Checksum fault will lead to communication fault.
For example: 1 rame
f
data: 5A 30 03 02 88 13 00 00 00 00 2A
Calculation method of checksum: (5A+30+03+02+88+13+00+00+00+00) / FF=12A / FF the remainder is
2A.
3. Example of using
Example 1: Set the No.6 inverter digital frequency to 27.00Hz (parameter A-2).
Master
sending
frame:
Start
bit
Slave
address
Master
command
Encoding
address
Parameter
value
Running
word
5A
06
03
02
8C 0A
0000
Slave
response
frame:
Start
bit
Slave
address
Slave
response
Encoding
address
Parameter/
fault code
State
word
8C 0A
0100
5A
06
01
02
Means: Slave inverter realized the task correctly.
Setting
frequency
value
00 00
Actual
frequency
value
00 00
Example 2: Set the rated frequency of load motor of No 0 inverter to 60.00Hz. (parameter A-6).
Setting
Start
Slave
Master
Encoding Parameter Running
Master
frequency
bit
address command
address
value
word
sending
value
frame:
5A
00
03
06
7017
1200
00 00
Actual
Start
Slave
Slave
Encoding Parameter/
State
Slave
frequency
bit
address response
address
fault code
word
response
value
frame:
5A
00
01
06
7017
0100
00 00
Means: Slave inverter realized the task correctly.
5A
00
02
06
0100
1100
00 00
74
Check
sum
FB
Check
sum
FA
Check
sum
FC
Check
sum
E9
Means: Slave is running, this parameter cannot be modified.
Example 3: Control No.1 inverter forward running with frequency 10.30Hz .
Master
sending
frame:
Start
bit
Slave
address
Master
command
Encoding
address
Parameter
value
Running
word
5A
01
00
00
0000
1200
Slave
response
frame:
Start
bit
Slave
address
Slave
response
Encoding
address
Parameter/
fault code
State
word
0000
1100
5A
01
00
00
Means: Slave inverter realized the task correctly.
5A
01
00
00
0000
0900
01 00
Setting
frequency
value
06 40
Actual
frequency
value
06 04
Check
sum
77
Check
sum
76
65
Means: Slave inverter over current in acceleration.
Example 4: Set input voltage lower limit of No 0 inverter V1 terminal (parameter b-34) to 1.0 V, and let
inverter forward running at setting frequency 30Hz.
94
Appendix 1:Rs485 Communication Protocol
EM8 User's Manual
Setting
frequency
value
5A
00
03
34
0A00
1200
B8 0B
Actual
Start
Slave
Slave
Encoding Parameter/
State
slave
frequency
bit
address response
address
fault code
word
response
value
frame:
5A
00
01
34
0A00
0500
00 00
Means: Slave inverter realized the task correctly. The present slave inverter state is negative phase
sequence with a normal DC voltage. Now the actual frequency is 0Hz.
Start
bit
Master
sending
frame:
5A
Slave
address
00
Master
command
1F
Encoding
address
34
Parameter
value
0000
0500
Running
word
0000
Check
sum
6F
Check
sum
9E
B2
Means: The communication of the slave occurred error, do not execute master command. The present state
of slave is negative phase sequence with normal DC voltage. Now the actual frequency is 0Hz.
Example 5: set the PID feedback quantity broken line detection threshold of No 0 inverter or 9.5%
(parameter C-60). And let inverter free stop.
Setting
Start
Slave
Master
Encoding Parameter Running
Check
Master
frequency
bit
address command
address
value
word
sum
sending
value
frame:
5A
00
03
98
5F00
1001
0000
65
Actual
Start
Slave
Slave
Encoding Parameter/
State
Check
Slave
frequency
bit
address response
address
fault code
word
sum
response
value
frame:
5A
00
01
98
5F00
1100
B8 0B
26
Means: Slave inverter realized the task correctly. The present actual frequency is 30Hz.
95
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