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Emheater EM8 Series User Manual

Em8 series frequency inverter
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China EM Technology Limited
Address :
No.80, Baomin 2 road, Xixiang, Bao'an District,Shenzhen ,China
Phone:
86-0755-29985851
Fax:
86-0755-29970305
Zip code:
518101
Website :
Http://www.emheater.com
User's Manual
EM8 Series Frequency Inverter
China EM Technology Limited
EMHEATER

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  • Page 1 EMHEATER User’s Manual EM8 Series Frequency Inverter China EM Technology Limited Address : No.80, Baomin 2 road, Xixiang, Bao'an District,Shenzhen ,China Phone: 86-0755-29985851 Fax: 86-0755-29970305 Zip code: 518101 China EM Technology Limited Website : Http://www.emheater.com...
  • Page 2 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...

  • Page 3: Table Of Contents

    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 ........................
  • Page 4 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 .........................
  • Page 5 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 .........................

  • Page 6: Caution

    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 ●...

  • Page 7: Precaution Of Use

    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. ●...

  • Page 8: About Ip

    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;...

  • Page 9: Installation And Wiring

    EM8 User's Manual 2.Installation and Wiring 2. Installation and Wiring 2.1 EM8 series inverter model explanation Model No. Voltage Power Current Inverter size G series P series (KW) (KG) H/W/D(mm) EM8-G1-d75 0.75 150/85/115 EM8-G1-1d5 EM8-G1-2d2 EM8-G3-d75 EM8-P3-1d5 0.75 173/133/133 EM8-G3-1d5...

  • Page 10: Specification

    2.Installation and Wiring EM8 User's Manual Model No. Voltage Power Current Inverter size EM8-G3-350 EM8-P3-400 EM8-G3-400 EM8-P3-500 1828/981/496 EM8-G3-500 EM8-P3-630 EM8-G3-630 1100 2.2 Specification Items Specification Rated voltage and frequency Single phase 220/Three Phase 380V, 50/60Hz Input Voltage allowable deviation range 200V~240V,320V~460V Voltage 0~380V...
  • Page 11 EM8 User's Manual 2.Installation and Wiring Items Specification Overvoltage prevention Ensure not over-voltage in Dec process. Carrier freq. can be adjusted continuously form Low noise running 1.5KHz to 15.0KHz, which can reduce the motor’s noise furthest. It can realize the smoothness restart and Speed tracking restart instantaneous stop then restart function.

  • Page 12: Installation Size Of Inverter

    2.Installation and Wiring EM8 User's Manual Items Specification Output Frequency, output current, output voltage, motor rotate speed, setting frequency, PID setting, Running status PID feedback, model temperature, accumulative Running running time, analog I/O, terminal Input status. Display panel Last six fault records, output frequency, setting display frequency, output current, output voltage, DC Alarm content...
  • Page 13 EM8 User's Manual 2.Installation and Wiring Inverter model Screw G Series P Series (mm) (mm) (mm) (mm) (mm) (mm) standard EM8-G1/G3 EM8-P3 EM8-G3-5d5 EM8-P3-7d5 EM8-G3-7d5 EM8-P3-011 EM8-G3-011 EM8-P3-015 EM8-G3-015 EM8-P3-018 EM8-G3-018 EM8-P3-022 EM8-G3-022 EM8-P3-030 440.5 EM8-G3-030 EM8-P3-037 EM8-G3-037 EM8-P3-045 EM8-G3-045 EM8-P3-055 EM8-G3-055 EM8-P3-075 297.5 312.5...

  • Page 14: Cable Sectional Area Of Inverter And Breaker

    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.

  • Page 15: Em8 Inverter Circuit Diagram

    EM8 User's Manual 2.Installation and Wiring Model Input side Main circuit(mm Control circuit(mm Breaker(A) Input cable Output cable Control cable 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 1000 G3/P3-350 1000 G3/P3-400 1250 G3/P3-500 1250 G3/P3-630...

  • Page 16: Main Circuit Terminal Explanation

    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 Suitable Inverter EM8-G1-d75~EM8-G1-2d2 Terminal Function explanation mark Single phase 220V AC power U,V,W Output three phase terminals connect with motor Connect with earth terminal...
  • Page 17 EM8 User's Manual 2.Installation and Wiring Diagram 2-10: Main circuit terminal (2) Series Suitable Inverter EM8-G3-d75~EM8-G3-2d2 EM8-P3-1d5~EM8-P3-004 Terminal Function explanation mark DC BUS positive pole The braking resistor connect between P+ and PB R,S,T Input three phase terminals connect with grid U,V,W Output three phase terminals connect with motor Connect with earth terminal...

  • Page 18: Terminal Of Control Circuit

    2.Installation and Wiring EM8 User's Manual Diagram 2-13: Main circuit terminal (5) Series 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 Suitable Inverter EM8-G1-d75~EM8-G1-2d2 Diagram 2-15: Terminal of control circuit diagram (2) Series Suitable Inverter EM8-G3-d75~EM8-G3-2d2...

  • Page 19: Explanation Of Terminals Of Control Circuit

    EM8 User's Manual 2.Installation and Wiring 2.7.1 Explanation of terminals of control circuit Type Terminal Terminal function Notes Selected by control panel JP1 Provide +5V/50mA power or +10V/10mA +10V/V+ power to external (refer to the following diagram) -10V/V- Provide -10V/10mA power V/V1 Analog input voltage signal input terminal 1 0~10V Analog input voltage signal input terminal 2 -10~10V...

  • Page 20: Jp Jumper Explanation

    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...

  • Page 21: 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.

  • Page 22: Working Model Of Panel

    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.

  • Page 23: Running Way Of Panel

    EM8 User's Manual 3.Operation and Running Items 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.

  • Page 24: 2Monitor Parameter Inquiry

    3.Operation and Running EM8 User's Manual 3.6.2Monitor parameter inquiry Running Description Display For example: Current state of running panel looking over the d-0 (Example) monitor parameter inquiry mode. setting frequency Monitor code plus 1 Modify monitor code to the parameter d-4 which needs inquiry. Display the Parameter value according Confirm the inquiry monitor item.
  • Page 25 EM8 User's Manual 3.Operation and Running Mode 2: Running Description Display Change the current Current state of running panel: Running parameter (Decided by digital setting frequency state monitor mode. parameter b-71) Enter digital frequency Digital setting frequency modification mod. Modify the digital setting value to Digital setting frequency the expected value.

  • Page 26: Function Parameter List

    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. "---"...
  • Page 27 EM8 User's Manual 4.Function Parameter List Min. Factory Code Code Name Description Change unit setting addr. 0: Output frequency Analog output (AOI) 1: Output current A-10 setting 2: Output voltage 3: Motor rotate speed 4: PID setting 5: PID feedback 6.

  • Page 28: Intermediate Running Parameters (Group B)

    4.Function Parameter List EM8 User's Manual Min. Factory Code Code Name Description Change unit setting addr. 14: Internal counter reaches peak value 15: Internal counter value reaches A-16 OC2 Output setting t the specified value 16: Upper limit of pressure alarm 17: Lower limit of pressure alarm REV/JOG key 0: REV control;...
  • Page 29 EM8 User's Manual 4.Function Parameter List Min. Factory Code Code Name Description Change unit setting addr. The voltage of DC b-14 0~15% × braking stop b-15 Jog frequency 0.00~Upper limit frequency 0.01 10.00 b-16 Jog Acc. time 0.1~6000s 10.0 b-17 Jog Dec.
  • Page 30 4.Function Parameter List EM8 User's Manual Min. Factory Code Code Name Description Change unit setting addr. V1 Input adjustment b-36 0.01~5.00 0.01 1.00 coefficient V2 Input lower-limit b-37 -10.0V~[b-38] voltage V2 Input upper-limit b-38 [b-37]~10.0V 10.0 voltage V2 Input adjustment 0.01~5.00 0.01 1.00...
  • Page 31 EM8 User's Manual 4.Function Parameter List Min. Factory Code Code Name Description Change unit setting addr. b-57 Carrier frequency 1.5~15KHz Frequency reach b-58 0. 00~20.00Hz 0.01 5.00 checkout amplitude FDT (frequency b-59 0.00~Upper-limit frequency 0.01 10.00 reach detection) FDT output delay b-60 0.0~20.0s time...

  • Page 32: Advanced Running Parameters (Group C)

    4.Function Parameter List EM8 User's Manual Min. Factory Code Code Name Description Change unit setting addr. Monitor item b-71 0~19 selection 0: All parameters are allowed to be revised Parameter revise b-72 1: Prohibit to revise all parameters protection except for parameter [b-72] 2: Prohibit revise all parameters 0: No action Parameter...
  • Page 33 EM8 User's Manual 4.Function Parameter List Min. Factory Code Code Name Description Change unit setting addr. LED Ten digital: simple PLC running time unit: 1: Min 0: Second LED first digital: PLC running style: Programmable 0: No action C-14 multi-speed running 1: Single loop ×...
  • Page 34 4.Function Parameter List EM8 User's Manual Min. Factory Code Code Name Description Change unit setting addr. Step 7 running 0: FWD C-34 direction 1: REV C-35 Step 7 Acc/Dec time 0.1~6000s 10.0 C-36 Jump frequency 1 0.00~Upper-limit frequency 0.01 0.00 Amplitude of jump C-37 0.00 ~5.00Hz...
  • Page 35 EM8 User's Manual 4.Function Parameter List Min. Factory Code Code Name Description Change unit setting addr. 0: Voltage input 1 (0~10V) PID feedback 1: Current input C-50 × channel selection 2: Pulse input 3: Voltage input 2 ( -10V~10V ) Feedback signal 0: Positive character C-51...

  • Page 36: State Monitor Parameter List

    4.Function Parameter List EM8 User's Manual Min. Factory Code Code Name Description Change unit setting addr. Wake up threshold C-67 0.001~[C-68] 0.001 0.000 value C-68 Sleep threshold value [C-67]~[C-62] 0.001 1.000 C-69 Pump switch time 0.1s~1000s 300.0 Electromagnetic C-70 0.1~10.0h ×...
  • Page 37 EM8 User's Manual 4.Function Parameter List Monitor code Content Unit Address of code Present setting frequency of inverter 0.01Hz DC bus voltage PID setting value 0.1%Mpa* PID feedback value 0.1%Mpa* Running linear speed 0.01* Setting linear speed 0.01* d-10 Input AC voltage d-11 Temperature of IGBT d-12...

  • Page 38: Protection And Solution

    4.Function Parameter List EM8 User's Manual 4.5 Protection and solution Code Probable Cause Fault description Solution 1. Acceleration time is too short. 1. Extend the acceleration time. Over-current Er. 01 2. Torque boost is too high or 2. Descend the torque boost or during Acc V/F curve is not suitable.
  • Page 39 EM8 User's Manual 4.Function Parameter List Code Probable Cause Fault description Solution 1. Reduce the load or replace 1. Load is too heavy. with higher capacity inverter. 2. Acc time is too short. 2. Prolong Acc time. Er. 09 Inverter overload 3.

  • Page 40: Fault Record Inquiry

    4.Function Parameter List EM8 User's Manual Code Probable Cause Fault description Solution 1. PID feedback signal wire is disconnection. 1. Check the feedback channel. 2. The transistor which is used 2. Check whether there is fault on PID feedback to detect the feedback signal, transistor.

  • Page 41: The Concrete Explanation Of Function Parameters

    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 Name Description Factory setting 0: Basic running parameter Running parameter 1: Intermediate running parameter Selection 2: Senior running parameter [A-0] is used to set running model to simplify the running, user can choose according to application.
  • Page 42 5.The Concrete Explanation of Function Parameters EM8 User's Manual frequency channel is as the follow columns: Frequency setting Frequency setting Frequency setting Frequency input channel choose terminal-3 choose terminal-2 choose terminal-1 Panel potentiometer Panel digital setup External voltage signal VI1 External voltage signal VI2 External current signal II UP/DW terminal...
  • Page 43 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 Name...
  • Page 44 5.The Concrete Explanation of Function Parameters EM8 User's Manual Code Name Description Factory setting 0: Output frequency 1: Output current Analog output (AOI) 2: Output voltage A-10 setting 3: Motor rotate speed 4: PID setting 5: PID feedback 6. Panel potentiometer 7.
  • Page 45 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...
  • Page 46 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 Name Description Factory setting...
  • Page 47 EM8 User's Manual 5.The Concrete Explanation of Function Parameters Code Name 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 A-15 OC1 Output setting reached 6: Output frequency lower limit is reached...
  • Page 48 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).

  • Page 49: Intermediate Running Parameters (Group B)

    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).
  • Page 50 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.
  • Page 51 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 Name Description Factory setting 0: Manual Torque boost mode 1: Auto 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.
  • Page 52 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.
  • Page 53 EM8 User's Manual 5.The Concrete Explanation of Function Parameters Code Name Description Factory setting 0: Deceleration stop mode: b-11 Stop mode 1: Free stop mode 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.
  • Page 54 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...
  • Page 55 EM8 User's Manual 5.The Concrete Explanation of Function Parameters Terminal 1 Terminal 2 Terminal 3 Terminal 4 Multi-step terminal 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 Multi speed ACC/DEC Time...
  • Page 56 5.The Concrete Explanation of Function Parameters EM8 User's Manual Multi speed 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.
  • Page 57 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 Stop Trigger switch function explanation: 1.
  • Page 58 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] <...
  • Page 59 EM8 User's Manual 5.The Concrete Explanation of Function Parameters Code Name Description Factory setting Pulse input adjustment b-48 0.01~5.00 1.00 coefficient 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.
  • Page 60 5.The Concrete Explanation of Function Parameters EM8 User's Manual Parameters list of monitoring state Code Content Unit Code address Inverter present output frequency Inverter present output current Inverter present output voltage Present motor speed Inverter present set frequency DC BUS voltage PID set value %/MPA E1H PID feedback value...
  • Page 61 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 Description Factory setting Frequency input channel Refer to the detailed description of b-56 combination function...
  • Page 62 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%).
  • Page 63 EM8 User's Manual 5.The Concrete Explanation of Function Parameters Code Name Description Factory setting FDT (frequency reach b-59 0.00~Upper-limit freq 10.00 detection) b-60 FDT output delay time 0.0~20.0s 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).
  • Page 64 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 No function Multi-step speed 1 Multi-step speed 2 Multi-step speed 3 Multi-step speed 4 Forward JOG Reverse JOG Free stop...

  • Page 65: Advanced Running Parameter (Group C)

    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 Name Description Factory setting...
  • Page 66 5.The Concrete Explanation of Function Parameters EM8 User's Manual Diagram 5-23: Slip frequency compensation Code Name Description Factory setting Over-load & over-heat 0: Lock the output protection mode 1: Limit-current running(Alarm) This parameter is used to control how the inverter is protected from overload/overheat. 0: Stop output immediately.
  • Page 67 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: Rated current of the motor [C-2]= ×100 Rated output current of the inverter Remark ●...
  • Page 68 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 Name Description Factory setting 0: Invalid Auto stable voltage 1: Valid 2: Invalid only at deceleration 0: Invalid 1: Valid The function Automatic Voltage Regulator is designed to make sure that the output voltage of the inverter is...
  • Page 69 EM8 User's Manual 5.The Concrete Explanation of Function Parameters Diagram 5- 26: Dead area time of changing rotation direction Code Name Description Factory setting C-11 Internal timer set value 0.1~6000.0s 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.
  • Page 70 5.The Concrete Explanation of Function Parameters EM8 User's Manual Code Name Description Factory setting LED Ten digital: simple PLC running time unit: 1: Min 0:second LED first digital: PLC running style: 0: N o a ction Programmable C-14 1: Single loop multi-speed running setup 2: Continuous loop 3: Keep the final value...
  • Page 71 EM8 User's Manual 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.
  • Page 72 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...
  • Page 73 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...
  • Page 74 5.The Concrete Explanation of Function Parameters EM8 User's Manual Code Name Description Factory setting 0: No PID control 1: Normal PID control 2: Constant-pressure water-supply PID 3: Double-pump constant pressure C-48 Built-in PID control water-supply PID (Need accessory) 4: Triple-pump constant pressure water-supply PID (Need accessory) 5: Four-pump constant pressure water-supply (Need accessories)
  • Page 75 EM8 User's Manual 5.The Concrete Explanation of Function Parameters Code Name Description Factory setting 0: Voltage input 1 (0~10V) PID feedback channel 1: Current input C-50 selection 2: Pulse input 3: Voltage input 2 ( -10V~10V ) It is valid only when using PID control. 0: External voltage input VI1 as feedback input terminal (0~10V).
  • Page 76 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 You should adjust the parameters of the internal PID control according to actual requirement and your system.
  • Page 77 EM8 User's Manual 5.The Concrete Explanation of Function Parameters Code Name Description Factory setting PID feedback wire-break C-60 0.0~20.0% detection threshold 0: Stop 1: Running as the digital setting PID feedback wire-break frequency C-61 action selection 2: Running as the upper-limit frequency 3: Running as the half of upper-limit frequency When PID's feedback detection value is lower than the threshold set with C-60, there must be a feedback...
  • Page 78 5.The Concrete Explanation of Function Parameters EM8 User's Manual Code Name Description Factory setting C-67 Wake up threshold value 0.001~[C-68] 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.
  • Page 79 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...
  • Page 80 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 Name...

  • Page 81: Care And Maintenance

    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 ●...

  • Page 82: Inspection Content

    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.
  • Page 83 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.

  • Page 84: Application Examples

    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.

  • Page 85: The Basic Diagram

    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).

  • Page 86: Multi-Step Speed Running, External Control Mode

    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.

  • Page 87: Basic Wiring

    EM8 User's Manual 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.

  • Page 88: Operating Instructions

    7.Application Examples EM8 User's Manual 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.

  • Page 89: Basic Wiring Diagram

    EM8 User's Manual 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.

  • Page 90: Inverters Constitute A Closed-Loop Control System

    7.Application Examples EM8 User's Manual 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.

  • Page 91: Operating Instructions

    EM8 User's Manual 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.

  • Page 92: Optional Accessories

    8.Optional Accessories EM8 User's Manual 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.

  • Page 93: Appendix 1: Rs485 Communication Protocol

    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.

  • Page 94: Baud Rate

    Appendix 1:Rs485 Communication Protocol EM8 User's Manual (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...

  • Page 95: Master Command Frame

    EM8 User's Manual 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 Start Slave...
  • Page 96 Appendix 1:Rs485 Communication Protocol EM8 User's Manual Parameter Code Description value data Change the parameter data: change the parameter data designated by the slave encoding address. This data cannot be saved if the slave loses Master the power supply. command Change the parameter data and saved it in the EEPROM.
  • Page 97 EM8 User's Manual 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 ●...

  • Page 98: Frame Footer(Checksum)

    Appendix 1:Rs485 Communication Protocol EM8 User's Manual Status word:(inverter → upper computer ) Meaning Function description 1: Normal dc voltage Dc voltage state 0: Abnormal dc voltage 1: Motor reverse Motor direction 0: Motor forward Output phase 1: Negative phase sequence sequence 0: Positive phase sequence 1: Inverter fault...

  • Page 99: Example Of Using

    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 e xample: 1 f rame da ta: 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 3.
  • Page 100 Appendix 1:Rs485 Communication Protocol EM8 User's Manual Setting Start Slave Master Encoding Parameter Running Check Master frequency address command address value word sending value frame: 0A00 1200 B8 0B Actual Start Slave Slave Encoding Parameter/ State Check slave frequency address response address fault code...

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