Savch S2800 Series User Manual
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Savch S2800 Series User Manual

Vector control inverter general type
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  • Page 44 5.DESCRIPTION OF FUNCTIONAL PARAMETERS All the functional parameters are described in detail in this chapter. According to attributes, the parameters can be divided into 13 groups; in most of the applica- tions, presetting for operation shall be completed by performing with these parameters of groups.
  • Page 45 Keyboard and terminal UP/DOWN setting Factory setting 00-01 0: Available, the inverter stores parameters on power-lost 1: Available, the inverter dose store parameters on power-lost Setting range 2: UP / DOWN setting is unavailable 3: Parameter setting available on running mode, reset on stopped 4: Reserved Set frequency through "∧"and "∨"...
  • Page 46 Note:When the analog quantity AV12 / ACI selects the of 0~20mA current input , corresponding voltage of 20mA is 5V. The 100.0% set by analog quantity input corresponds to the maximum frequency (00-03), and -100.0% the maximum inverted frequency. 4: Multi-steps speed running setting The inverter will run in multi-Steps Speed mode if the mode is selected.
  • Page 47 Actual acceleration and deceleration time = set acceleration and deceleration time×(set frequency/Max. frequency) S2800 series inverter has two groups of acceleration and deceleration time. Group 1: 00-07, 00-08 Group 2: 09-00, 09-01 Acceleration and deceleration time can be determined by the combination of acceleration and deceleration time selection terminals in multi-function digital input terminal.
  • Page 48 00-09 Operation direction selection Factory setting 0: Default direction operation Setting range 1: Opposite direction running 2: Reverse running prohibited 0: Default direction operation. The inverter runs in the actual direction after power-on. 1: Opposite direction running. Used to change the rotation direction of inverter, which corresponds to change the rotation direction by adjusting any two of motor wires.
  • Page 49 00-11 Function parameters restore Factory setting 0: No operation Setting range 1: Restore defaults 2: Alarm records clearance 0: No operation 1: The inverter restores all default parameters. 2: The inverter clears latest alarm records. Note: after finishing this operation, the value of the function code will return to 0 automatically.
  • Page 50 1 Motor Control Parameters 01-00 Speed control mode Factory setting 0: No PG vector control Setting range 1: V/F control 2: Torque control (No PG vector control) Select inverter operating mode 0: No PG vector control It refers to open cycle vector. Suitable for the high-performance general occasion without coder PG.
  • Page 51 Factory setting 01-02 Motor rated power ***** Setting range 0.1~900.0kw(type setting) Factory setting 01-03 Motor rated frequency 50.00 Setting range 0.01~00-03(Max frequency) 01-04 Factory setting Motor rated rotation speed ***** Setting range 0~36000rpm (type setting) Factory setting 01-05 Motor rated voltage ***** Setting range 0~2000V(type setting) Motor rated current...
  • Page 52 2 Vector Control Parameters Speed cycle proportional gain 1 Factory setting 02-00 Setting range 0~100 0.50 02-01 Speed cycle integral time 1 Factory setting Setting range 0.01~10.00s Switch for lower point frequency Factory setting 5.00 02-02 Setting range 0.00~02-05 Speed cycle proportional gain 2 Factory setting 02-03 Setting range 0~100...
  • Page 53 VC slip compensation coefficient Factory setting 100% 02-06 Setting range 50%~200% The slip compensation coefficient is used to adjust the slip frequency of vector control and improve the system speed control precision. The proper adjustment of this parameter can suppress the static error efficiently. Factory setting G: 150% Torque upper limitation setting 02-07...
  • Page 54 The torque increase is mainly used for the frequency lower than stop frequency (03-02) and the increased V/F curve as the diagram shows below. The torque increasing can improve the V/F low-frequency torque performance . Selecting the proper torque value according to torque quantity. Large load brings quantity increasing, But the value can't be set too large, or the motor will run in over excitation m o d e , w h i c h c a u s e s t h e i n c r e a s i n g o f i n v e r t e r o u t p u t c u r r e n t , a n d m o t o r overheated,efficiency decreasing .
  • Page 55 4 Input Terminal Parameters MI1 terminal function selection Factory setting 04-00 MI2 terminal function selection Factory setting 04-01 Factory setting 04-02 MI3 terminal function selection Factory setting 04-03 MI4 terminal function selection Factory setting 04-04 MI5 terminal function selection Factory setting 04-05 MI6 terminal function selection Setting range 0~25...
  • Page 56 When the command is available, the inverter blocks output immediately. The stopping course of motor is not controlled by inverter. It is recommended to adopt this method when there is no requirements on the big-inertia load and stopping time. The definition of this method is the same as that of coast to stop defined in 07-05.
  • Page 57 Factory setting 04-08 On-off quantity filtering times Setting range 1~10 Set the filtering time of MI1~MI4 terminal samplings. When there is too much interference, it is necessary to increase this parameter to prevent faulty operation. Operation mode of terminal control Factory setting 04-09 0: two-wire control 1...
  • Page 58 2: three-wire control 1. In this mode, The parameters of the following figures set as:04-00=1,04- 01=3,04-02=2,04-09=2,which are:define MI1 as FWD,MI2 as three-wire control and MI3 as REV.In this mode, MI2 is the enabling terminal. operation command is set by FWD, REV controls direction.
  • Page 59 Frequency increase rate of terminal UP/DOWN Factory setting 04-10 0.50 Setting range 0.01~50.00[Hz/s] Used UP/DOWN function to adjust the variation rate when set frequency. Factory setting 04-11 AVI1 lower limitation 0.30 Setting range 0.00~10.00[V] Factory setting 04-12 Corresponding setting of AVI1 lower limitation 0.0% Setting range -100.0~100.0 AVI1 upper limitation...
  • Page 60 AVI2/ACI lower limitation Factory setting 04-16 0.30 Setting range 0.00~10.00[V] Factory setting 04-17 Corresponding setting of AVI2/ACI lower limitation 0.0% Setting range -100.0~100.0 Factory setting 04-18 AVI2/ACI upper limitation 9.50 Setting range 0.00~10.00[V] Corresponding setting of AVI2/ACI upper limitation Factory setting 04-19 100.0% Setting range -100.0~100.0...
  • Page 77 10 PID Control Parameters PID control is a common method for process control, which often does proportion, integral and differential calculation through the feedback signals of controlled quantity and target quantity to adjust the inverter output frequency, form the negative feedback system and makes the controlled quantity stabilized on the target quantity.
  • Page 78 0: Analog channel AVI1 feedback 1: Analog channel AVI2/ACI feedback 2: AVI1+AVI2/ACI feedback 3: Remote communication feedback Selecting PID feedback channel through this parameter. Note: The set channel and feedback channel can't overlapped. Otherwise, PIID can't control efficiently. PID output characteristic selection 10-03 Factory setting 0: PID output is positive...
  • Page 79 Proportion adjustment (P): when there is deviation between feedback quantity and set quantity, the adjusted quantity must be proportional to deviation. If the deviation is invariable, the adjusted quantity is also constant. The proportion adjustment can reflect the variation of feedback rapidly.
  • Page 80 feedback quantity limited deviation set quantity time output frequency time Corresponding relationship between limited deviation and output frequency Feedback broken line detection value Factory setting 10-09 Setting range 0.0~100.0[%] Factory setting 10-10 Feedback broken line detection time Setting range 0.0~60.0[s] Feedback broken line detection value: this test value corresponds to full scale (100%).
  • Page 81 11 Protection Parameters Motor overload protection selection 11-00 Factory setting 0: No protection Setting range 1: General motor (with low-speed compensation) 2: Frequency motor (without low-speed compensation) 0: No protection. It means no motor over load protection(Please handle with care). At this moment, the inverter has no over load protection to the loaded motor.
  • Page 82 When the frequency drop rate of instant power-failure is set as 0, the function of frequency drop of instant power-failure is unavailable. Frequency drop point of instant power-failure: it refers to that after power lost is received by the power grid and the voltage falls to the frequency drop point of instant power-failure, the inverter begins to decrease the operation frequency as the frequency drop rate of instant power-failure (11-03), which makes the motor in electricity generate state and the generate power is able to maintain the bus voltage,so as to ensure the normal operation of inverter...
  • Page 83 Auto-current limitation 11-06 Factory setting Setting range 100~200%[160] Frequency drop rate of over current Factory setting 10.00 11-07 Setting range 0.00~50.00[1.00Hz/s] In the course of inverter operation, the actual rise rate of motor rotating speed is less than that of output frequency due to the overloaded inverter, which may cause the acceleration over current fault and the inverter trip if no measures taken.
  • Page 84 C. Application Mode The S2800 series inverter can be switched in "single host-multiple assistants" control network with RS485 bus. D. Bus Structure...
  • Page 85 F. Communication Frames Structure The digit format of ModBus protocol communication of S2800 series inverter have two forms: RTU (remote terminal unit) mode and ASCII mode (American Standard Code for Information International Interchange). In RUN mode, the format of each byte is as follows: Coding system: 8-binary, every 8-bit frames field includes two hexadecimal characters, hexadecimal system 0~9, A~F.
  • Page 86 RTU data frame format MODBUS message start, the interval of end, the interval of assistant function at least 3.5 at least 3.5 data check address code characters characters The information of one frame must be transmitted in a continuous data flow. If there is the time interval more than 1.5 characters before the end of whole frames transmission, the receiving equipment will clear these incomplete information and treat the following byte mistakenly as the address field part of a new frame.
  • Page 87 The standard structure of ASCII frame is as follows: START ‘:’(0x3A) Address Hi Communication address:8-bit address is combined by 2 ASCII codes Address Lo Function Hi Function code: 8-bit address is combined by 2 ASCII codes Function Lo DATA (N-1) Data content: nx8-bit data content is combined by 2n ASCII codes, n＜=16, 32 ASCII codes at most …...
  • Page 88 RTU assistant response information START T1-T2-T3-T4 ADDR Byte number Date address 0004H upper bit Date address 0004H lower bit Date address 0005H upper bit Date address 0005H lower bit CRC CHK lower bit CRC CHK upper bit T1-T2-T3-T4 ASCII host command information START ‘:’...
  • Page 89 ASCII assistant response information START ‘:’ ‘0’ ADDR ‘1’ ‘0’ ‘3’ ‘0’ Byte number ‘4’ ‘1’ Date address 0004H upper bit ‘3’ ‘8’ Date address 0004H lower bit ‘8’ ‘1’ Date address 0005H upper bit ‘3’ ‘8’ Date address 0005H lower bit ‘8’...
  • Page 90 RTU assistant response information START T1-T2-T3-T4 ADDR Write data address upper bit Write data address lower bit Date content upper bit Date content lower bit CRC CHK lower bit CRC CHK upper bit T1-T2-T3-T4 ASCII host command information START ‘:’ ‘0’...
  • Page 91 ASCII assistant response information START ‘:’ ‘0’ ADDR ‘2’ ‘0’ ‘6’ Write data address upper bit ‘0’ ‘0’ Write data address lower bit ‘0’ ‘5’ Date content upper bit ‘1’ ‘3’ Date content lower bit ‘8’ ‘8’ LRC CHK Hi ‘5’...
  • Page 92 RTU assistant response information START T1-T2-T3-T4 ADDR Sub-function code upper bit Sub-function code lower bit Date content upper bit Date content lower bit CRC CHK lower bit CRC CHK upper bit T1-T2-T3-T4 ASCII host command information START ‘:’ ‘0’ ADDR ‘1’...
  • Page 93 ASCII assistant command information START ‘:’ ‘0’ ADDR ‘1’ ‘0’ ‘8’ ‘0’ Sub-function code upper bit ‘0’ ‘0’ Sub-function code lower bit ‘0’ ‘1’ Date content upper bit ‘2’ ‘A’ Date content lower bit ‘B’ LRC CHK Hi ‘3’ LRC CHK Lo ‘A’...
  • Page 94 J. CRC Checking-CRC(cyclical Redundancy Check) In RTU frame format, the frame includes frame incorrect test field based on CRC computing. The CRC field detects the content of whole frames. The CRC field is 2 b y t e s a n d i n c l u d e s 1 6 - b i n a r y. I t i s a d d e d t o f r a m e a f t e r b e i n g c o m p u t e d b y transmission equipment.
  • Page 95 K. ASCII analog Checking (LRC check) Checking code (LRC check) is the summation from address to data content result. For example, the checking code of above 1.6.2 communication information: 0x02+0x06+0x00+0x08+0x13+0x88=0xAB, then select=0x58 of supplement code of Here provides a simple function of LRC calculation summation for users' reference (using C language programming).
  • Page 96 Function Address Description of data meaning definition characteristic description 0001H:Forward running 0002H:Reverse running 0003H:forward jog Communication 0004H:Reverse jog 1000H control command 0005H:Stop 0006H:Coast to stop (emergency stop) 0007H:Fault reset 0008H:Jog stop 0001H:On forward operation 0002H:On reverse operation Inverter status 1001H 0003H:Inverter is standby 0004H:Fault out Range of communication setting value (-10000~10000)
  • Page 97 Function Address Description of data meaning R/W characteristic description meaning Address description Reserved 3014H of start/stop Reserved 3015H parameters 3016H Reserved Fault information code coincides with number of fault type in function code menu. But the data here 5000H Inverter fault address returned to the host is in hexadecimal system and not fault character.
  • Page 98 Parameters read from inverter are all expressed in hexadecimal system. All values = actual value*10K, of which K is the bit number after decimal point of parameter. M. Response of Wrong Information It uses function code field and fault address to indicate normal response (right) or there are some errors ( called objection response).
  • Page 99 Local communication address Factory setting 12-00 Setting range 0~247, Broadcast address 0. When host is in the course ofediting frame, when the assistant communication address is set as 0, which is used as broadcast communication address. all assistants on ModBus bus will receive this frame, but not to response.
  • Page 100 Communication response delay Factory setting 12-03 Setting range 0~200ms[ms] Communication response delay refers to the interval time from end of inverter data receiving to sending response data to host computer. If the response delay time is shorter than system processing time, the response delay is subject to system processing time. If the response delay time is longer than system processing time, the system has to delay after processing the data.
  • Page 101 Current auxiliary level for Brake valve Factory setting 12-15 20.0% Setting range Percentage of motor rated current The brake current level is the percentage of the motor rated current. For more detail, please refer to parameter 09-16. Output frequency multiple selection Factory setting 12-19 Setting range 0~20...

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