Drive System Application

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1 Drive System Application Energy-saving mode with MICROMASTER 440 and SINAMICS Application description for MICROMASTER 440 and SINAMICS

2 Warranty, liability and support Note The Application Examples are not binding and do not claim to be complete regarding the circuits shown, equipping and any eventuality. The Application Examples do not represent customer-specific solutions. They are only intended to pro-vide support for typical applications. You are responsible in ensuring that the de-scribed products are correctly used. These Application Examples do not relieve you of the responsibility in safely and professionally using, installing, operating and servicing equipment. When using these Application Examples, you recognize that Siemens cannot be made liable for any damage/claims beyond the liability clause described. We reserve the right to make changes to these Application Examples at any time without prior notice. If there are any deviations between the recommendations provided in these Application Examples and other Siemens publications - e.g. Catalogs - then the contents of the other documents have priority. PDF_Energy_saving_mode_MM440 en_v2.0.doc Warranty, liability and support We do not accept any liability for the information contained in this document. Any claims against us - based on whatever legal reason - resulting from the use of the examples, information, programs, engineering and performance data etc., described in this Application Examples shall be excluded. Such an exclusion shall not apply in the case of mandatory liability, e.g. under the German Product Liability Act ( Produkthaftungsgesetz ), in case of intent, gross negligence, or injury of life, body or health, guarantee for the quality of a product, fraudulent concealment of a deficiency or breach of a condition which goes to the root of the contract ( wesentliche Vertragspflichten ). However, claims arising from a breach of a condition which goes to the root of the contract shall be limited to the foreseeable damage which is intrinsic to the contract, unless caused by intent or gross negligence or based on mandatory liability for injury of life, body or health The above provisions does not imply a change in the burden of proof to your detriment. Copyright 2008 Siemens A&D. It is not permissible to transfer or copy these Application Examples or excerpts of them without first having prior authorization from Siemens A&D in writing. If you have any recommendations relating to this document then please send them to us at the following address: mailto:sdsupport.aud@siemens.com Version V2.0 Issue November /13

3 Preposition Preposition Aim of the application This application was generated in order to show users the possibility of the realisation of the energy saving mode on the drive inverters MICROMASTER 440 and SINAMICS. Scope The following core issues are discussed in this application: Description of the method Parameterization of the drive inverter Executing scripts in STARTER PDF_Energy_saving_mode_MM440 en_v2.0.doc Exclusion This application does not include any description of the following STARTER commissioning tool Basic commissioning of the frequency inverter Commissioning higher-level controls It is assumed that readers have basic knowledge about these subjects. Reference to the Automation and Drives Service & Support This article is from the Internet Application Portal of the Automation and Drives Service & Support. You can go directly to the download page of this document using this link. Version V2.0 Issue November /13

4 Table of Contents Table of Contents Table of Contents... 4 Application description Description Function description Circuit and sequence diagram Parameterization of the drive inverter Enabling the PID controller permanently Enabling the PID controller as a function of the frequency Executing scripts in STARTER PDF_Energy_saving_mode_MM440 en_v2.0.doc Appendix and references References Internet link data History Version V2.0 Issue November /13

5 Description Application description This application shows how the energy saving mode can be executed on the drive inverters MICROMASTER 440 and SINAMICS. 1 Description MICROMASTER 430 is a drive inverter which has been specifically designed for pump and fan drive applications. When compared to standard drive units, special functions have been implemented, for example, the energy-saving mode. The following document will show how for applications, where the MICROMASTER 430 is not suitable as a result of the supply voltage and power rating, the energy-saving mode functionality can be implemented using the free blocks of MICROMASTER 440. PDF_Energy_saving_mode_MM440 en_v2.0.doc Version V2.0 Issue November /13

6 Function description 2 Function description A pump, driven by a variable frequency drive fills a water reservoir and establishes a pressure in the system. As long as water is being drawn from the system, the drive inverter is operational. The integrated PID controller ensures that either the water level or the pressure remains constant. Min. frequency [Hz] P1080.D (0.00) PDF_Energy_saving_mode_MM440 en_v2.0.doc PID setpoint PID feedback AFM PID RFG Limit PID P2273 (Δ PID ) PID limit f motor motor control Figure 2-1 Block diagram of a closed-loop pressure controlled drive RFG pressure equalizing reservoir pressure sensor If water is no longer being drawn from the system, the drive inverter is ramped-down to the minimum frequency as a result of the PID controller and remains there until the level / pressure continues to decrease because water is being drawn. The drive frequency then increases again. During the time that the drive is at the minimum frequency, it is possible to power it down and then power it up again as a function of the level / pressure. However, during this time, power must be connected to the drive as otherwise the PID controller would not operate. f(t) load Version V2.0 Issue November /13

7 Circuit and sequence diagram 3 Circuit and sequence diagram The following blocks are necessary to realize this circuit: Word comparator CMP1 and CMP2 Memory flip-flop RS-FF1 Timer1 AND1 logic element PDF_Energy_saving_mode_MM440 en_v2.0.doc Figure 3-1 Interconnecting the free blocks The system deviation of the PID controller is compared with a positive and a negative limit value using the two comparators. The two limit values are entered as a % at connectors P2889 and P2890. If the setpoint/actual value difference is greater than P2889, the output of CMP1 is high and the RS-FF 1 is set. Further, if an on command is present at AND1, the drive inverter is powered-up via control word 1 (P0840). The setpoint for the drive is obtained from the addition of the up ramp (P1120) to the minimum frequency and the setpoint from the PID controller - which is also enabled via a ramp-up function (P2293). The drive then corrects the setpoint / actual Version V2.0 Issue November /13

8 Circuit and sequence diagram value difference. If, as a result of the closed-loop control, the setpoint / actual value difference is less than the value P2889, the set input of the RS-FF1 is withdrawn. The drive goes to the minimum speed which should be set so that water is pumped at precisely this speed. If the actual value continues to increase, the setpoint / actual value deviation becomes negative. When the negative limit (P2890) is exceeded, RS-FF1 is reset. Timer 1 implements an adjustable power-off delay. When this expires, the drive inverter is powered-down again. The drive inverter is only powered-up again if the system deviation increases above the limit value parameterized using P2889. % r2272: CO: PID scaled feedback CO: Filtered PID setp. after RFG PDF_Energy_saving_mode_MM440 en_v2.0.doc 0 % 0 r2273: CO: PID error t t P2889 P2890 DI0/1 Binary input 0/1 r2886 output comparator 1 - set RS-flipflop r2888 comparator 2 - reset RS-flipflop r2841 output RS-FF 1 r2852 output Timer 1 release delay P output AND 1 converter ON / OFF t r0024 CO: Act. filtered output frequency f min PID active Energy saving mode active PID active t Figure 3-2 Sequence diagram, energy-saving mode Version V2.0 Issue November /13

9 Parameterization of the drive inverter 4 Parameterization of the drive inverter Minimum frequency: The minimum frequency P1080 must be set so that the drive is able to establish additional pressure in the pressure reservoir in order to initiate the shutdown via the limit value monitor. Limiting the PID controller: The PID controller is always operational if power is connected to the drive. The limit of the output is set to zero. In order that the drive doesn't suddenly accelerate to the value of the PID controller output when it is powered-up, the PID controller output limit is withdrawn using a ramp-function generator (P2293) as soon as the PID controller is enabled. 4.1 Enabling the PID controller permanently PDF_Energy_saving_mode_MM440 en_v2.0.doc Enabling the PID controller: The PID controller is enabled via the function f act > P2155. P2155 should, for example, be 0.05 Hz below the value of P1080. Table 4-1 Parameterization of the drive inverter Parameter No. Designation Parameter value Note / comments P0003 Access level 3 3: Expert P0701[0] Digital input 0/1 (DI0/DI1) 99 99: Enable BICO parameterization P0840[0] BI: ON/OFF1 r Enable ON/OFF1 = Output of the AND1 P1070[0] CI: Main setpoint 0 no main setpoint P1080[0] Min. frequency Min. frequency = 30 Hz P1120[0] Ramp-up time 2.00 Ramp-up time = 2.00 s P1120[0] Ramp-down time 2.00 Ramp-down time = 2.00 s P2200[0] BI: Enable PID controller 1 1: PID controller permanently activated P2251 PID mode 1 1: PID as trim P2253[0] CI: PID setpoint r CI: PID setpoint = analog input 0/1 P2257 P2258 Ramp-up time for PID setpoint Ramp-down time for PID setpoint Ramp-up time for PID setpoint = s Ramp-down time for PID setpoint = s P2264[0] CI: PID feedback r PID feedback = analog input 1/2 P2293 Ramp-up /-down time of PID 2.00 Ramp-up /-down time of PID limit limit = 2.00 s Version V2.0 Issue November /13

10 Parameterization of the drive inverter PDF_Energy_saving_mode_MM440 en_v2.0.doc Parameter No. Designation Parameter value P2800 Enable FFBs 1 1: Enable Note / comments P2801[0] Activate FFBs 1 Activate AND1 (Level 1) P2801[14] Activate FFBs 1 Activate RS-FF1 (Level 1) P2802[0] Activate FFBs 1 Activate Timer1 (Level 1) P2802[12] Activate FFBs 1 Activate CMP1 (Level 1) P2802[13] Activate FFBs 1 Activate CMP2 (Level 1) P2810[0] BI: AND 1 r st input of the AND1 = DI0/1 P2810[1] BI: AND 1 r nd input of the AND1 = Output of the Timer 1 P2840[0] BI: RS-FF 1 r Set input of the RS-FF1 = Output of the CMP1 P2840[1] BI: RS-FF 1 r Reset input of the RS-FF1 = Output of the CMP2 P2849 BI: Timer 1 r Input signal of the Timer 1 = Q- output of the RS-FF1 P2850 Delay time of timer Delay time of timer 1 = 5.0 s P2851 Mode timer 1 1 1: OFF delay (seconds) P2885[0] CI: CMP 1 r st input of the CMP1 = PID error P2885[1] CI: CMP 1 P nd input of the CMP1 = Fixed setpoint 1 in [%] P2887[0] CI: CMP 2 P st input of the CMP2 = Fixed setpoint 2 in [%] P2887[1] CI: CMP 2 r nd input of the CMP2 = PID error P2889 CO: Fixed setpoint 1 in [%] 5.00 Fixed setpoint 1 = 5.00 % P2890 CO: Fixed setpoint 2 in [%] Fixed setpoint 2 = % Version V2.0 Issue November /13

11 Parameterization of the drive inverter 4.2 Enabling the PID controller as a function of the frequency Enabling the PID controller: If it is to be avoided that the PID controller is already operational before the drive has reached the minimum frequency, then the PID controller enable (P2200) can be switched as a function of the output frequency f act > P2155 (refer to fig. 4-1). In this case, threshold f_1 (P2155) is set to 0.05 Hz below the minimum frequency (P1080). PDF_Energy_saving_mode_MM440 en_v2.0.doc Figure 4-1 Enabling the PID controller as a function of the frequency The following parameters must in addition be set up in the drive inverter: Table 4-2 Enabling the PID controller as a function of the frequency Parameter No. Designation Parameter value Note / comments P2150[0] Hysteresis frequency f_hys 2.00 f_hys = 2.00 Hz P2155[0] Threshold frequency f_ f_1 = Hz P2156[0] Delay time of threshold freq 0 Delay time of f_1 = 0 ms f_1 P2200[0] BI: Enable PID controller r Enable PID controller = f_act > P2155 (f_1) Version V2.0 Issue November /13

12 Executing scripts in STARTER 5 Executing scripts in STARTER For fast parameter changes, you can use the attached script files. Note: Before you execute a script on the drive, please set your drive inverter to the factory settings (P0010 = 30, P0970 = 1) and carry-out a quick commissioning (P0010 = 1) of the drive. The procedure in detail: 1. Save the attached script file in a folder on your computer hard drive. PDF_Energy_saving_mode_MM440 en_v2.0.doc 2. Set-up a script folder for the drive in your STARTER project by clicking with the righthand mouse key on the drive; then click on Expert (lefthand mouse key) and on Insert script folder. A new folder appears SCRIPTS at the lower end of the tree. 3. Import the script from your folder into STARTER as described below: Using the righthand mouse key click on the tab "SCRIPTS"; Click on "ASCII import..." and open the required script file; Assign a name to the opened file and acknowledge with OK. 4. Go Online with the drive. 5. Execute the script by clicking with the righthand mouse key on the script and clicking Accept and execute ; or open the script by double clicking on it and then pressing the button Accept and execute. Also refer to the application Entry ID: "STARTER: Generating application macros" (Chapter 1.5 Save Expert List and User-defined Lists as Script, section Series commissioning of a number of drives using scripts ). Version V2.0 Issue November /13

13 Appendix and references References 6 References 6.1 Internet link data Appendix and references This list is in no way complete and only reflects a selection of suitable references. PDF_Energy_saving_mode_MM440 en_v2.0.doc 6.2 History Table 6-1 Subject area Title \1\ Manuals SINAMICS \2\ Manuals MICROMASTER 4 \3\ Application STARTER: Generating application macros Table 6-2 History Version Datum Change V1.0 June 2003 First edition V2.0 November 2008 Second edition Version V2.0 Issue November /13

Drive System Application

Drive System Application Controlling the main contactor by using free function blocks for MICROMASTER 4, SINAMICS G120 & SINAMICS G120D Application description for MICROMASTER 4, SINAMICS G120 and SINAMICS