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LG Electronics K7F-PIDA manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    U s e r ’ ’ ’ ’ s s s s Manual LG Programmable Logic Controlle r K7F – PIDA K4F – PIDA MASTER-K LG LG LG LG Industrial Systems[...]

  • Page 2

        CONTENTS     Chapter 1. INTRODUCTION 1.1 Features    ?[...]

  • Page 3

    Chapter 4. BUFFER MEMORY CON FIGURATION AND FUNCTIONS 4.1 Buffer Memory Configuration     4-1 4.1.[...]

  • Page 4

    Chapter 6. PROGRAMMING 6.1 Basic Programming     6-1 6.1.1 K7F[...]

  • Page 5

    Be sure to read carefully the safety precautions given in data sheet and user’s manual before operating the module and follow them. The precautions explained here only apply to the K7F-PIDA and K4F-PIDA. For safety precautions on the PLC system, see the MASTER-K200S/300S/1000S User’s Manuals. A precaution is given with a hazard alert triangular[...]

  • Page 6

    CAUTION ! Installation Precautions  Operate the PLC in the environment conditions given in the general specifications.  If operated in other environment not specified in the general specifications, it can cause an electric shock, a fire, malfunction or damage or degradation of the module  Make sure the module fixing projections is inserted[...]

  • Page 7

    Chapter 1. INTRODUCTION 1 - 1 Chapter 1. INTRODUCTION These two modules are called K7F-PIDA and K4F-PIDA. The K7F-P IDA is used with the CPU of K1000S series, and the K4F-PIDA is used with the CPU of K300S series. Hereafter, the two modules wil l be commonly called the PID control module. PID control means a control action that in order to keep the[...]

  • Page 8

    Chapter 2. SPECIF ICATIONS 2 - 1 Chapter 2 . SPECIFICATIONS Table 2.1 shows the general specifications of MASTER-K series. No Items Specifica tions Standard 1 Operating ambient tem p erature 0 ~ 55  2 Storage ambient temperature -25 ~ 70  3 Operating ambient humid it y 5 ~ 95%RH, non-co ndensing 4 Storage ambient humid ity 5 ~ 95%RH, non -con[...]

  • Page 9

    Chapter 2. SPECIF ICATIONS 2 - 2 2.2 Performance Specifications T able. 2.2 shows performance specifications of the PID control module. Specifications Items K7F-PIDA K4F-PIDA Proportional constant (P) 0.01 ~ 100.00 ( When integral and derivative constants are set to 0.0 sec, proportional action is applied.) Integral constant (I) 0.0 ~ 3000.0 sec ( [...]

  • Page 10

    Chapter 2. SPECIF ICATIONS 2 - 3 2.3 Names of Parts and Function s The following gives names of parts : No. Descriptions Loop Run LED ① It shows the PID control module run status. ! ON : The corresponding loop is running. ! OFF : The corresponding loop is running. ! Flickering : Error status. Error V alue is d isplayed. RUN LED ② It shows the P[...]

  • Page 11

    Chapter 2. SPECIF ICATIONS 2 - 4 2.4 PID C o ntrol Action 2.4.1 Processing type 1) Velocity type V elocity type is a processing that in PID processing, the present Manipulated V alue(MV) is obtained by adding the calculated variation of MV ( ∆ MV) to the previous MV 2) Measured Value Derivative Type (Pre-der ivative) Measured value derivative pro[...]

  • Page 12

    Chapter 2. SPECIF ICATIONS 2 - 5 2.4.2 Control Action 1) Proportional Action (P Action) (1) P action means a control action that obtains a MV which is proportional to the deviation (E: the difference between SV and PV). (2) The expression which denotes the change relationship of E to MV in P action is shown as follow s: where Kp is a proportional c[...]

  • Page 13

    Chapter 2. SPECIF ICATIONS 2 - 6 [Fig. 2.2] When the propor tional constant Kp is lar ge. [Fig. 2.3] When the propor tional constant Kp is small.[...]

  • Page 14

    Chapter 2. SPECIF ICATIONS 2 - 7 2) Integral Action (I Aaction) (1) When a deviation(E) occurs between SV and PV , Integral action continuously adds the deviation to or subtracts it from the MV in accordance time in order to eliminate the deviation When a deviation is small it is not expected that the MV w ill be changed by P action but I action wi[...]

  • Page 15

    Chapter 2. SPECIF ICATIONS 2 - 8 [Fig. 2.5] When a long integration ti me is given. [Fig. 2.5] When a short integration time is give n. Set V alue[...]

  • Page 16

    Chapter 2. SPECIF ICATIONS 2 - 9 3) Derivative Action (D Action) (1) When a deviation occurs due to alteration of SV or external disturbances, D action restrain s the changes of the deviation by producing MV which is proportioned with the change velocity (a velocity whose deviation changes at every constant interval) in order to eliminate the devia[...]

  • Page 17

    Chapter 2. SPECIF ICATIONS 2 - 10 4) PID Actio n (1) P ID action controls the control object with the manipulation quantity produced by ( P+I+D) action. (2) P ID action when a given deviation has occurred is shown as the fo llowing Fig. 2.8. [Fig. 2.8] PID action at a constant deviation 5) PID Processing Expression PID expressions are of measured v[...]

  • Page 18

    Chapter 2. SPECIF ICATIONS 2 - 11 6) Forward/Reverse Actions (1) PID control has two kinds of action, forward action and reverse action. a) Forward action makes PV reach SV by outputting MV when PV is less than SV . b) Reverse action makes PV reach SV by outputting MV when PV is more than S V . (2) A diagram in which forward and reverse actions are[...]

  • Page 19

    Chapter 3. INSTALLATION 3- 1 Chapter 3. INSTALLATI ON 3.1 I nstallation Amb ience This module has high reliability regardless of its installation ambience. But be sure to check the following for system in higher reliability and stability. 1) Ambience Requirements Avoid installing this module in locations, wh ich are subjected or exposed to: - Water[...]

  • Page 20

    Chapter 4. BUFF ER MEMORY CONF IGURATION AND FUNCT ION S 4- 1 Chapter 4. BUFFER MEMORY CONF IGURATION AND FUNCTIONS The PID control module has the PLC CPU and the buffer memories for communications. 4.1 Bu ffer memo ry Configuration The followings describe buffer memory configuration. 4.1.1 K7F-PIDA Buf f er Memory Address (Decima l) Function Descr[...]

  • Page 21

    Chapter 4. BUFF ER MEMORY CONF IGURATION AND FUNCT ION S 4- 2 4.1.2 K4F-PIDA Buf f er Memory Address (Decima l) Function Descriptions Default Setting Read / Write 0 Loop enable/dis able Specificati on area Bit On(1): Enabl ed Bit Off(0): Disabled Disabl ed R/W 1 Auto/Manual oper ation Specificati on area Bit On(1): Auto Bit Off(0): Manual Auto R/W [...]

  • Page 22

    Chapter 4. BUFF ER MEMORY CONF IGURATION AND FUNCT ION S 4- 3 4.2 Functions of Buffer Me m ory Each address in the buffer memory occupies one word and it is represented with 16 bits. In the 16 bits which compose an address, e very bit can be set to either “1” when it should be turned On or “0” when Off in order to implement the function of [...]

  • Page 23

    Chapter 4. BUFF ER MEMORY CONF IGURATION AND FUNCT ION S 4- 4 4.2.3 Specifying Forward/Reverse Action (K7F-PIDA : Addresses 4, 5, K4F-PIDA : Address 2) 1) T urns the corresponding bit Off(0) for forward action processing and On (1) for reverse action processing. 2) Default is forward action. 3) The following show the bit corresponding to each loop.[...]

  • Page 24

    Chapter 4. BUFF ER MEMORY CONF IGURATION AND FUNCT ION S 4- 5 8.2.5 Loop Run Information (K7F-PIDA : Addresses 8, 9, K4F-PIDA : Address 4) 1) This area stores information on run status of each loop. 8.2.6 etting PID Contr ol Data 1) The addresses for PID control data and their sett ing range are given as follows. Address (10 decimal) K7F-PIDA K4F-P[...]

  • Page 25

    Chapter 4. BUFF ER MEMORY CONF IGURATION AND FUNCT ION S 4- 6 4.2.7 Outputting Manipulated Value (K7F-PIDA : Addresses 202 to 233, K4F-PIDA : Addresses 53 to 60) 1) This area stores the MV of each loop. 2) The MV output range is 0 to 16000. 4.2.8 Setting Error Information (K7F-PIDA : Addresses 234 to 265, K4F-PIDA : Addresses 61 to 68) 1) When sett[...]

  • Page 26

    Chapter 5. DEDIC ATED INST R UCTION S FOR SP ECIAL MODUL E S 5 - 1 Chapter 5. DEDICATED INSTRUCTIONS  FOR SPECIAL MODULES (Read from /Write to Buf fer memory) The PID module is available only for local and oc cupies 16 I/O points. 5.1 Read from Buffer Memory ⋅ ⋅⋅ ⋅ ⋅ ⋅⋅ ⋅ ⋅ ⋅⋅ ⋅ GET , G ET P <Format> execution condi[...]

  • Page 27

    Chapter 5. DEDIC ATED INST R UCTION S FOR SP ECIAL MODUL E S 5 - 2 5.2 W rite to Bu ffer Memory ⋅ ⋅⋅ ⋅ ⋅ ⋅⋅ ⋅ ⋅ ⋅⋅ ⋅ PUT , PUT P <Format> execution condition f o r P U T Format Descriptions Available D ata Type n1 The slot No. where a special module i s mounted. Integer n2 Head address of the special module buffer memo[...]

  • Page 28

    Chapter 6. PROGRAMMING 10 - 1 Chapter 6. PROGRAMM ING 6.1 Basi c Programmin g ▲ The following describes the method to set the running conditions in the buffer memories of the PID control module. ▲ The PID control module is already mounted on the slot 0. ▲ The PID control module occupies 16 I/O points. 6.1.1 K7F-PIDA SET d ata are pr ocess ed [...]

  • Page 29

    Chapter 6. PROGRAMMING 10 - 2 6.1.2 K4F-PIDA SET d ata are pr ocess ed with tri ggeri ng P2 1 whenev er the conte nts in the buf fer memori es (addre sses: 1,1 ,4,5,10 ~ 41 and 74 ~ 20 2) are c ha nged. proces sin g[...]

  • Page 30

    Chapter 6. PROGRAMMING 10 - 3 6.2 Appl icatio n Progra mmi ng 6.2.1 A Program for Contr olling an Electric Fur nace (with Applying the A/D Conversion Module, P ID Control Module and D /A Conversion Module ) 1) System Configuration 1) Initial Settings (1) PID control module A) Specifying used loop : loop 0 B) Specifying forward/reverse action : forw[...]

  • Page 31

    Chapter 6. PROGRAMMING 10 - 4 (2) In the PID control module, 100 ° C (where the signal converter output is 12 mA, 12800 as a digita l value.) is set as SV . With regards to P .I.D constants, the manipulated va lue in the BCD digital switch i s set as the proportional constant when P0020 turns on, as the integral constant when POO21 turns on, and a[...]

  • Page 32

    Chapter 6. PROGRAMMING 10 - 5 5) Program D/A conver sion Module initia lization switch Makin g the PV of PID contr ol mod ule be set to the A/ D convers ion value[...]

  • Page 33

    Chapter 6. PROGRAMMING 10 - 6 10.2.2 A Program for Control U sing a RTD (with Applying the RTD Input Module, PID Control Module a nd D/A Conver sion Module) 1) System Configuration 2) Initial Settings (1) PID control module A) Specifying used loop : loop 0 B) Specifying forward/reverse action: forward action C) Specifying the Set V alue: 8000 D) Sp[...]

  • Page 34

    Chapter 6. PROGRAMMING 10 - 7 4) Progr am RTD RTD in put modu le RTD RTD RTD Readi ng t he BCD digital Switc h v alue and t h en using i t as P or I or D val ue Makin g the PV of PID Contr ol mod ule be set to the det ec ted temp er atur e value[...]

  • Page 35

    Chapter 6. PROGRAMMING 10 - 8 6.2.3 A Program for Contr o l Using a Thermocouple (with Applying the TC Inpu t Module, PID Contr ol Module and D/A Conversion Module) 1) System Configuration 2) Initial Settings (1) TC input module A) Specifying used channel : channel 0 B) Specifying TC type: K type (2) PID control module A) Specifying used loop : loo[...]

  • Page 36

    Chapter 6. PROGRAMMING 10 - 9 4) Program TC inpu t modu le initializatio n Speci fy i ng TC in put m odul e SE T dat a en abl e Speci fyi ng T C of ch an nel to K type Readi ng t he digital co nvers ion valu e of the TC input m odule t o D0 and er ror i nform ation to D 1. If an er r or occ urs at the c hannel 0 of t he TC inp ut module, M 10 turns[...]

  • Page 37

    Chapter 7. TROUBLES HOOTING 7- 1 Chapter 7. TROUBLESHOOTING The followings explain errors that could occur during operating the PID control module and their troubleshooting. 7.1 Errors Indicated by RUN LED Flickeri ng Errors indicated by PID control module RUN L ED flickering are given below . RUN LE D Status Error T ype Loop RUN LED status Flicker[...]

  • Page 38

    Chapter 7. TROUBLES HOOTING 7- 2 4.2.3 Unreadable Processing Result of P ID control module 4.2.4 Run LED of enabled Loo ps Off 4.2.5 PID Contr ol Module Hardware Defect  See Section 7.2.2. Is RUN LED turned OFF? See Section 7.2.1. Is RUN LED flicker in g ? A re the numbers of the loops used in the processing correctl y s p ecified[...]

  • Page 39

    Chapter 8. DIMENSIO NS 8 - 1 Chapter 8. D IMENSIONS 8.1 K7F-PID A Dimensi ons . K7F-PIDA[...]

  • Page 40

    Chapter 8. DIMENSIO NS 8 - 2 8.2 K4F-PIDA Dimensions K4F-PIDA[...]