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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.
CONTENTS Chapter 1. INTR ODUCTION 1.1 Features .
Chapter 4. BU FFER MEMORY CON FIGURATION AND FUNCTIONS 4.1 Buffer Memory Configuration 4-1 4.
Chapter 6. PROG RAMMI NG 6.1 Basic Programming 6-1 6.
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.
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 specificatio.
Chapter 1. INTRODUCTION 1 - 1 Chapter 1. INTRODUCTION These two modules are called K7F-P IDA and K4F-PIDA. The K7F-PIDA 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.
Chapter 2. SPECIF ICATIONS 2 - 1 Chapter 2 . SPECIFICATIONS Table 2.1 shows the general specifications of MASTER-K series. No Items Specificatio ns Standard 1 Operating ambient tem p erature 0 ~ 55 .
Chapter 2. SPECIF ICATIONS 2 - 2 2.2 Performance Specificati ons 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.
Chapter 2. SPECIF ICATIONS 2 - 3 2.3 Names of Parts and Functions 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.
Chapter 2. SPECIF ICATIONS 2 - 4 2.4 PID Control Action 2.4.1 Processing type 1) Velocity type V elocit y type is a processing that in PID processing, the present Manipulated V alue(MV) is obtained by.
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).
Chapter 2. SPECIF ICATIONS 2 - 6 [Fig. 2.2] When the propor tional constant Kp is large. [Fig. 2.3] When the propor tional constant Kp is small..
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 deviat ion to or subtracts it from the MV in ac.
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 alu e.
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 restrains the changes of the deviation by produc.
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 ha s occurred is shown as the fo llowing Fig. 2.8. [Fig. 2.
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 SV .
Chapter 3. INSTALLATION 3- 1 Chapter 3. INSTALLATI ON 3.1 I nstallation Ambience This module has high reliability regardless of its installation ambience.
Chapter 4. BUFF ER MEMO RY CONFIGU RATION AND FUNCTION S 4- 1 Chapter 4. BUFFER MEMORY CONFIGURATION AND FUNCTIONS The PID control module has the PLC CPU and the buffer memories for communications. 4.1 Buffer memo ry Configuration The followings describe buffer memory configuration.
Chapter 4. BUFF ER MEMO RY CONFIGU RATION AND FUNCTION S 4- 2 4.1.2 K4F-PIDA Buff er Memory Address (Decima l) Function Descriptions Default Setting Read / Write 0 Loop enable/dis able Specificati on .
Chapter 4. BUFF ER MEMO RY CONFIGU RATION AND FUNCTION S 4- 3 4.2 Functions of Buffer Me m or y Each address in the buffer memory occupies one word and it is represented with 16 bits.
Chapter 4. BUFF ER MEMO RY CONFIGU RATION AND FUNCTION S 4- 4 4.2.3 Specifying Forward/Reverse Action (K7F-PIDA : Addresses 4, 5, K4F-PI DA : Address 2) 1) T urns the corresponding bit Off(0) for forward action processing and On (1) for reverse action processing.
Chapter 4. BUFF ER MEMO RY CONFIGU RATION AND FUNCTION 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 setting range are given as follows.
Chapter 4. BUFF ER MEMO RY CONFIGU RATION AND FUNCTION 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.
Chapter 5. DEDIC ATED INSTR UCTION S FOR SP ECIAL MODULE 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.
Chapter 5. DEDIC ATED INSTR UCTION S FOR SP ECIAL MODULE S 5 - 2 5.2 Write to Bu ffer Memory ⋅ ⋅⋅ ⋅ ⋅ ⋅⋅ ⋅ ⋅ ⋅⋅ ⋅ PU T, PU T P <Format> execution condition f o r P U T Format Descriptions Available Da ta Type n1 The slot No.
Chapter 6. PROGRAMMING 10 - 1 Chapter 6. PROGRAMMING 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.
Chapter 6. PROGRAMMING 10 - 2 6.1.2 K4F-PIDA SET d ata ar e proc essed wit h trigger ing P 21 w henev er the conte nts in the buff er memories (addre sses: 1,1 ,4,5,10 ~ 41 and 74 ~ 20 2) are c h ang ed.
Chapter 6. PROGRAMMING 10 - 3 6.2 Applic ation Progr ammi ng 6.2.1 A P rogram for Contr olling an Electric Furnace (with Applying the A/D Conversion Module, P ID Control Module and D/A Conversion Modu.
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 .
Chapter 6. PROGRAMMING 10 - 5 5) Program D/A convers i on Module initia lization switch Makin g t he PV of PID contr ol mod ul e be s et to the A/ D convers ion value.
Chapter 6. PROGRAMMING 10 - 6 10.2.2 A Program for Control Using a R TD (with Applying the RTD Input Module, PID Control Module and D /A Conversion Module) 1) System Configuration 2) Initial Settings .
Chapter 6. PROGRAMMING 10 - 7 4) Program RTD RTD in put modu le RTD RTD RTD Readi ng the BCD digi t al Switc h v alue and th en using it as P or I or D v alue Makin g t he PV of PID Contr ol modul e b.
Chapter 6. PROGRAMMING 10 - 8 6.2.3 A Program for Contr ol Using a Thermocouple (with Applying the TC Inpu t Module, PID Control Module a nd D/A Conver sion Module) 1) System Configuration 2) Initial .
Chapter 6. PROGRAMMING 10 - 9 4) Program TC inpu t modu le initializatio n Speci fy ing T C in put mod ul e SET dat a en abl e Speci fying TC of c hannel to K t ype Readi ng the digital conv ersi on val ue of t he T C i nput m odule t o D0 and err or infor mati on to D 1.
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 .
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 Control Module H ardware Defect See Section 7.
Chapter 8. DIMENSIONS 8 - 1 Chapter 8. DIMENSIONS 8.1 K7F-PIDA Dimens ions . K7F-PIDA.
Chapter 8. DIMENSIONS 8 - 2 8.2 K4F-PIDA Dimensions K4F-PIDA.
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