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Schneider Electric SR2MAN01 Presentation of Ladder Diagrams, Description, Ladder diagram

Models: SR2MAN01

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Implementing a Basic Application

Presentation of Ladder Diagrams

Description	In this section, we will use a simple example to understand how a ladder diagram
	works: A two-way switch.

	Normal electrical diagram	Ladder diagram


			I1-i2	----------[Q1
			I1-i2	----------[Q1
			i1-I2
			i1-I2


	The two position switches VV1 and VV2	I1 and I2 are two contacts representing inputs
	control turning lamp L1 on and off.	1 and 2 on the smart relay.
		Q1 is a coil that corresponds to output 1 from
		the smart relay.

150	SR2MAN01 11/2007

Page 135

Image 135

Schneider Electric SR2MAN01 Presentation of Ladder Diagrams, Description, Implementing a Basic Application, Ladder diagram

Contents

SR2MAN01 11/2007 Zelio Logic Smart Relay User ManualChapter 1 Initial Power up and Discovering Table of ContentsPart I Initial Power up and Discovering Part II Functions Accessible from the Front PanelChapter 9 CLEAR PROGRAM Menu Chapter 8 CONFIGURATION MenuChapter 13 DEFAULT Menu Part III LD LanguageAppendices Part V DiagnosticsChapter 21 Diagnostics Part IV Creating and Debugging an ApplicationSafety Information Important InformationDANGER Safety Information 2007 Schneider Electric. All Rights ReservedSR2MAN01 11/2007 At a Glance About the BookSubject of this Initial Power up and DiscoveringPresentation Initial Power up and DiscoveringTopic Initial Power up and DiscoveringPresentation Subject of this Chapter Whats in this Chapter?Preliminary Advice SafetyRISK OF ELECTRIC SHOCK OR FIRE DANGERRISK OF ELECTRIC SHOCK, EXPLOSION OR ELECTRIC ARCING RISK OF EXPLOSIONRISK OF UNEXPECTED OPERATION INVOLUNTARY OPERATION OF EQUIPMENTIntroduction Description of the Smart Relay Front Panel Presentation of the Smart Relay Front PanelElement Description of the LCDMenu / OK PromptPOSSIBLE Characteristics and ConnectionsInitial Power up and Discovering RECOMMENDEDShift Key Control Keys on the Front Panel of the Smart RelayDescription Menu / OKThe navigation keys are used to move left or right, down or up z Round for a link only in programming modeZx Keys are marked above the keysIllustration ContextualMenus contextual menu appearsStep Action ExamplesIntroduction Language Selection Menu / OKView Menu / OKMenu / OK Step ActionView Initial Power up and Discovering5 Return to the INPUT-OUTPUT screen using the left navigation key Step ActionStep Action Modification of Date and HourMenu / OK Menu / OKV E R S I O N L A N G U A G E D E F A U L T C H A N G E D / H Menu / OKStep Action ViewChapter Functions Accessible from the Front PanelAt a Glance Subject of this Section Whats in this Part?Description Accessible from the Front PanelFunctions Accessible from the Front Panel of the Smart Relay Overview of the FunctionsConfiguring Differences Between LD and FBD ModesExtensions Topic Input/Output ScreenAt a Glance Subject of this Chapter Whats in this Chapter?Inputs-Outputs Screen DescriptionMenu / OK Main Menu Access to theDescription TEXT and DISPLAY screenpreset value, etc. on the LCD display instead of the INPUTS-OUTPUTS Switching Between the ScreensResult Param is displayed at the bottom of the screen Menu / OKStep Press the Shift key white key to display the contextual menuMenu / OK PROGRAMMING MenuPresentation Subject of this ChapterTopic Whats in thisChapter? PROGRAMMING MenuRules for Entering Ladder Diagrams I1-H1-C1-M1- T2- CC1 I2 Z1 Z3Description Rules IncorrectCorrect Method for Entering a Contact or Coil Description Entering an ElementMenu / OK Modifying an element Initialization Deleting an Element Menu / OK Entering a LinkNote Accessible only in LD mode / smart relay in STOP mode Description Entering a LinkDeleting a Link Replacing a Link with a Contact Description Accessibility of parameters Entry of Function Block ParametersModifying the Parameters of Existing Blocks Entering Parameters on Creation of the Blockins. - + Param Del Menu / OKDeletion Deletion and Insertion of Diagram LinesNote Accessible only in LD mode / smart relay in STOP mode deletion of all the control diagram linesDescription PARAMETERS MenuPARAMETERS Menu LD modez From the PARAMETERS see PARAMETERS Menu, p. 51 menu FBD mode Parameter ModificationRUN Mode Parameters inMONITORING Menu MONITORING MenuDescription Parameter Modification To modify the parameters, proceed as followsStep Action W I T H L A T C H I N G I N I T RUN/STOP MenuRUN/STOP Menu R U N P R O GOff Smart Relays Without Screen S T O PP R O G Y E SSubject of this Chapter Whats in this Chapter? CONFIGURATION MenuNote The CONFIGURATION menu is only available in STOP mode Presentation0 0 0 PASSWORD MenuP A S S W O R D E N T E RInitially, the key is not displayed and each digit is set to Entering PasswordThe ENTER message appears in the window Entry procedure PasswordIllustration PasswordIllustration Menu / OKDescription Filter-Type Selection FILTER MenuM O N 2 2 S E P 1 5 5 Zx KEYS Menu1 2 3 4 5 S T O P L DC Y C L E = 0 5 x 0 2 m S WATCHDOG CYCLE MenuDescription IllustrationActions Cycle Time WATCHDOG Configuration The WATCHDOG can perform the following different actionsC Y C L E = 0 5 x 0 2 m S Description Clearing the Program CLEAR PROGRAM MenuCLEAR PROG Menu Note Accessible only in LD modeIllustration TRANSFER MenuTRANSFER Menu DescriptionTRANSFER Menu Module → Backup Memory TransferBackup Memory → Module Transfer incompatible z Absence of backup memoryz Configurations of the hardware and program to transfer incompatible ApplicationUse of SR2 MEM01 and SR2 MEM02 Illustration VERSION MenuVERSION Menu DescriptionF I R M W A R E 0 1 . 0 E X TX T 1 4 1 B D H A R D W A R E 0 1 . 0F R A N C A I S LANGUAGE MenuLANGUAGE Menu E N G L I S HDescription DEFAULT MenuFAULT Menu Reset to Zero of the Fault Counter053 Link fault between smart relay and bus-type extension Fault TypesNumber Type of fault 000 No faults 001 Fault in writing to EEPROM 002 Clock write faultNumber Type of fault Illustration CHANGE DATE/TIME MenuCHANGE DATE/TIME Menu DescriptionClock Configuration ExampleSteps Description E U R O P E CHANGE SUMMER/WINTER MenuCHANGE SUMMER/WINTER Menu C H A N G E S U M / W I NConfiguration of the Time Change To configure automatic time change, proceed as followsStep Action Chapter LD LanguageAt a Glance Subject of this Section Whats in this Part?Topic LD Language ElementsAt a Glance Subject of this Chapter Whats in this Chapter?Description IntroductionLadder Diagrams DiagramDescription Discrete InputsNormally open mode Normally closed modeInitialization Modification ofthe state of a contactDescription Zx KeysNormally open mode Normally closed modeInitialization Modification ofthe State of a ContactDescription Auxiliary RelaysUnlatch mode Contactor modeImpulse relay mode Latch modeNormally open mode Symbol of an auxiliary relay, used as a contact in normally open modeNormally closed mode Modifying the Mode of a Coil or a Contact ExampleInitialization Latching Description Discrete DISCR OutputsContactor mode Impulse relay modeUnlatch mode Latch modeInitialization Normally open modeNormally closed mode Modifying the Mode of a Coil or a ContactDescription TimersReset input z Coil TT Command Inputz Coil RC Reset Input Command inputNormally open mode Normally closed modeType of timer H M Preset valueTime unit M SMenu / OK LatchingM S A = 0 0 2 0 B = 0 0 4Off delay type C Active, control held down type AActive, Press to start/stop type a A/C Combination of A and C The following diagram shows the operation of the type A/C timerThe following diagram shows the operation of the type B timer The following diagram shows the operation of the type W timerFlasher unit, control held down asynchronously type L Note each pulse on the TTx input resets the current timer value toFlasher unit, control held down synchronously type D Flasher unit, Press to start/stop, Synchronous type dInitialization Modifying the Mode of a Coil or a ContactFlasher unit, Press to start/stop asynchronously type l Time on addition type T0 2 3 ExampleThe stairway light is linked to the Q4 output of the smart relay M SUse of Coils Countersz Coil RC Reset Initial Counter State Input DescriptionI2 DC1 Reset Initial Counter State inputZ1 RC1 Counting direction inputThe contact is conducting as long as Normally open modeSymbol of the normally open contact associated with a counter Normally closed modePreset value Type of countingParameter lock Menu / OK LatchingT T O P = 0 0 1 7Current counter value Modifying the Mode of a Coil or a Contactvalue Current counterThe counter is incremented each time input I1 is activated Initializationz The current value is zero ExamplesDescription Fast CounterReset initial counter state input z coil TK1 Enable function inputz coil RK1 Reset initial counter state input Enable function inputNormally open mode Normally closed modeThe contact is conducting as long as Duration of pulse Preset valuez Repetitive In the TO mode, the current value is reinitialized when it reaches the preset value and in FROM mode, it is reset to the preset value when it reaches zero Cycle typeType of counting Parameter lockNon verrouillé P = + 0 0 0 1 counter reset to its initial stateLatching I = 0 0 0 0Up-Counting in Single Cycle Mode Time £ timing Down-Counting in Single Cycle ModeUp-counting in Repetitive Cycle Mode timingConfirmation Down-Counting in Repetitive Cycle ModeExample Modifying the Mode of a Coil or a ContactInitialization z The current value is zeroConfiguration Counter ComparatorsNormally open mode Normally closed modeDescription Analog ComparatorsNormally open mode Normally closed modeValues to compare Configuration from Front Panelxl Comparison Operator x1 - H ≤ x2≤ x1 + HReference value Hysteresis parameterParameter locking Configuration of a single comparator from the front panel A N A L O G Modifying the Mode of a Coil or a ContactInitialization ExampleNormally closed mode ClocksNormally open mode The contact is conducting when the clock is in a validity periodH M O N Configuration from Front PanelH 1 D / W 0 2 5Programming modes can be mixed for the same clock Example Using the four clock ranges with different modesModifying the Mode of a Coil or a Contact CombiningLD Language Elements Description Textsz Display Activation coil z Display Deactivation coil Display ActivationDisplay deactivation LCD Screen Backlighting DescriptionUsed as a Coil Normally closed mode Change to Summer / Winter TimeAccess Normally open modeNo no change Modifying the Mode of a Coil or a Contact InitializationParameters The following operating modes are possibleto master Modbus Inputs/OutputsDescription ParametersUse of the Coil MessageCommand input DescriptionConfiguration from the Front Panel Initialization Normally open modeNormally closed mode Modifying the Mode of a Coil or a ContactChapter Creating and Debugging an ApplicationPresentation Subject of this Section Whats in this Part?Topic Implementing a Basic ApplicationPresentation Subject of this Chapter Whats in this Chapter?Description Presentation of Ladder DiagramsNormal electrical diagram Ladder diagramOutputs can be used in place of two position switchesI1 I2 I4 I5 I6 I7To illustrate how this function works, we shall use a simple example Using the Reverse Functioninput I wired on the smart relay DescriptionI2 I3 I4 I5 I6 I7 Electrical diagramLadder diagram 1 Light off when idle Practical ExampleImplementing a Basic Application Off delayElectrical diagram Electrical diagramLadder symbol Notation Used by the Smart Relayz Electrical symbols z Ladder symbols z Smart relay symbols Electrical symbolz LCD screen back-light function block This is used to control the backlighting of the LCD by a program Menu / OK Application Implementing a Two-way SwitchDescription Go to the Programming Screen Menu / OKEntering the Contacts in the First Line Step ActionComment The 2 flashes Implementing a Basic ApplicationStep Action ScreenComment Entering the Coil and Joining it to the ContactsStep Action ScreenComment Entering the Contacts in the Second LineStep Action ScreenImplementing a Basic Application Joining the Second Line to the FirstI1-i2----------Q1 i1-IMenu / OK Launching the ProgramMenu / OK Menu / OKTopic Debugging an ApplicationPresentation Subject of this Chapter Whats in this Chapter?Debugging an Application Module in RUN Mode Viewing StatusIntroduction Menu / OKMenu / OK in RUN modeContextual MenusDynamic Mode Ladder Diagrams Viewing Ladder DiagramsChanging Ladder Diagrams SR2MAN01 11/2007 Using Z Keys as PushbuttonsMenu / OK Debugging an ApplicationModifying Dynamic Mode Function Block ParametersAccessing Presentationnot. Here is a summary table Dynamic Mode MenusDynamic Mode MenusSmart Relay Reaction to a Power Failure DescriptionLatching Safety Mode Transferring an Backup and Transfer of Ladder Diagrams19Saving and Transferring Ladder Diagrams DescriptionTopic Sample ApplicationPresentation Subject of this Chapter Whats in this Chapter?Counting Vehicles Open Time SpecificationsObjective Automatic GateButton Specification AnalysisDescription InputsSpecial function blocks Smart relay labelName Description Implementing the Ladder Diagram Implementing the SolutionConfiguring the Function Blocksblocks x 1 = I b = 0 A 1 s A N A L O GI b ≥ R R = 8Presentation DiagnosticsThis chapter will help you find solutions to operating problems DiagnosticsTopic DiagnosticsPresentation Subject of this Chapter Whats in this Chapter?Cause Smart Relay MessagesDescription Messagequestions are listed here Frequently Asked QuestionsDiagnostics DescriptionAnswer Here below are the most frequently asked questions and their answersFrequently Asked QuestionsWhats in this AppendicesAt a Glance IntroductionChapter CompatibilityAt a Glance Subject of thisVersion of the IntroductionCompatibility Smart relay firmware versionIntroduction Program from compatibility is always true the SR2 MEM02Memory Cartridge to the Smart Relay Index SR2MAN01 11/2007 Menu CHANGE DATE/TIME CHANGE SUMMER/WINTER, 83 CLEAR PROGModbus LD I/Os Zx Keys

Implementing a Basic Application

Presentation of Ladder Diagrams

Normal electrical diagram

Ladder diagram

I1 and I2 are two contacts representing inputs

Q1 is a coil that corresponds to output 1 from