Mitsubishi Electronics FX1S manual Load Pulse, Load Trailing Pulse

Page 34

FX Series Programmable Controllers

Basic Program Instructions 2

2.8Load Pulse, Load Trailing Pulse

FX1S

FX1N

FX2N

FX2NC

Mnemonic

Function

Format

Devices

Program steps

 

 

Initial logical

 

 

 

 

 

 

 

LDP

operation -

 

 

 

X, Y, M, S, T, C

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(LoaDPulse)

Rising edge

 

 

 

 

 

 

 

 

 

 

 

 

pulse

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LDF

Initial logical

 

 

 

 

 

 

 

operation Falling

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(LoaD Falling

 

 

 

X, Y, M, S, T, C

2

 

 

/ trailing edge

 

 

 

 

 

pulse)

 

 

 

 

 

 

 

pulse

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Program example:

 

 

 

 

 

 

LDP

X0

M100

X1

LDF

X0

Y0

0 LDP X 0

2 OR X 1

3 OUT M 100 4 LDF X 0 6 OUT Y 0

Basic points to remember:

-Connect the LDP and LDF instructions directly to the left hand bus bar.

-Or use LDP and LDF instructions to define a new block of program when using the ORB and ANB instructions (see later sections).

-LDP is active for one program scan after the associated device switches from OFF to ON.

-LDF is active for one program scan after the associated device switches from ON to OFF.

Single Operation flags M2800 to M3071:

• The pulse operation instructions, when used with auxiliary relays M2800 to M3071, only activate the first instruction encountered in the program scan, after the point in the program where the device changes. Any other pulse operation instructions will remain inactive.

•This is useful for use in STL programs (see chapter 3) to perform single step operation using a single device.

•Any other instructions (LD, AND, OR, etc.) will operate as expected.

For more details please see page 4-5.

2-8

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Contents Programming Manual Page FX Series Programmable Controllers ForewordFX Series Programmable Controllers FAX Back Combined Programming Manual J FX Series Programmable Controllers Hardware Warnings Software WarningsFX Series Programmable Controllers Contents STL Programming Applied Instructions Rotation And Shift Functions 30 to External FX Serial Devices Functions 80 to Execution Times And Instructional 10-1 Viii FX Series Programmable Controllers Chapter Contents Introduction OverviewWhat is a Programmable Controller? What do You Need to Program a PLC?Special considerations for programming equipment Current Generation CPU all versionsAssocciated Manuals Manual name Number FX Base Unit HardwareManual name Number FX DU, GOT and DM units Memo Basic Program Instructions FX Series Programmable ControllersBasic Program Instructions Outline of Basic Devices Used in Programming What is a Program?Detailed device information How to Read Ladder Logic ExampleOUT instruction Load, Load InverseProgram example Timer and Counter Variations Out Last coil effect Use of dual coils Double Coil Designation And, And Inverse Peripheral limitationsOr, Or Inverse ORILoad Pulse, Load Trailing Pulse Single Operation flags M2800 to M3071Pulse, And Trailing Pulse LDF ANF OUTOr Pulse, Or Trailing Pulse ORF ORBBatch processing limitations Or BlockSequential processing limitations Block ANB13 MPS, MRD and MPP MPS, MRD and MPP usageMultiple program examples Master Control and Reset MCRNested MC program example Set and Reset Resetting timers and countersRetentive timers Timer, Counter Out & Reset16.1Basic Timers, Retentive Timers And Counters Normal 32 bit Counters Bit countersAvailability of devices High Speed CountersPLF Leading and Trailing PulseInverse Usages for INVNo Operation No Operation20 End Program scanMemo STL Programming FX Series Programmable ControllersSTL Programming What is STL, SFC And IEC1131 Part 3? General noteEach step is a program How STL OperatesLook Inside an STL Embedded STL programs How To Start And End An STL ProgramCombined SFC Ladder representation Activating new statesTerminating an STL Program Initial StepsReturning to Standard Ladder Using SET to drive an STL coil Moving Between STL StepsOUT is used for loops and jumps Using OUT to drive an STL coilOut is used for distant jumps Rules and Techniques For STL programs Basic Notes On The Behavior Of STL programsT001 K20 K50 Method 1 Using locking devices Single Signal Step ControlMethod 2 Special Single Pulse Flags Using ‘jump’ operations with STL Restrictions Of Some Instructions When Used With STLRestrictions on using applied instructions Using STL To Select The Most Appropriate Program STL OUT SETUsing STL To Activate Multiple Flows Simultaneously Limits on the number of branchesLimits on the number of branches General Rules For Successful STL Branching Instruction FormatGeneral Precautions When Using The FX-PCS/AT-EE Software Programming Examples Simple STL FlowIdentification of normally closed contacts SET STLPoints to note Selective Branch/ First State Merge Example ProgramFull STL flow diagram/program Advanced STL Use Devices in Detail FX Series Programmable ControllersDevices in Detail Available devices Configuration detailsInputs Device MnemonicDevice Mnemonic Y OutputsAlias O/P Device Mnemonic M Auxiliary RelaysGeneral Stable State Auxiliary Relays Battery Backed/ Latched Auxiliary Relays External loadsSpecial Diagnostic Auxiliary Relays Special Single Operation Pulse RelaysDevice Mnemonic S State RelaysGeneral Stable State State Relays Battery Backed/ Latched State Relays PLC FX 1S FX 1N FX 2NSTL/SFC programming Assigned statesMonitoring STL programs IST instructionAnnunciator Flags Device availability PointersJumping to the end of the program Device Mnemonic PNested levels Interrupt PointersAdditional applied instructions Pointer positionRules of use Timer InterruptsInput Interrupts Additional notes Driving special auxiliary relaysDisabling high speed counter interrupts Disabling Individual InterruptsDevice Mnemonic K Constant KConstant H Example device usage N/ATimer accuracy TimersDevice Mnemonic T Selectable Timers General timer operationDriving special auxiliary coils Using timers in interrupt or ‘CALL’ subroutines Retentive TimersTimer Accuracy Internal timer accuracyTimers Used in Interrupt and ‘CALL’ Subroutines ConditionHigh speed counters Setting ranges for countersCounters Device Mnemonic CBattery backed/latched counters General/ Latched 16bit UP CountersSelecting the counting direction Battery backed/ latched countersGeneral/ Latched 32bit Bi-directional Counters Basic high speed counter operation Further uses NoneDriving high speed counter coils Basic High Speed Counter OperationCounter Speeds Input assignmentAvailability of High Speed Counters Calculating the maximum combined counting speed on FX1S Direction setting Device specificationSetting range Using the SPD instructionRST 11.5 2 Phase Bi-directional Counters C246 to C250 Device size11.6 A/B Phase Counters C252 to C255 Device Mnemonic D Data RegistersExample device usage None Data retention Data register updatesGeneral Use Registers Battery Backed/ Latched Registers Using the FX2-40AW/APUse of diagnostic registers Special Diagnostic RegistersFile Registers Special caution when using FX1SWriting to file registers Program memory registersExternally Adjusted Registers UsesDevice Mnemonic V,Z Index RegistersUse of Modifiers with Applied Instruction Parameters Available formsModifying a Constant Using Multiple Index RegistersMisuse of the Modifiers Bits, Words, BCD and Hexadecimal Bit Devices, Individual and GroupedAssigning I/O Moving grouped bit devicesAssigning grouped bit devices Word Devices Interpreting Word DataFX Series Programmable Controllers Binary Coded Decimal value= Error Word Data Summary14.4 Two’s Compliment Inverted7 Additional1Floating Point And Scientific Notation Some useful constantsScientific Notation Floating Point Format FLT
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