13 MPS, MRD and MPP | Mitsubishi Electronics FX1S guide

FX Series Programmable Controllers

Basic Program Instructions 2

2.13MPS, MRD and MPP

FX1S

FX1N

FX2N

FX2NC

Mnemonic	Function	Format	Devices	Program steps
MPS	Stores the current
MPS	result of the		N/A	1
(Point Store)	internal PLC		N/A	1
(Point Store)	internal PLC	MPS
	operations	MPS
	operations
MRD	Reads the current
MRD	result of the		N/A	1
(Read)	internal PLC		N/A	1
(Read)	internal PLC	MRD
	operations	MRD
	operations
MPP	Pops (recalls and
MPP	removes) the		N/A	1
(PoP)	currently stored		N/A	1
(PoP)	currently stored	MPP
	result	MPP
	result

Basic points to remember:

-Use these instructions to connect output coils to the left hand side of a contact.

Without these instructions connections can only be made to the right hand side of the last contact.

-MPS stores the connection point of the ladder circuit so that further coil branches can recall the value later.

-MRD recalls or reads the previously stored connection point data and forces the next contact to connect to it.

-MPP pops (recalls and removes) the stored connection point. First, it connects the next contact, then it removes the point from the temporary storage area.

-For every MPS instruction there MUST be a corresponding MPP instruction.

-The last contact or coil circuit must connect to an MPP instruction.

-At any programming step, the number of active MPS-MPP pairs must be no greater than 11.

MPS, MRD and MPP usage:

• When writing a program in ladder format, programming tools automatically add all MPS, MRD and MPP instructions at the program conversion stage. If the generated instruction program is viewed, the MPS, MRD and MPP instructions are present.

•When writing a program in instruction format, it is entirely down to the user to enter all relevant MPS, MRD and MPP instructions as required.

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Mitsubishi Electronics FX1S manual 13 MPS, MRD and MPP, MPS, MRD and MPP usage

Contents

Programming Manual Page Foreword FX Series Programmable Controllers FX Series Programmable Controllers FAX Back Combined Programming Manual J FX Series Programmable Controllers Software Warnings Hardware Warnings FX 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 Overview Introduction What do You Need to Program a PLC? What is a Programmable Controller? Current Generation CPU all versions Special considerations for programming equipment Manual name Number FX Base Unit Hardware Assocciated Manuals Manual name Number FX DU, GOT and DM units Memo Basic Program Instructions FX Series Programmable ControllersBasic Program Instructions What is a Program? Outline of Basic Devices Used in ProgrammingDetailed device information Example How to Read Ladder Logic Load, Load Inverse OUT instructionProgram example Out Timer and Counter Variations Use of dual coils Last coil effectDouble Coil Designation Peripheral limitations And, And Inverse ORI Or, Or Inverse Single Operation flags M2800 to M3071 Load Pulse, Load Trailing Pulse LDF ANF OUT Pulse, And Trailing Pulse ORF ORB Or Pulse, Or Trailing Pulse Or Block Batch processing limitationsSequential processing limitations ANB Block MPS, MRD and MPP usage 13 MPS, MRD and MPP Multiple program examples MCR Master Control and Reset Nested MC program example Resetting timers and counters Set and Reset Timer, Counter Out & Reset Retentive timers16.1Basic Timers, Retentive Timers And Counters High Speed Counters Bit countersAvailability of devices Normal 32 bit Counters Leading and Trailing Pulse PLF Usages for INV Inverse No Operation No Operation Program scan 20 End Memo STL Programming FX Series Programmable ControllersSTL Programming General note What is STL, SFC And IEC1131 Part 3? How STL Operates Each step is a programLook Inside an STL Activating new states How To Start And End An STL ProgramCombined SFC Ladder representation Embedded STL programs Initial Steps Terminating an STL ProgramReturning to Standard Ladder Moving Between STL Steps Using SET to drive an STL coil Using OUT to drive an STL coil OUT is used for loops and jumpsOut is used for distant jumps Basic Notes On The Behavior Of STL programs Rules and Techniques For STL programs T001 K20 K50 Single Signal Step Control Method 1 Using locking devicesMethod 2 Special Single Pulse Flags Restrictions Of Some Instructions When Used With STL Using ‘jump’ operations with STLRestrictions on using applied instructions STL OUT SET Using STL To Select The Most Appropriate Program Limits on the number of branches Using STL To Activate Multiple Flows Simultaneously Limits on the number of branches Instruction Format General Rules For Successful STL Branching General Precautions When Using The FX-PCS/AT-EE Software Simple STL Flow Programming Examples SET STL Identification of normally closed contacts Selective Branch/ First State Merge Example Program Points to note Full STL flow diagram/program Advanced STL Use Devices in Detail FX Series Programmable ControllersDevices in Detail Device Mnemonic Configuration detailsInputs Available devices Outputs Device Mnemonic YAlias O/P Auxiliary Relays Device Mnemonic MGeneral Stable State Auxiliary Relays External loads Battery Backed/ Latched Auxiliary Relays Special Single Operation Pulse Relays Special Diagnostic Auxiliary Relays State Relays Device Mnemonic SGeneral Stable State State Relays PLC FX 1S FX 1N FX 2N Battery Backed/ Latched State Relays IST instruction Assigned statesMonitoring STL programs STL/SFC programming Annunciator Flags Device Mnemonic P PointersJumping to the end of the program Device availability Pointer position Interrupt PointersAdditional applied instructions Nested levels Timer Interrupts Rules of useInput Interrupts Disabling Individual Interrupts Driving special auxiliary relaysDisabling high speed counter interrupts Additional notes Example device usage N/A Constant KConstant H Device Mnemonic K Timers Timer accuracyDevice Mnemonic T General timer operation Selectable TimersDriving special auxiliary coils Retentive Timers Using timers in interrupt or ‘CALL’ subroutines Condition Internal timer accuracyTimers Used in Interrupt and ‘CALL’ Subroutines Timer Accuracy Device Mnemonic C Setting ranges for countersCounters High speed counters General/ Latched 16bit UP Counters Battery backed/latched counters Battery backed/ latched counters Selecting the counting directionGeneral/ Latched 32bit Bi-directional Counters Further uses None Basic high speed counter operation Basic High Speed Counter Operation Driving high speed counter coils Input assignment Counter SpeedsAvailability of High Speed Counters Calculating the maximum combined counting speed on FX1S Using the SPD instruction Device specificationSetting range Direction setting RST Device size 11.5 2 Phase Bi-directional Counters C246 to C250 11.6 A/B Phase Counters C252 to C255 Data Registers Device Mnemonic DExample device usage None Data register updates Data retentionGeneral Use Registers Special Diagnostic Registers Using the FX2-40AW/APUse of diagnostic registers Battery Backed/ Latched Registers Program memory registers Special caution when using FX1SWriting to file registers File Registers Uses Externally Adjusted Registers Available forms Index RegistersUse of Modifiers with Applied Instruction Parameters Device Mnemonic V,Z Using Multiple Index Registers Modifying a ConstantMisuse of the Modifiers Bit Devices, Individual and Grouped Bits, Words, BCD and Hexadecimal Moving grouped bit devices Assigning I/OAssigning grouped bit devices Interpreting Word Data Word Devices FX Series Programmable Controllers Word Data Summary Binary Coded Decimal value= Error Inverted7 Additional1 14.4 Two’s Compliment Some useful constants Floating Point And Scientific Notation Scientific Notation Floating Point Format FLT