Or Block | Mitsubishi Electronics FX1S specification

FX Series Programmable Controllers

Basic Program Instructions 2

2.11Or Block

FX1S

FX1N

FX2N

FX2NC

Mnemonic

Function

Format

Devices

Program steps

ORB

Parallel connection

N/A

1

of multiple contact

(OR Block)

circuits

Program example:

X0 X1

X2 X3

X4 X5

Y6

ORB

ORB

Recommended sequential				Non-preferred batch
programming method				programming method
0	LD	X	0	0	LD	X	0
1	AND	X	1	1	AND	X	1
2	LD	X	2	2	LD	X	2
3	AND	X	3	3	AND	X	3
4	ORB			4	LDI	X	4
5	LDI	X	4	5	AND	X	5
6	AND	X	5	6	ORB
7	ORB			7	ORB	Y	6
8	OUT	Y	6	8	OUT	Y	6

Basic points to remember:

-An ORB instruction is an independent instruction and is not associated with any device number.

-Use the ORB instruction to connect multi-contact circuits (usually serial circuit blocks) to the preceding circuit in parallel. Serial circuit blocks are those in which more than one contact connects in series or the ANB instruction is used.

-To declare the starting point of the circuit block use a LD or LDI instruction. After completing the serial circuit block, connect it to the preceding block in parallel using the ORB instruction.

Batch processing limitations:

• When using ORB instructions in a batch, use no more than 8 LD and LDI instructions in the definition of the program blocks (to be connected in parallel). Ignoring this will result in a program error (see the right most program listing).

Sequential processing limitations:

• There are no limitations to the number of parallel circuits when using an ORB instruction in the sequential processing configuration (see the left most program listing).

2-11

Image 37

Mitsubishi Electronics FX1S manual Or Block, Batch processing limitations, Sequential processing limitations

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 Outline of Basic Devices Used in Programming What is a Program?Detailed device information Example How to Read Ladder Logic OUT instruction Load, Load InverseProgram example Out Timer and Counter Variations Last coil effect Use of dual coilsDouble 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 Batch processing limitations Or BlockSequential 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 Retentive timers Timer, Counter Out & Reset16.1Basic Timers, Retentive Timers And Counters Availability of devices Bit countersNormal 32 bit Counters High Speed 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? Each step is a program How STL OperatesLook Inside an STL Combined SFC Ladder representation How To Start And End An STL ProgramEmbedded STL programs Activating new states Terminating an STL Program Initial StepsReturning to Standard Ladder Moving Between STL Steps Using SET to drive an STL coil OUT is used for loops and jumps Using OUT to drive an STL coilOut is used for distant jumps Basic Notes On The Behavior Of STL programs Rules and Techniques For STL programs T001 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 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 Inputs Configuration detailsAvailable devices Device Mnemonic Device Mnemonic Y OutputsAlias O/P Device Mnemonic M Auxiliary RelaysGeneral Stable State Auxiliary Relays External loads Battery Backed/ Latched Auxiliary Relays Special Single Operation Pulse Relays Special Diagnostic Auxiliary Relays Device Mnemonic S State RelaysGeneral Stable State State Relays PLC FX 1S FX 1N FX 2N Battery Backed/ Latched State Relays Monitoring STL programs Assigned statesSTL/SFC programming IST instruction Annunciator Flags Jumping to the end of the program PointersDevice availability Device Mnemonic P Additional applied instructions Interrupt PointersNested levels Pointer position Rules of use Timer InterruptsInput Interrupts Disabling high speed counter interrupts Driving special auxiliary relaysAdditional notes Disabling Individual Interrupts Constant H Constant KDevice Mnemonic K Example device usage N/A Timer accuracy TimersDevice Mnemonic T Selectable Timers General timer operationDriving special auxiliary coils Retentive Timers Using timers in interrupt or ‘CALL’ subroutines Timers Used in Interrupt and ‘CALL’ Subroutines Internal timer accuracyTimer Accuracy Condition Counters Setting ranges for countersHigh speed counters Device Mnemonic C General/ Latched 16bit UP Counters Battery backed/latched counters Selecting the counting direction Battery backed/ latched countersGeneral/ Latched 32bit Bi-directional Counters Further uses None Basic high speed counter operation Basic High Speed Counter Operation Driving high speed counter coils Counter Speeds Input assignmentAvailability of High Speed Counters Calculating the maximum combined counting speed on FX1S Setting range Device specificationDirection setting Using the SPD instruction RST Device size 11.5 2 Phase Bi-directional Counters C246 to C250 11.6 A/B Phase Counters C252 to C255 Device Mnemonic D Data RegistersExample device usage None Data retention Data register updatesGeneral Use Registers Use of diagnostic registers Using the FX2-40AW/APBattery Backed/ Latched Registers Special Diagnostic Registers Writing to file registers Special caution when using FX1SFile Registers Program memory registers Uses Externally Adjusted Registers Use of Modifiers with Applied Instruction Parameters Index RegistersDevice Mnemonic V,Z Available forms Modifying a Constant Using Multiple Index RegistersMisuse of the Modifiers Bit Devices, Individual and Grouped Bits, Words, BCD and Hexadecimal Assigning I/O Moving grouped bit devicesAssigning 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