Uses, Externally Adjusted Registers | Mitsubishi Electronics FX1S

Setting pot of an FX1S

RUN

STOP

FX Series Programmable Controllers

Devices in Detail 4

4.12.5Externally Adjusted Registers

The FX1S and FX1N have built in “setting

pots” which are used to adjust the contents of certain dedicated data registers. The contents of these registers can range from 0 to 255. This is a built in feature and requires no additional setup or programming.

The FX2N and FX2NC do not have this feature, however, an additional special function unit is available which provides

the same function. The unitrequired is the FX2N -8AV-BD. For use, this unit requires the applied instructions VRRD

function 85 (Volume Read) and VRSC function 86 (Volume Scale).


		FX1S		FX1N	FX2N	FX2NC
			2 points,
	Number of	plus 8 points: Supplied by using			8 points: Supplied by using the
	Number of	the additional special function			additional special function board
	setting pots	the additional special function			additional special function board
	setting pots		board		FX2N-8AV-BD
			board		FX2N-8AV-BD
		FX2N-8AV-BD

			1: D8030
	Number of		2: D8031		Selected by the user when
	Number of	Additional 8 points selected by			Selected by the user when
	controlled	Additional 8 points selected by			applied instructions VRRD and
	controlled	the user when applied			applied instructions VRRD and
	data registers	the user when applied			VRSC are used.
	data registers	instructions VRRD and VRSC			VRSC are used.
		instructions VRRD and VRSC
			are used.

Uses:

• This facility is often used to vary timer settings, but it can be used in any application where a data register is normally found, i.e. setting counters, supplying raw data, even selection operations could be carried out using this option.

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Mitsubishi Electronics FX1S manual Uses, Externally Adjusted Registers

Contents

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