Scan Program execution Interrupt contact on | Hitachi NJI-350B

Chapter 9 PLC Operation

(3)Continuation of operation after a congestion error occurred

If an interrupt scan congestion error occurs when the special internal output bit R7C2, which specifies whether the operation should continue after a congestion error, is turned on, the interrupt scan is started anew and the scan is executed from the beginning again. Therefore, if the operation continuation specification of the normal scan is Off under the conditions where interrupt inputs are frequently entered from the external source, this scan is stopped as a normal scan congestion error. If the operation continuation specification of the normal scan is On, only interrupt scans are continuously executed depending on the condition of the interrupt congestion error. Care must be taken because normal scans are not executed under this condition.

Periodical system processing

Interrupt Interrupt analysis

scan processing Interrupt scan

Normal END scan processing

INT16

R7C0 On/R7C2 On: Continue

R7C0 Off/R7C2 On: Stop

scan	Program execution

Interrupt contact on

INT16

INT16

Interrupt contact on

Interrupt contact on

Congestion check time

Figure 9.14 Operation when operation continuation at congestion error is set

9-7

Image 240

Hitachi NJI-350B manual Scan Program execution Interrupt contact on, Interrupt contact on Congestion check time

Contents

Application Manual Page Limited Warranty and Imitation of Liability Page Safety Precautions Required Prohibited Page Table of Contents Input/Output Setting High-Speed Counter Single-PhaseHigh-Speed Counter Two-Phase Counter Memory Size and Memory Assignment Connecting to the Ports Syntax and Assembler Error CodesOperation Error Codes Error Display and Actions Memo Remote maintenance through modem connection Easily adjustable potentiometerMaintaining programs without a battery Compliant with overseas specifications as standard Memo System Overview 23,28-point type system configuration diagram Device name Description Chapter Function and Performance Specifications General Specifications Function Specifications Timer counter is provided internallyDevice that has been connected WR, DR Off to stop operation Is running, operation stops and the outputs are aborted OFF General purpose port R7EC Interrupt input Performance Specifications Calculation Specifications Input Specifications Circuit diagramSpecification OFF → on Output Specifications Y100 of EH-*23DRP/A23DRT/*28DRP/*28DRT Output specification Ms max 24 V DC 0.2A Load current Common Output Ms max 24 V DC 0.2A Response timeNumber of output points See Chapter Number of common Maximum Circuit Load current Common Output Externally supplied power Ms maxMaximum Circuit A 240 V AC Load current Common At 1 cycle or less/common High-Speed Counter Specifications PWM Output/Pulse Train Output SpecificationsAnalogue Input Specifications Point and 28-point type 10/14/28-point Relay Output Analogue Output Specifications Circuit diagram 23 points typeCircuit diagram Analog expansion unit Module type Points type module Analog exp. unit Potentiometer Analogue Input Specifications Interrupt Input SpecificationsBackup Expansion Clock Function Power Supply for Sensor Product lineup Others Model 10-Point Basic Unit Name and function of each part TypeDetailed explanation Remarks 14-Point Basic Unit EH-*14 23-Point and 28-Point Basic Unit EH-*23 EH-*28To the right Expansion Unit Name and function of each part Terminal Layout and Wiring Power supply 24V DC Load power supply 24V DC 100-240V ACRUN AC power supply 100-240V AC Load power supply 24V DC DC power supply 24V DCAC power supply Input Power supply 24V DC 12/24V DC Power supply 24V DC Output Load power supply 12/24V DC Power supply 24V DC Output Load power supply 12/24V DC WRF06E Output Power supply 100-240V AC Output Power supply 24V DCPower supply 24V DC Output Output Power supply 100-240V AC Input Output24V DC 12/24V DC Input Output Power supply 100-240V AC Load power supply 24V DC, 100-240V AC Output EH-D6EAN Example of current input and current output Current input ⋅IO6 OC7 VO7 OC6 VO6 IO7 Weights and Power Consumption Type Weight100V AC 264V AC 24V DC Normal Rush Exterior Dimensions 140 150 Memo Instruction Classifications List of InstructionsInstruction classification table Description Type TD, SS, CU, CT NandTD, SS, CU CTU, CTD, CL RES Basic instructions timer, counter Basic instructions relational box WX, WY, WRDX, DY, DR Item number Ladder symbol Instruction symbol BCD DR, DMWR, WM Number Instruction symbol Process descriptions Instruction symbol Process descriptions Name WY, WR, WM Processing time when n=1 BCD →WM, TC FUN instructions PWM BOX Instruction Specification Details Item number Ladder format Condition codeRemark Bit Word Double word Constant Usable I/O Basic instructions-3 Contact serial connection AND, ANIANI Basic instructions-5 Contact parallel connection OR, ORICondition ORI Basic instructions-7 Negation notInstruction format Not Basic instructions-8 Leading edge detection and DIF, or DIFDIF n Number To 511 Decimal Basic instructions-9 Trailing edge detection and DFN, or DFNDFN n Bit Word Double word Usable I/O Other Usable I/O Bit Word Double word Constant OtherWX WY WM DX DY TD, SS Set start/reset cancel master control MCS, MCR Basic instructions-13Remark Upper case MCS Ladder format MPSMRD MPP Basic instructions-18 Logical block serial connection ANBSee Function column Basic instructions-19 Logical block parallel connection ORB Basic instructions-20 Processing box start and end Processing BOXBit Word Indicates the start and end of the processing box Basic instructions-21 Relational box start and end Relational BOXFunction Indicates the start and end of the relational box On delay timer on Delay Timer Basic instructions-22OUT TD n t s Time chart Basic instructions-23 Single shot Single ShotOUT SS n t s TMR, CU SS11 turns off when set value ≥ progress value Progress value is updatedConditions are ignored because it uses edge trigger SS11 is turned on at the leading edge of X00001 again, Basic instructions-24 Counter CounterOUT CU n s Counter number To 255 Decimal Set value To 65535 Decimal Ignored X00005 CL15 CU15 Set value Progress Value CU15 TC15 UP/DOWN Counter CTU17 Basic instructions-27 Counter clear Counter ClearOUT CL n s Counter number To 255 Decimal Word Double word Command format Condition StepsDouble word LD, and s1S==s2 Or s1S==s2 When WR0000 ≠ WR0002, R003 turns on Basic instructions-30Relational box Relational BOX 26.8 Lower case DW BOX Double word LD, and s1Ss2 Or s1Ss2 When WR0000 WR0002, R005 turns on Basic instructions-32Word See Notes 37.5 Double word S1 s2 Steps When DR0000 DR0002, R006 turns on signed Basic instructions-33SignedRelational box Signed Relational BOX Off When WR0000 ≤ WR0002, R007 turns on Basic instructions-34≤ Relational box ≤ Relational BOX S1 = s2 Double word LD, and s1S=s2 Or s1S=s2 Arithmetic instructions-1 Substitution statement Assignment Statement= s See following table X00001 Substituted into WR0000 at the leading edge of inputDesignated by WR0000 + WM000 Arithmetic instructions-2 Binary addition Binary AdditionWord Double word Substitution destination Augend Addend Arithmetic instructions-3 115 Lower case DWWord 177 Double word Arithmetic instructions-4 Binary subtraction Binary SubtractionSubstitution destination Minuend Subtrahend Positive Negative Arithmetic instructions-5 BCD subtraction BCD Subtraction104 Lower case DW Word 163 Double word Arithmetic instructions-6 Binary multiplication Binary MultiplicationWord 112 Double word Substitution destination Multiplicand Multiplier Arithmetic instructions-7 BCD multiplication BCD Multiplication164 Lower case DW Word 447 Double word Signed binary multiplication Signed Binary 143Multiplication Arithmetic instructions-9 Binary division Binary Division= s1 / s2 = s1 / s2 Word 110 Double word Arithmetic instructions-10 BCD division= s1 B/ s2 152 Lower case DW Arithmetic instructions-11 Signed binary division= s1 S/ s2 101 Arithmetic instructions-12 Logical or= s1 or s2 Upper case B Arithmetic instructions-13 Logical= s1 and s2 = s1 and s2 Bit, word Double word Arithmetic instructions-14 Exclusive or= s1 XOR s2 = s1 XOR s2 Bit, word Double word Arithmetic instructions-15 = Relational expression= s1 == s2 = s1 == s2 Is a word Is a double word Signed = Relational expression = s1 S== s2108 = s1 S== s2 Is a double word Arithmetic instructions-17 = s1 s2= s1 s2 Is a word Is a double Word Bit Double word Signed Relational expression = s1 S s2= s1 S s2 Is a double word Arithmetic instructions-19 = s1 s2 Is a word Is a double word Arithmetic instructions-20 Arithmetic instructions-21 ≤ Relational expression= s1 = s2 = s1 = s2 Is a word Is a double word Signed ≤ Relational expression = s1 S= s2= s1 S= s2 Is a double word Application instructions-1 Bit setBset d, n Bit location to be set Constant is set Decimal Bit reset Application instructions-2Bres d, n Application instructions-3 Bit testBTS d, n Also, the 20th bit of DR0102 is reset to 0 by Bres Also, the 20th bit of DR0104 is checked by BTS Application instructions-4 Shift rightSHR d, n After execution DIF1 Application instructions-5 Shift leftSHL d, n Application instructions-6 Rotate rightROR d, n Application instructions-7 Rotate leftROL d, n B31 DR0002 Application instructions-8 Logical shift rightLSR d, n Application instructions-9 Logical shift leftLSL d, n If d is a word Application instructions-10 BCD shift rightBSR d, n Application instructions-11 BCD shift leftBSL d, n Application instructions-12 Block transfer MoveBelow If n is a word Words of data are transferred Application instructions-13 CopyCopy d, s, n Below Copy d, s, n Default value H2020 is set in the range of WR0100 to WR01FE Application instructions-14 Block exchange ExchangeR7F4 R7F3 R7F2 R7F1 XCG d1, d2, n Reverses the contents of d Application instructions-15To be reversed Application instructions-16 Twos complement NegateNEG d To take complement Application instructions-17 Absolute valueABS d, s ABS d, s Word Double word Application instructions-18 Binary → BCD conversionBefore conversion BIN Application instructions-19 BCD → Binary conversionAfter conversion BIN Before conversion BCD Application instructions-20 DecodeAverage 105 115 195 317 481 829 1586 Application instructions-21 Encode128 187 126 Application instructions-22 Bit countNumber of bits set to That counts the bits Set to Application instructions-23 SwapSwap d Swaps the upper 8 bits and lower 8 bits contained in d When n=0, it is not executed When n5, it is not executed Application instructions-24Unit Unity result write Destination I/O Input Point type Output When n=0, it is not executed Application instructions-25Distribute X01001 DIF0 Dist WR0000, WX0000 LD X00001 and DIF0 Control instructions-1 Normal scan end714 Instruction for use 101 Special internal output Error code Error description 102 Control instructions-4 Conditional jumpCU, CT Code number To 255 Decimal Jump condition Syntax of JMP, Cjmp Nesting of JMP instructions is allowed104 Control instructions-5 LabelLBL n WRF001 H0001 Duplicate definition of LBL Control instructions-6 Code number To 49 DecimalFor the instruction instruction, see Next n 106 Control instructions-7 Next107 Syntax of for to Next 108 109 Control instructions-9 Start subroutine programSB n WRF001 H0004 Duplicate definition of SB H0013 SB undefined RTS DER ERR RTS111 Control instructions-11 Start interrupt scan program InterruptTo 2 , 16 to 19 To 27 Decimal Control instructions-12 End interrupt scan program Return Interrupt113 Syntax of SB n, RTS, INT n and RTI Nesting of subroutines is allowed up to 5 levels114 Usable I/O Others Baud rate Value +A Data length Byte +B H80 †† ††=Start code +C H0000 118 Sample program R7E3WR0 DIF0 TRNS/RECV command return code table Name Description Countermeasure Transfer command-2 Recv 0 d, s, t064 122 123 General purpose port switching FUN instructions-1Argument 124 FUN instructions-2 Refresh All points432 Argument dummy FUN instructions-3 Refresh Input/output244 Input type 127 128 FUN instructions-5 High-speed Counter Operation Control147 Argument Counter Number, operation Control value FUN instructions-6 High-speed Counter Coincidence Output Control138 Argument Counter Number, output Instruction 131 High-speed Counter Current Value Replacement Argument counter Number Replacement value Storage areaFUN instructions-8 Rewrite the count value of the counter No to FUN instructions-9 High-speed counter current value reading132 Argument counter Number Current value storage Area 134 High-speed counter preset FUN instructions-11162 135 136 137 FUN instructions-13 173138 139 FUN instructions-14 Pulse output control149 Argument Pulse output Number Pulse frequency output setting changes FUN instructions-15217 141 142 FUN instructions-16 Pulse output with acceleration/deceleration919 143 144 145 146 Usable I/O classifications and point types I/O Assignment Type Assignment Point Shows a diagram outlining this series of operations External I/O Numbers List of external I/O classification and data type Classification Data type RemarksList of I/O number conventions for external I/O Data type Numbering convention Example Internal Output Numbers WR0DR0 WM0 Lists the programming specifications for the MICRO-EH Memory Size and Memory AssignmentSram Flash Programming Devices Following methods are used to create the user programs System configuration using a personal computer Programming MethodsLadder Editor WVCB02H WPCB02H Out-line of opera-ting procedure Situation Point List of procedures for creating a programModify Test operation, adjustment On-line On-direct Size of one circuit Example when using loop symbols Example when using a processing box Program Transfer WRF01A WRF03CWRF03D WRF06B Initial Setting for Special Input/Output Function Change individual setting Store the settings in the memoryInput/Output Function Operation Mode Operation mode list Input/Output Setting Special internal output for setting detailed function Y100 Group „ Mode setting Y101 Y102 Group 2 Group „ In/output setting„ Outline „ Example Pulse / PWM Output adjustment Special Output Operation in CPU Stop StatusR7FC toR7FF Counter output High-Speed Counter Single-Phase Operation of Single-Phase CounterBasic operation Preload input operation Current value clear instruction operation Setting of Single-Phase Counter At abnormal setting Individual counter settingWRF058 Counter WRF059 Counter High-Speed Counter Two-Phase Counter Operation of Two-Phase CountersPhase counting mode High ↓ Falling edge ↓ Falling edge Low ↑ Rising edge High ↓ Falling edge High ↑ Rising edge LowHigh ↓ Falling edge Low ↑ Rising edge High Setting of Two-Phase Counter Diagnostic errorWRF072 WRF076 WRF058 Two-phase counter Bit Description PWM Output Operation of PWM Output Setting the PWM Output Setting the PWM output frequencySetting the PWM output on-duty value Setting abnormality Individual PWM output settingWRF058 PWM output WRF059 PWM output WRF05A PWM output Pulse Train Output Operation of Pulse Output Setting of Pulse Output Setting the pulse output frequencySetting the number of output pulses Number of output pulses for pulse output Individual setting of pulse outputs WRF058 Pulse outputWRF059 Pulse output Interrupt Input Digital FilterInterrupt input correspondence table Terminal INT No Input sampling number Potentiometers Analogue Input Analogue Output Sw6 Conversion mode Remarks Analogue Expansion unitSw1 Sw2 Range Remarks Sw3 Sw4 Range Remarks Switch Stop or Specification. a 10-point type CPU becomesRUN mode when the RUN input is On Input on RUN Start Program classification Description Expression Normal Scan Definition and operation Causes of congestion errors at normal scan Scan time Congestion check timeRTI RTI INT0INT0 10 Congestion error at periodical scan 10 ms Periodical Scan Continuation of operation after a congestion error Interrupt ScanStop Scan Program execution Interrupt contact on Interrupt contact on Congestion check time Relationship of Each Scan Type INT16 INT17 INT18 INT27List of interrupt label Interrupt label Cause of startup Online Change in RUN Conditions for performing program change while runningCPU Halt time Instantaneous Power Failure Powering onInstantaneous power failure actions RUN OFF Function Description When to use the function Operation Parameter Forced Set/Reset Test OperationForced Output Installation Installation location and environmentInstalling the unit Mounting to a DIN rail 10-2 Wiring Separation of the power system10-3 Wiring to the power module Unit Screw Clamping10-4 Wiring to the input terminals DC input AC input 10-5 Wiring to the output terminals Relay output Transistor outputEH-*XXDT Transistor output Source type Life characteristics 125 V AC 10-7 Wiring to the unit terminals 10-8 Communication port specification Port functionPort Ascii Off H8000 Transmission procedure 4800 bps Remarks11-2 Port 2 specifications Setting portBit WRF03D Initial value 11-3 General purpose port Port 1,2 1n station communication on RS-485Port 2 hardware 11-4 Configuration AT CommandsModem Control Function List of commands extract Command Function overview ExampleRegister Set value Function Number format Word format Sequence 11-7 Connecting to the Ports Port Case of RS-422 Connection for 1n station communication by RS-485 11-9 11-10 Error Codes Error Error name Classifi Code Detection timing CationR7CF Failure detection Syntax and Assembler Error Codes LBLFor INT Operation Error Codes CALJMP Cjmp Name Meaning Description Setting Resetting Condition Bit Special Internal Output AreaR7CB R7CE 12-6 12-7 List of special internal outputs that can be stored Special internal output Function That can be storedWRF07B WRF07C WRF07D WRF07E Setting Resetting Condition 12.5Name Storage data 12-9 Name Storage data Description Setting 12-10 PI/O function Individual setting Request Name Stored data Description12-11 Name Stored data Description Setting Resetting 12-12 Error Display and Actions 13-1Ladder Editor 13-2 Process flow when an error occurred is shown below Error code Error name Corrective action13-3 13-4 Checklist when Abnormality Occurred 13-5 Procedures to Solve Abnormality CPU LED, I/O LED13-6 Power supply check 13-7 13-8 13-9 13-10 Assignment error is generated, but data is read Data cannot be entered13-11 13-12 13-13 CPU operates, but output signals are not detected Assignment error occurred, but output is normal13-14 13-15 13-16 Operation verification procedures Peripheral unit name FormDetailed operation example 14-1 E P 1 Starting the Ladder Editor for Windows 14-2 Select H-302 for the CPU type setting E P 2 InitializationMenu bar 14-3 Assign in the Menu bar 14-4 Setting from the I/O Assign List 14-5 Setting from the Slot Setting Status 14-6 E P 3 Program Input Click the OK button. The dialogue closes14-7 Click the OK button in the Processing Box 14-8 Input I/O No., time base, and the first setting value M, Y, TD, SS, WDT, MS, TMR, CU, RCU, CTU, CTD, CL14-9 Input comparison expression and comment Click the OK button Click the circuit write icon Tool bar14-10 E P 4 Checking Program Errors 14-11 E P 5 Saving the Program 14-12 E P 6 Program Transfer to CPU 14-13 Click File → CPU write in the Menu bar 14-14 E P 7 Monitoring Verifying the Operation I/O Monitor dialogue box is displayed14-15 Click the icon in the Symbol bar I/O monitor can be specified in the following two waysMonitor and display 16 points from Y100 14-16 Normal status Main cause of error Life of the power moduleDaily inspection Items for daily inspection Life of the battery How to replace the battery15-2 LDI ANIORI Not EH-150 200 250 252 2000 2002 4010 700 1002 300 702 302 Arithmetic instructions Instruction Instruction name Application instructions 2/2 Instruction Instruction name Free FUN instructions 1/5 Instruction Instruction name FUN instructions 2/5 Instruction Instruction name FUN instructions 3/5 Instruction Instruction name FUN instructions 4/5 Instruction Instruction name FUN instructions 5/5 Instruction Instruction name Appendix 2 Standards Standards