Mitsubishi Electric MELSEC-Q00U(J)CPU

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CHAPTER 2 APPLICATION OF PROGRAMMING

2.8 I/O Processing and Response Delay

2.8.1 Refresh mode

In a refresh mode, the CPU module batch-performs I/O processing before the start of sequence program operations.

Input module or

output module

Device memory

X10

On/off

data

On/off data

Input of on/off data by

input refresh

Output of on/off data by

output refresh

CPU module

Main Page

default chapter3
- Safety Precautions3
- Conditions of Use for the Product9
- Introduction10
- Table of Contents12
- Manuals18
- Manual Page Organization21
- Terms23
- Part 1 Programming27
Chapter 1 Basic Procedure for Programming28
- System Configuration Example28
- Creating a Project29
- Creating a Program30
- Prior Knowledge for Creating a Program30
- How to Create a Program31
- Converting a Program32
- Writing a Project to the CPU Module32
- Formatting a Memory32
- Writing to the CPU Module33
- Checking an Operation of the CPU Module34
- Saving a Project36
Chapter 2 Application of Programming37
- Memory and Files37
- Memory Configuration and Storable Data37
- Parameter-Valid Drive44
- Files46
- Base Unit Assignment54
- Base Mode54
- Base Unit Assignment Setting56
- I/O Number Assignment57
- Concept of I/O Number Assignment58
- Setting I/O Numbers61
- I/O Number Setting Example66
- Checking I/O Numbers68
- Scan Time Structure69
- Initial Processing69
- I/O Refresh (Refresh Processing with Input/Output Modules)70
- Program Operation71
- END Processing72
- Operation Processing in the RUN, STOP, or PAUSE Status73
- Operation Processing During Momentary Power Failure75
- Data Clear Processing76
- I/O Processing and Response Delay78
- Refresh Mode79
- Direct Mode82
- Interrupt Program84
- Settings When Program Is Divided90
- Initial Execution Type Program94
- Scan Execution Type Program96
- Stand-By Type Program97
- Fixed Scan Execution Type Program100
- Changing the Program Execution Type104
- Boot Operation106
- Programming Language109
- Communications with Intelligent Function Modules110
- Access to the Ans/A Series Special Function Modules112
Chapter 3 Functions113
- Function List114
- Constant Scan121
- Latch Function124
- Output Mode at Operating Status Change (STOP to RUN)127
- Clock Function129
- Remote Operation133
- Remote RUN/STOP133
- Remote PAUSE136
- Remote RESET138
- Remote Latch Clear139
- Relationship between Remote Operation and RUN/STOP Status of the CPU Module140
- Q Series-Compatible Module Input Response Time Selection (I/O Response Time)141
- Error Time Output Mode Setting143
- H/W Error Time PLC Operation Mode Setting144
- Intelligent Function Module Switch Setting145
- Monitor Function147
- Monitor Condition Setting148
- Local Device Monitor/Test153
- External Input/Output Forced On/Off156
- Executional Conditioned Device Test161
- Writing Programs While CPU Module Is in RUN Status170
- Online Change (Ladder Mode)170
- Online Change (Files)173
- Precautions for Online Change175
- Execution Time Measurement182
- Program Monitor List182
- Interrupt Program Monitor List182
- Scan Time Measurement183
- Sampling Trace Function186
- Debug from Multiple Programming Tools191
- Simultaneous Monitoring from Multiple Programming Tools192
- Online Change from Multiple Programming Tools194
- Watchdog Timer (WDT)195
- Self-Diagnostic Function197
- Leds Indicating Errors204
- Clearing Errors204
- Error History207
- Security Function208
- Password Registration208
- File Password 32210
- File Access Control by Security Key215
- Remote Password220
- LED Indication223
- Methods for Turning off the Leds223
- LED Indication Priority224
- High-Speed Interrupt Function226
- High-Speed Interrupt Program Execution Function227
- High-Speed I/O Refresh Function and High-Speed Buffer Transfer Function228
- Precautions230
- Interrupt from Intelligent Function Module233
- Serial Communication Function234
- Service Processing242
- Service Processing Setting242
- Initial Device Value248
- Battery Life-Prolonging Function251
- Memory Check Function252
- Program Cache Memory Auto Recovery Function253
- Latch Data Backup to Standard ROM255
- Writing/Reading Device Data To/From Standard ROM260
- CPU Module Change Function with Memory Card261
- Data Backup for the CPU Module Change Function264
- Restoration for the CPU Module Change Function273
- CPU Module Data Backup/Restoration Function277
- Backup Function283
- Restoration Function291
- Module Model Name Read298
- Module Error Collection299
- Local Device Batch Read Function303
- Send Points Extension Function (CC-Link IE Controller Network Module)305
- Write-Protect Function for Device Data (from Outside the CPU Module)307
- Setting Method308
- Target Devices309
- Operations and Functions that Cannot be Executed for Devices in Write-Protected Range310
- Precautions313
- Operation History Function315
- Operation History Save Function317
- Operation History Display327
- Operation History Clear Function327
- Precautions328
- List of Operation Codes329
- Iq Sensor Solution Function334
- Part 3 Devices, Constants335
Chapter 4 Devices336
- Device List336
- Internal User Devices345
- Input (X)348
- Output (Y)350
- Internal Relay (M)351
- Latch Relay (L)352
- Annunciator (F)353
- Edge Relay (V)357
- Link Relay (B)358
- Link Special Relay (SB)359
- Step Relay (S)360
- Timer (T)360
- Counter (C)369
- Data Register (D)373
- Link Register (W)374
- Link Special Register (SW)376
- Internal System Devices377
- Function Devices (FX, FY, FD)377
- Special Relay (SM)379
- Special Register (SD)379
- Link Direct Device380
- Module Access Devices384
- Intelligent Function Module Device384
- Cyclic Transmission Area Device386
- Index Register (Z)/Standard Device Resister (Z)387
- Index Register (Z)387
- Standard Device Register (Z)389
- Switching from the Scan Execution Type to the Interrupt/Fixed Scan Execution Type Program390
- File Register (R)392
- Storage Location393
- File Register Size393
- Differences in Available Accesses by Storage Memory395
- Registration Procedure for the File Register395
- Specification Methods of the File Register399
- Precautions for Using the File Register400
- Extended Data Register (D) and Extended Link Register (W)402
- Nesting (N)407
- Pointer (P)408
- Local Pointer409
- Common Pointer411
- Interrupt Pointer(I)412
- List of Interrupt Pointer Numbers and Interrupt Factors413
- Other Devices415
- SFC Block Device (BL)415
- Network No. Specification Device (J)415
- I/O No. Specification Device (U)416
- Macro Instruction Argument Device (VD)416
Chapter 5 Constants417
- Decimal Constant (K)417
- Hexadecimal Constant (H)417
- Real Number (E)418
- Character String (" ")419
Chapter 6 Convenient Usage of Devices420
- Global Device420
- Local Device422
- Appendices432
Appendix 1 Parameters432
Appendix 1.1 List of Parameter Numbers433
Appendix439
- PLC Name439
Appendix 1.2 PLC Parameters439
Appendix 1.2.2440
- PLC System440
Appendix 1.2.3442
- Plc Ras443
Appendix 1.2.3 PLC File442
Appendix 1.2.4443
- Boot File445
Appendix 1.2.5445
- Program446
Appendix 1.2.7447
- Device448
Appendix 1.2.7 SFC447
Appendix 1.2.8448
- I/O Assignment451
Appendix 1.2.10 Multiple CPU Setting453
Appendix 1.2.11455
- Serial Communication457
Appendix 1.2.11 Built-In Ethernet Port Setting455
Appendix 1.2.12457
- Acknowledge XY Assignment458
Appendix 1.3459
- CC-Link IE Controller Network Setting460
Appendix 1.3 Network Parameters459
Appendix 1.3.1460
- CC-Link IE Field Network Setting461
Appendix 1.3.2461
- MELSECNET/H Setting462
Appendix 1.3.4 Ethernet Setting463
Appendix 1.3.5464
- CC-Link Setting464
Appendix 1.4 Remote Password465
Appendix 2 Functions Added or Changed by Version Upgrade467
Appendix 3471
Appendix 3 CPU Module Processing Time471
Appendix472
- Factors that Increase the Scan Time483
Appendix 3.2 Time Required for each Processing Included in Scan Time472
Appendix494
- BIN (Binary Code)496
Appendix 4 Data Used in Sequence Programs494
Appendix 4.1496
- HEX (Hexadecimal)497
Appendix 4.3 BCD (Binary-Coded Decimal)497
Appendix 4.4 Real Number (Floating-Point Data)499
Appendix 4.5 Character String Data503
Appendix 5 Replacing Basic Model QCPU or Qn(H)CPU with Qnucpu504
Appendix 5.1 Replacement Precautions504
- Replacing High Performance Model QCPU with Universal Model QCPU508
Appendix 5.2 Applicable Devices and Software515
Appendix520
Appendix 5.3 Instructions520
Appendix 5.3.2 Replacing Programs Using Multiple CPU Transmission Dedicated Instructions522
Appendix523
- Program Replacement Examples523
Appendix 5.4537
- Floating-Point Operation Instructions537
Appendix 5.4 Functions537
Appendix 5.4.2544
- Range Check Processing for Index-Modified Devices548
Appendix 5.4.2 Error Check Processing for Floating-Point Data Comparison Instructions544
- (Excluding High-Speed Universal Model QCPU)544
Appendix 5.4.4 Device Latch Function552
Appendix 5.4.5 File Usability Setting554
Appendix 5.4.6557
- Parameter-Valid Drive and Boot File Setting557
Appendix 5.4.7 External Input/Output Forced On/Off Function560
Appendix 5.5564
- Special Relay List564
- Special Register List567
Appendix 5.5 Special Relay and Special Register564
Appendix 6 Precautions for Replacing Qnud(E)(H)CPU with Qnudvcpu/Qnudpvcpu569
Appendix 6.1 Precautions569
Appendix 7 Precautions for Replacing Qnphcpu with Qnudpvcpu573
Appendix 8 Precautions for Using GX Works2 and Differences with GX Developer573
Appendix 9 Ways to Use Different Types of the Backup/Restoration Function574
Appendix 10 Device Point Assignment Sheet575
- Index577
- Revisions581
- Warranty585

Mitsubishi Electric MELSEC-Q00U(J)CPU - Refresh Mode

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