Mitsubishi Electric MELSEC iQ-R Series - CPU Buffer Memory Access Device; Specification Method

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27 DEVICES

27.7 CPU Buffer Memory Access Device

475

27.7 CPU Buffer Memory Access Device

This device accesses memory used by the built-in function of the CPU module, such as data writing/reading between CPU

modules on the multiple CPU system and Ethernet function ( Page 356 Specification method thorough CPU buffer

memory access device)

Specification method

Specify this device with 'Un\Gn'. (Example: U3E1\G4095, U3E2\HG1024)

Specified item Value to be specified

Un (I/O number of the CPU module) CPU No.1 3E0

CPU No.2 3E1

CPU No.3 3E2

CPU No.4 3E3

G (CPU buffer memory area) CPU buffer memory G

Fixed scan communication area HG

n (CPU buffer memory address) 0 to 268435455 (decimal)

Main Page

default chapter3
- Safety Precautions3
- Introduction13
- Table of Contents14
- Relevant Manuals26
- Terms27
- Generic Terms and Abbreviations28
- Part 1 Part Names29
Chapter 1 Cpu Module30
Chapter 2 Extended Sram Cassette33
Chapter 3 Redundant Function Module35
- Part 2 Procedures before Operation37
Chapter 4 Start-Up Procedure38
- Overview38
- Procedure for Process Mode38
- Installing a Battery40
- Installation Procedure40
- Inserting or Removing an Extended SRAM Cassette41
- Insertion Procedure41
- Removal Procedure41
- Inserting and Removing an SD Memory Card42
- Insertion Procedure42
- Removal Procedure42
- Creating a Project43
- Connecting a Personal Computer44
- Initializing the CPU Module45
- Setting Parameters45
- Programming48
- Registering Labels48
- Inserting Program Elements49
- Inserting Pous by Key Input51
- Converting the Program52
- Saving the Project52
- Writing Data to the Programmable Controller52
- Resetting the CPU Module53
- Executing the Program54
- Monitoring the Program55
Chapter 5 Procedure for Starting up a Redundant System56
- Overview56
- Starting up both Systems Simultaneously56
- Starting up the Systems One by One59
- Precautions When the Data Logging Function Is Used63
- Wiring64
- Redundant Function Modules64
- Redundant Extension Base Units65
- Power Supply Modules in a Redundant System65
- Creating a Project66
- Connecting a Personal Computer and the CPU Module66
- Setting the System (System a or System B)67
- Writing Data to the Programmable Controller69
- Monitoring the Program70
- Part 3 System Configuration71
Chapter 6 System Configuration72
- Part 4 Specifications75
Chapter 7 Performance Specifications76
- CPU Module76
- Hardware Specifications76
- Programming Specifications78
- Extended SRAM Cassette80
- Redundant Function Module80
- Part 5 Cpu Module Operation81
Chapter 8 Running a Program82
- Scan Configuration82
- Initial Processing (When Powered on or Switched to RUN)84
- I/O Refresh84
- Program Operation84
- END Processing85
- Scan Time86
- Initial Scan Time86
- Constant Scan87
- Device/Label Access Service Processing Setting89
- Device/Label Access Service Processing Constant Wait Function93
- Data Communication and I/O Processing96
- Data Communication96
- I/O Processing and Response Delay96
- Refresh Mode97
- Direct Mode100
- Program Flow102
- Program Execution Type103
- Initial Execution Type Program103
- Scan Execution Type Program104
- Fixed Scan Execution Type Program104
- Event Execution Type Program109
- Standby Type Program113
- Execution Type Change114
- Group Setting for Refresh115
- Subroutine Program116
- Interrupt Program117
- Interrupt Period Setting127
- Interrupt Enabled During Instruction Execution127
- Processing at Interrupt Program Startup128
- Multiple Interrupt Function131
- Precautions135
Chapter 9 Cpu Module Operation Processing137
- Operation Processing by Operating Status137
- Operation Processing When Operating Status Is Changed138
- Output Mode at Operating Status Change (STOP to RUN)139
- Operation Processing at Momentary Power Failure140
Chapter 10 Memory Configuration of the Cpu Module141
- Memory Configuration141
- Program Memory/Program Cache Memory142
- Device/Label Memory143
- Data Memory147
- Refresh Memory147
- CPU Buffer Memory147
- Signal Flow Memory148
- SD Memory Card149
- File Size Unit in Memory151
- Memory Operation152
- Initialization and Value Clear152
- Files153
- File Types and Storage Memory153
- File Operation Available155
- File Size156
Chapter 11 Basic Concept of Redundant System159
- Concept of "Systems" in a Redundant System159
- System Switching between Control System and Standby System160
- System Consistency Check160
- Operation Modes of the Process CPU160
- Operation Modes of a Redundant System161
- System Determination163
- When both Systems Are Started up163
- When Only One System Is Started up165
- When One System Is Started Automatically Even Though a Tracking Communication Error Has Occurred167
- When the Previous Control System Is Started up as the Control System171
- State Transition of a Redundant System177
- Access in a Redundant System with Redundant Extension Base Unit178
- Access to Modules on the Extension Base Unit180
- Part 6 Functions181
Chapter 12 Function List182
Chapter 13 Clock Function187
- Time Setting187
- Clock Data187
- Changing the Clock Data187
- Reading the Clock Data188
- Precautions on the Clock Data188
- Setting Time Zone189
- System Clock190
- Special Relay Used for System Clock190
- Special Register Used for System Clock190
Chapter 14 Writing Data to the Cpu Module191
- Writing Data to the Programmable Controller191
- Online Change191
- Online Change (Ladder Block)191
- File Batch Online Change195
- Precautions196
Chapter 15 Ras Functions202
- Scan Monitoring Function202
- Scan Time Monitoring Time Setting202
- Watchdog Timer Reset202
- Precautions203
- Self-Diagnostics Function204
- Self-Diagnostics Timing204
- Check Method of Error204
- CPU Module Operation Upon Error Detection Setting205
- Error Detection Invalidation Setting209
- Error Clear210
- Clearing Errors in the CPU Module of the Standby System from the CPU Module of the Control System212
- Event History Function213
- Event History Setting214
- Logging of the Event History215
- Viewing the Event History218
- Clearing the Event History218
- Precautions219
- Program Cache Memory Auto Recovery Function220
Chapter 16 Remote Operation221
- Remote RUN/STOP221
- Executing Method221
- Precautions222
- Remote PAUSE223
- Executing Method223
- Setting RUN-PAUSE Contacts224
- Remote RESET225
- Enabling Remote RESET225
- Executing Method226
- Precautions for Redundant System226
Chapter 17 Boot Operation227
- Boot Operation Procedure227
- Specifiable File Types228
- Allowed Maximum Number of Boot Files228
- Configuring the Boot Setting229
- Writing Boot Settings and Boot Files230
- Operation When Security Functions Are Enabled230
- When a Security Key Is Set230
- When a File Password Is Set230
- Precautions231
Chapter 18 Monitor Function232
Chapter 19 Test Function234
- External Input/Output Forced On/Off Function234
- Device Test with Execution Conditions243
Chapter 20 Data Logging Function257
- Data Logging Procedure258
- Specifications259
- Data to be Collected260
- Number of Data Points260
- Data Type260
- Data Collection Conditions261
- Each Scan261
- Time Specification261
- Interrupt Occurrence262
- Condition Specification263
- Logging Type266
- Operating Procedure for Continuous Logging266
- Operating Procedure for Trigger Logging267
- Data Logging File271
- Storage Format of Data Logging Files271
- Storage Location of Data Logging Files280
- States of the Data Logging Function281
- Data Logging States281
- LED Status283
- Steps until the Collected Data Is Saved284
- Internal Buffer285
- Switching to a Storage File286
- Missing Data290
- Conditions under Which Missing Data Occurs290
- Setting Behavior at the Time of Transition to RUN291
- Auto Logging292
- SD Memory Card Replacement296
- SD Memory Card Life When the Data Logging Function Is Used298
- Errors Generated During Data Logging299
- Special Relay and Special Register Used by the Data Logging Function299
- Precautions to Take When Using the Data Logging Function300
Chapter 21 Pid Control/Process Control Function307
- PID Control Function307
- Process Control Function308
- Process Control by Using Process Control Function Blocks308
- Process Control by Using Process Control Instructions309
Chapter 22 Cpu Module Data Backup/Restoration Function310
- Backup Function316
- Backup Processing Triggered by Turning on SM1351318
- Automatic Backup Using SD944319
- Settings for Automatic Restoration with the SD CARD off Button321
- Checking Backup Errors321
- Precautions322
- Restoration Function326
- Automatic Restoration Using SD955328
- Automatic Restoration with the SD CARD off Button330
- Checking Restoration Errors332
- Precautions332
Chapter 23 Multiple Cpu System Function336
- Out-Of-Group I/O Fetch337
- Accessing Controlled Module337
- Accessing Non-Controlled Module337
- Operation Settings340
- Stop Setting340
- Synchronous Startup Setting341
- Clock Data344
- Multiple CPU Parameter Checking345
- Data Communication between CPU Modules346
- Memory to be Used346
- Fixed Scan Communication Setting351
- Error Detection Setting351
- Module-By-Module Data Guarantee352
- Communication through Refresh354
- Communication through Direct Access358
- Data Assurance by Program361
- Communication between CPU Modules in Error State364
- Multiple CPU Synchronous Interrupt365
- Execution Timing366
- Multiple Interrupt366
- Precautions366
Chapter 24 Security Function367
Chapter 25 Routing Setting369
- Setting Method369
- Setting Example370
- Precautions371
Chapter 26 Redundant Function372
- Operation Mode Change373
- Procedures373
- Precautions375
- System Switching376
- System Switching Method376
- Operation at System Switching382
- Execution Availability of System Switching383
- Check Method of System Switching Information385
- Precautions387
- Tracking Transfer390
- Tracking Data391
- Tracking Block and Tracking Trigger395
- Setting Procedure for Tracking Transfer396
- Tracking Transfer Setting397
- Tracking Mode402
- Precautions405
- Memory Copy from Control System to Standby System407
- Auto Memory Copy409
- Memory Copy Using the Engineering Tool410
- Memory Copy Using the Special Relay and Special Register411
- Precautions413
- System Consistency Check415
- Files417
- Operating Status418
- Modules on the Main Base Unit418
- Checking the System Configuration in a Redundant System with Redundant Extension Base Unit419
- SD Memory Card419
- Program Execution in both Systems420
- Operation of a Program Executed in both Systems422
- Precautions424
- Redundant System Operation Setting427
- Standby System Output Setting428
- Setting to Wait Cyclic Data Receive after System Switching429
- Redundant Function Module Communication Test430
- Execution Procedure of the Module Communication Test430
- Settings for Redundant System with Redundant Extension Base Unit431
- Automatic Recovery of the CPU Module of the Standby System432
- SLMP Communication434
- Precautions on Programming435
- Instructions Not Available in Redundant System435
- Interrupt from Modules442
- Precautions for Using the Annunciator (F)443
- Precautions on Timers and Timer Function Blocks444
- Precautions on Access to Intelligent Function Module or External Devices445
- Precautions on Writing Data from GOT or External Devices447
- Precautions on Outputting in the Middle of the Scan447
- Precautions for the Redundant Extension Base Unit Configuration448
- Part 7 Devices, Labels, and Constants449
Chapter 27 Devices450
- Device List450
- Device Setting452
- Range of Use of Device Points453
- User Device454
- Input (X)454
- Output (Y)454
- Internal Relay (M)455
- Latch Relay (L)455
- Link Relay (B)455
- Annunciator (F)455
- Link Special Relay (SB)457
- Edge Relay (V)458
- Step Relay (S)458
- Timer459
- Counter467
- Data Register (D)470
- Link Register (W)470
- Link Special Register (SW)470
- System Device471
- Function Device (FX/FY/FD)471
- Special Relay (SM)472
- Special Register (SD)472
- Link Direct Device473
- Specification Method473
- Specification Range474
- Difference from Link Refresh475
- Module Access Device476
- Precautions476
- CPU Buffer Memory Access Device477
- Specification Method477
- Index Register (Z/LZ)478
- 16-Bit Index Modification478
- Device for Which Index Modification Can be Performed479
- Index Register Setting479
- Combination of Index Modification480
- Precautions480
- File Register (R/ZR)482
- Specification Method482
- Setting File Registers483
- Clearing File Registers483
- Refresh Data Register (RD)484
- Refresh Memory Setting484
- Nesting (N)485
- Pointer (P)486
- Global Pointer486
- Local Pointer487
- Pointer Setting488
- Interrupt Pointer (I)489
- Interrupt Factors of the Interrupt Pointer Numbers489
- The Priority for the Interrupt Pointer Numbers and Interrupt Factors490
- Network No. Specification Device (J)491
- I/O No. Specification Device (U)491
- SFC Block Device (BL)491
- SFC Transition Device (TR)491
- Global Device491
- Local Device492
- Indirect Specification496
Chapter 28 Labels497
- Global Labels497
- Local Labels498
- Classes498
- Data Types499
- Arrays502
- Structures506
- Label Access Setting from External Device508
- Configuration Procedure510
- Label Communication Data Storage Location and Operation at the Time of each Setting Operation510
- File Operation510
- Precautions511
Chapter 29 Latch Function513
- Latch with Battery513
- Types of Latch513
- Applicable Devices and Labels514
- Setting Latch on Devices515
- Setting Latch on Labels519
- Clearing Latch Range Data519
- Precautions519
Chapter 30 Device/Label Initial Value Settings520
- Setting Initial Device/Label Values521
- Setting Initial Device Values521
- Setting Initial Label Values522
- Applicable Devices/Labels523
- Precautions523
Chapter 31 Label Initialization Function524
- Initialization of Labels after Rebuilt All (Reassignment)524
- Label Initial Value Reflection Setting526
Chapter 32 Constants528
- Decimal Constant (K)528
- Hexadecimal Constant (H)528
- Real Constant (E)529
- Setting Range for Real Numbers529
- Processing When Operation Is in Progress529
- Character String Constant529
- Notation of Constants530
- Part 8 Troubleshooting533
Chapter 33 Troubleshooting Procedure534
- Troubleshooting with LED Indicators535
- LED Status of the CPU Module535
- Troubleshooting Using the Engineering Tool536
- System Monitor536
- Module Diagnostics536
- Event History537
Chapter 34 Troubleshooting by Symptom538
- When the POWER LED of the Power Supply Module Turns off538
- When the READY LED of the CPU Module Turns off538
- When an Error Has Occurred in a Redundant Function Module539
- When the RUN LED Turns off539
- When the ERR LED Turns on or Flashes539
- When the L ERR LED Turns on539
- When the Specific Extension Base Unit Cannot be Recognized540
- When the Specific Q Series Extension Base Unit Cannot be Recognized540
- When an Error Has Occurred in an Extension Base Unit for a Redundant System540
- When Data Cannot be Written to the Programmable Controller540
- When Data Cannot be Read from the Programmable Controller540
- When the Operating Status of the CPU Module Cannot be Changed541
- When the Ethernet Function Cannot be Used541
- When Cyclic Data Is Turned off at the Time of System Switching541
Chapter 35 Maintenance and Inspection of a Redundant System542
- Module Replacement in a Redundant System542
- Replacing the CPU Module544
- Replacing the Power Supply Module546
- Replacing the Redundant Power Supply Module546
- Replacing the Redundant Function Module547
- Replacing the I/O Module547
- Replacing the Intelligent Function Module548
- Replacing the Main Base Unit548
- Replacing the Extension Cable between the Main Base Unit and Extension Base Unit549
- Replacing the Extension Cable between Extension Base Units549
- Replacement/Addition of Extension Cables (Online)550
Chapter 36 Error Codes552
- Error Code System552
- Operation When an Error Occurs554
- How to Clear Errors554
- List of Error Codes554
- Codes of Errors Detected by the Self-Diagnostic Function (1000H to 3FFFH)554
- Codes of Errors Detected by Other than the Self-Diagnostic Function (4000H to 4FFFH)605
- Codes of Errors Detected by Other than the Self-Diagnostic Function (6F00H to 6FFFH)630
- Codes of Errors Detected by Other than the Self-Diagnostic Function (C000H to CFFFH)631
Chapter 37 Event List632
- How to Read the Event List632
- Event List635
- Appendices641
Appendix 1 External Dimensions641
Appendix 2 Compliance with EMC and Low Voltage Directives644
Appendix 3 Functional Availability by CPU Module Model645
Appendix 4 List of Special Relay Areas647
- Diagnostic Information648
- System Information651
- SFC Information653
- System Clock654
- Fixed Scan Function Information656
- Drive Information657
- Instruction Related658
- Latch Area660
- Data Logging Function661
- CPU Module Data Backup/Restoration Function663
- File Transfer Function (FTP Client)663
- Event History Function663
- Ethernet Function664
- Online Module Change Function665
- Redundant Function667
Appendix 5 List of Special Register Areas670
- Diagnostic Information671
- System Information682
- SFC Information686
- System Clock686
- Fixed Scan Function Information686
- Drive Information689
- Instruction Related691
- Firmware Update Function693
- Latch Area695
- Data Logging Function697
- CPU Module Data Backup/Restoration Function698
- Interrupt Pointer Mask Pattern698
- Event History Function699
- Debug Function699
- Ethernet Function700
- Online Module Change Function702
- System Information703
- Redundant Function703
Appendix 6 Buffer Memory709
Appendix 7 Processing Time710
- Instruction Execution Time710
- Program Execution Time710
- END Processing Time712
- Data Logging Function Processing Time722
- Process Control Function Processing Time723
- SFC Program Processing Time724
- SFC Program Switching725
- Redundant Function Processing Time726
Appendix 8 Parameter List734
- System Parameters734
- CPU Parameters735
- Module Parameters736
- Memory Card Parameters736
Appendix 9 Target List and Operation Details of the Device/Label Access Service Processing Setting737
- Target List737
- Operation Details739
Appendix 10Program Restoration Information Write Selection743
- Checking the Program Restoration Information Write Status743
- Precautions745
- Extension Base Unit746
Appendix 12Program for System Switching at Built-In Ethernet Communication Error747
Appendix 13Added and Enhanced Functions749
- Index751
- Revisions755
- Conditions of Use for the Product756
- Warranty757
- Trademarks758

Mitsubishi Electric MELSEC iQ-R Series - CPU Buffer Memory Access Device; Specification Method

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