Mitsubishi Electric MELSEC iQ-R Series - Special Relay (SM); Special Register (SD)

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27 DEVICES

27.4 System Device

Special relay (SM)

This is the internal relay for which the specification is defined in the CPU module, where the status of the CPU module is

stored. ( Page 645 List of Special Relay Areas)

Special register (SD)

This is the internal register for which the specification is defined in the CPU module, where the status (diagnostics information,

system information, etc) of the CPU module is stored. ( Page 668 List of Special Register Areas)

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 - Special Relay (SM); Special Register (SD)

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