Mitsubishi Electric MELSEC iQ-R Series - Melsec Communication Protocol

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PART 1

PART 1 MELSEC

COMMUNICATION

PROTOCOL

MELSEC communication protocol (hereinafter abbreviated as MC protocol) is a communication protocol for

MELSEC programmable controller used when accessing programmable controller from an external device via

C24 or E71. This part explains the overview and basic operations of MC protocol.

1 ABILITY OF MC PROTOCOL

2 SUPPORTED DEVICES AND ACCESSIBLE RANGES

3 COMMUNICATION PROCEDURE

Main Page

Default Chapter3
- Safety Precautions3
- Conditions of Use for the Product5
- Introduction6
- Table of Contents7
- Relevant Manuals15
- Terms16
- Discontinued Models17
Melsec Communication Protocol19
Chapter 1 Ability of MC Protocol20
Purposes20
Features21
Chapter 2 Supported Devices and Accessible Ranges22
Supported Devices22
Accessible Range and Accessible Modules22
Chapter 3 Communication Procedure24
Features of Communication Process24
Considerations25
- Considerations When Connecting C2427
- Considerations When Connecting E7128
Part 2 Message Formats29
Chapter 4 Messages of Serial Communication Module30
Types and Purposes of Messages30
- Formats and Codes30
- Frame30
Message Formats of each Protocol31
- Format 131
- Format 232
- Format 333
- Format 434
- Format 535
Details of Setting Data36
- Control Code36
- Number of Data Bytes37
- Block Number38
- Frame ID no38
- Sum Check Code38
- End Code40
- Error Code40
Chapter 5 Messages of Ethernet Interface Module41
Types and Purposes of Messages41
- Code41
- Frame42
Message Format43
Details of Setting Data44
- Header44
- Subheader44
- Request Data Length and Response Data Length45
- Monitoring Timer45
- End Code46
- Error Information46
Chapter 6 Access Route Settings47
Accessible Ranges and Setting Data for each Frame47
- Frame47
- Frame48
- 1C Frame49
- 4E Frame, 3E Frame50
- 1E Frame51
Details of Setting Data52
- Station no52
- Network No., PC no54
- Request Destination Module I/O No., Request Destination Module Station no57
- Self-Station no61
Part 3 Command63
Chapter 7 Commands and Functions64
Command List64
- Commands for 4C/3C/4E/3E Frame65
- Commands for 2C Frame68
- Commands for 1C/1E Frame68
Chapter 8 Device Access69
Data to be Specified in Commands69
- Devices69
- Device Code List72
- Number of Device Points74
- Access Points74
- Number of Blocks75
- Read Data, Write Data76
- Set/Reset82
- Monitor Condition Specification83
Batch Read and Write90
- Batch Read in Word Units (Command: 0401)90
- Batch Read in Bit Units (Command: 0401)94
- Batch Write in Word Units (Command: 1401)96
- Batch Write in Bit Units (Command: 1401)99
Random Read and Write101
- Random Write in Word Units (Test) (Command: 1402)108
- Random Write in Bit Units (Test) (Command: 1402)112
Batch Read and Write Multiple Blocks114
- Batch Read Multiple Blocks (Command: 0406)114
- Batch Write Multiple Blocks (Command: 1406)118
Device Memory Monitor122
- Monitoring Procedure122
- Register Monitor Data (Command: 0801)123
- Monitor (Command: 0802)124
Chapter 9 Label Access127
Data to be Specified in Commands127
- Labels127
- Abbreviation Specification of Label131
- Points133
- Data Type ID134
- Data Length, Unit Specification135
- Read Data, Write Data137
Batch Read and Write138
- Batch Read Array Type Labels (Command: 041A)138
- Batch Write Array Type Labels (Command: 141A)145
Random Read and Write149
- Random Read Labels (Command: 041C)149
- Random Write Labels (Command: 141B)152
Chapter 10 Buffer Memory Access155
Buffer Memory155
- Data to be Specified in Commands155
- Batch Read (Command: 0613)157
- Batch Write (Command: 1613)159
Intelligent Function Module161
- Accessible Modules161
- Data to be Specified in Commands162
- Batch Read (Command: 0601)165
- Batch Write (Command: 1601)167
Chapter 11 Control Module Operation169
Data to be Specified in Commands169
- Mode169
- Clear Mode169
- Model Name and Model Code170
- Remote Password172
- Loopback Data173
- Communication Error Information174
Remote Operation175
- Remote RUN (Command: 1001)175
- Remote STOP (Command: 1002)177
- Remote PAUSE (Command: 1003)178
- Remote Latch Clear (Command: 1005)179
- Remote RESET (Command: 1006)180
- Read CPU Model Name (Command: 0101)181
Remote Password182
- Execution Procedure182
- Unlock (Command: 1630)183
- Lock (Command: 1631)185
Loopback Test187
- Loopback Test (Command: 0619)187
Clear Error Information189
- Turn Indicator LED OFF, Initialize Error Code (Command: 1617)189
- Turn COM.ERR. LED off (Command: 1617)191
Chapter 12 File Control192
Execution Procedure192
- Procedure to Read Information from All Files in Directory (Folder)192
- Procedure to Read Files193
- Procedure to Overwrite Files193
- Procedure to Create New File and Write Data194
- Procedure to Delete Files195
- Procedure to Copy Files195
- Procedure to Modify File Creation Date and Time195
Considerations196
Data to be Specified in Commands197
- Password197
- Drive no200
- File no201
- Number of Files202
- Number of Characters202
- Directory Specification202
- File Name Specification204
- Attribute207
- Creation Date and Time (Last Edit Date and Time)208
- File Size209
- File Pointer no210
- Offset Address210
- Number of Bytes211
- Read Data, Write Data211
- Open Mode212
- Close Type212
File Check213
- Read Directory/File Information (Command: 1810)213
- Search Directory/File Information (Command: 1811)219
File Creation and Deletion222
- Create New File (Command: 1820)222
- Delete File (Command: 1822)225
- Copy File (Command: 1824)228
File Modification232
- Modify File Attribute (Command: 1825)232
- Modify File Creation Date and Time (Command: 1826)235
- Open File (Command: 1827)238
- Read File (Command: 1828)242
- Write to File (Command: 1829)244
- Close File (Command: 182A)246
Chapter 13 Serial Communication Module Dedicated Commands248
User Frame248
- Data to be Specified in Command249
- Read Registered Data (Command: 0610)251
- Register Data (Command: 1610)253
- Delete Registered Data (Command: 1610)255
Global Function257
- Global Signal ON/OFF (Command: 1618)258
Transmission Sequence Initialization Function260
- Initialize Transmission Sequence (Command: 1615)260
Mode Switching Function261
- Data to be Specified in Command261
- Switch Mode (Command: 1612)265
Programmable Controller CPU Monitoring Function268
- Data to be Specified in Command268
- Register (Command: 0630)271
- Deregister (Command: 0631)281
On-Demand Function282
- Settings for Using the On-Demand Function282
- Execution Procedure283
- Execution Timing284
- On-Demand (Command: 2101)285
PART 4 COMPATIBILITY with Qna SERIES287
CHAPTER 14 MELSEC-Qna SERIES SUPPORTED SPECIFICATIONS288
Frames and Commands that Can be Used288
Accessible Modules288
Considerations289
CHAPTER 15 Qnacpu DEDICATED COMMANDS290
Qnacpu Dedicated Commands List290
Defragmentation of Drive Memory291
- Data to be Specified in Commands292
- Read Drive Memory Usage Status (Command: 0205)295
- Defragment Drive Memory (Command: 1207)297
File Control299
- Considerations for File Control299
- Data to be Specified in Commands300
- File Control Execution Procedure for the Qnacpu308
- Read File Information Table Without Header Statement (Command: 0201)310
- Read File Information Table with Header Statement (Command: 0202)313
- Read File Presence (Search File) (Command: 0203)316
- Read File No. Usage Status (Command: 0204)318
- Read File (Command: 0206)320
- Register and Deregister File Locks (Command: 0808)323
- Create New File (Register File Name) (Command: 1202)325
- Write to File (Command: 1203)327
- Modify File Information (Command: 1204)331
- Delete File (Command: 1205)337
- Copy File (Command: 1206)339
Part 5 Compatibility with Aseries343
Chapter 16 Melsec-A Series Supported Specifications344
Frames and Commands that Can be Used344
Accessible Modules344
Considerations345
Chapter 17 Communicating Using 1C Frames346
Message Format346
Details of Setting Data348
- Command348
- Message Wait349
- Character Area349
- Error Code350
Command and Function Lists for 1C Frame351
Device Memory Read and Write352
- Considerations352
- Data to be Specified in Command353
- Batch Read (Bit Units) (Command: BR, JR)356
- Batch Read (Word Units) (Command: WR, QR)358
- Batch Write (Bit Units) (Command: BW, JW)360
- Batch Write (Word Units) (Command: WW, QW)362
- Test (Random Write) (Bit Units) (Command: BT, JT)364
- Test (Random Write) (Word Units) (Command: WT, QT)366
- Monitor (Command: BM, JM, WM, QM, MB, MJ, MN, MQ)368
Read and Write Extended File Register373
- Considerations for Reading and Writing Extended File Register373
- Specification Method for Extended File Register374
- Data to be Specified in Command376
- Batch Read (Command: ER)377
- Batch Write (Command: EW)378
- Test (Random Write) (Command: ET)379
- Monitor (Command: EM, ME)380
- Direct Read (Command: NR)383
- Direct Write (Command: NW)384
Read and Write Buffer Memory of Special Function Module385
- Data to be Specified in Command385
- Accessible Modules387
- Batch Read (Command: TR)388
- Batch Write (Command: TW)390
Loopback Test391
- Loopback Test (Command: TT)391
Details of Setting Data393
- Header394
- Subheader394
- PC no395
- ACPU Monitoring Timer396
- End Code, Abnormal Code397
Chapter 18 Communicating Using 1E Frames393
Message Format393
Commands and Function List for 1E Frame398
Read and Write Device Memory399
- Considerations399
- Data to be Specified in Command399
- Batch Read in Bit Units (Command: 00)405
- Batch Read in Word Units (Command: 01)407
- Batch Write in Bit Units (Command: 02)409
- Batch Write in Word Units (Command: 03)411
- Test in Bit Units (Random Write) (Command: 04)412
- Test in Word Units (Random Write) (Command: 05)414
- Monitor Device Memory (Command: 06, 07, 08, 09)416
Read and Write Extended File Register420
- Data to be Specified in Command420
- Batch Read (Command: 17)421
- Batch Write (Command: 18)423
- Test (Random Write) (Command: 19)425
- Monitor Extended File Registers (Command: 1A, 1B)427
- Direct Read (Command: 3B)430
- Direct Write (Command: 3C)432
Read and Write Buffer Memory of Special Function Module434
- Data to be Specified in Command434
- Accessible Modules435
- Batch Read (Command: 0E)436
- Batch Write (Command: 0F)438
Appendix440
Appendix 1 Read/Write by Device Extension Specification440
- Accessing Link Direct Devices442
- Accessing Module Access Devices444
- Accessing CPU Buffer Memory Access Device446
- Access for Index Modification448
- Accessing Devices for Indirect Specification453
Appendix 2 Processing Time456
- Time Chart and Communication Time of C24 Transmission Sequence456
- Transmission Time When Accessing Other Stations458
- Number of Scans Required for Processing461
Appendix 3 Compatibility with Multiple CPU Systems463
- When RCPU Is Configured in the Multiple CPU System463
- When QCPU Is Configured in the Multiple CPU System464
Appendix 4 Applicable Commands for Online Program Change465
- Commands that Cannot be Executed During RUN465
- Commands that Enable/Disable Online Change465
- Setting Method for Writing Data to CPU During RUN466
Appendix 5 Number of Processing Per One Communication467
- Commands for 4C/3C/4E/3E Frame467
- Commands for 2C Frame471
- Commands for 1C Frame471
- Commands for 1E Frame472
Appendix 6 Accessible Modules for each Command473
- Commands for 4C/3C/4E/3E Frame473
- Commands for 2C Frame476
- Commands for 1C Frame477
- Commands for 1E Frame478
Appendix 7 Setting Examples479
- Setting Examples of Message for Serial Communication Module479
- Setting Examples of Message for Ethernet Interface Module483
- Setting Examples of Access Route487
Index492
- Revisions494
- Warranty495
- Trademarks496

Mitsubishi Electric MELSEC iQ-R Series - Melsec Communication Protocol

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