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10 Modbus TCP Master Function

10-6

NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)

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Intended Audience3
Applicable Products3
Relevant Manuals4
Manual Structure6
Page Structure6
Special Information7
Precaution on Terminology7
Sections in this Manual9
Table of Contents10
Terms and Conditions Agreement17
Warranty, Limitations of Liability17
Application Considerations18
Disclaimers18
Safety Precautions20
Precautions for Safe Use21
Precautions for Correct Use22
Regulations and Standards23
Versions24
Checking Versions24
Unit Versions of CPU Units and Sysmac Studio Versions28
Unit Versions of CPU Units and Peripheral Tool Versions28
Related Manuals29
Revision History32
Introduction35
Ethernet/Ip Features36
Features of Built-In Ethernet/Ip Port on NJ/NX-Series CPU Units36
Introduction36
System Configuration and Configuration Devices39
Devices Required to Construct a Network39
Support Software Required to Construct a Network40
Built-In Ethernet/Ip Port42
Specifications42
Part Names and Functions46
Introduction to Communications Services53
CIP (Common Industrial Protocol) Communications Services53
IP Routing55
Packet Filter56
BOOTP Client57
FTP Server57
FTP Client58
Automatic Clock Adjustment58
Socket Service59
Specifying Host Names60
SNMP Agent60
TCP/UDP Message Service61
Ethernet/Ip Communications Procedures62
Selecting the Network Devices66
Recommended Network Devices66
Ethernet Switch Types67
Ethernet Switch Functions67
Precautions for Ethernet Switch Selection68
Network Installation71
Basic Installation Precautions71
Recommended Network Devices71
Precautions When Laying Twisted-Pair Cable71
Precautions When Installing and Connecting Ethernet Switches75
Connecting to the Network77
Ethernet Connectors77
Connecting the Cable77
System-Defined Variables Related to the Built-In Ethernet/Ip Port79
System-Defined Variables81
Specifications for Individual System-Defined Variables114
Determining IP Addresses141
IP Addresses142
IP Address Configuration142
Allocating IP Addresses142
Subnet Mask142
Cidr143
Built-In Ethernet/Ip Port IP Address Settings145
Determining IP Addresses145
Setting IP Addresses145
Online Connection148
Checking the Current IP Address151
Private and Global Addresses152
Using a Private Address for the Built-In Ethernet/Ip Port153
Using a Global Address for the Built-In Ethernet/Ip Port154
Sysmac Studio Settings for the Built-In Ethernet/Ip Port155
TCP/IP Settings Display156
LINK Settings Display162
FTP Settings Display163
NTP Settings Display164
SNMP Settings Display166
SNMP Trap Settings Display168
PING Command172
Using the PING Command172
Host Computer Operation172
Introduction to Tag Data Links176
Tag Data Links176
Data Link Data Areas177
Tag Data Link Functions and Specifications180
Overview of Operation181
Starting and Stopping Tag Data Links183
Controller Status184
Concurrency of Tag Data Link Data186
Controller Status186
Setting Tag Data Links193
Starting the Network Configurator193
Tag Data Link Setting Procedure195
Registering Devices195
Creating Tags and Tag Sets197
Connection Settings210
Creating Connections Using the Wizard220
Creating Connections by Dragging and Dropping Devices223
Connecting the Network Configurator to the Network226
Downloading Tag Data Link Parameters232
Uploading Tag Data Link Parameters235
Verifying Tag Data Link Parameters238
Starting and Stopping Tag Data Links242
Clearing the Device Parameters245
Saving the Network Configuration File247
Reading a Network Configuration File248
Checking Connections250
Changing Devices251
Displaying Device Status252
Ladder Programming for Tag Data Links254
Status Flags Related to Tag Data Links258
Tag Data Links with Other Models260
CIP Message Communications263
Overview of the CIP Message Communications Service265
Message Communications Service Specifications265
CIP Message Communications Client Function266
Overview266
CIP Communications Instructions266
Using CIP Communications Instructions267
Route Path268
Route Path269
Request Path (IOI)278
Service Data and Response Data282
Sample Programming for CIP Connectionless (UCMM) Message Communications284
Sample Programming for CIP Connection (Class 3) Message Communications289
Sample Programming for CIP Connection (Class 3) Message Com- Munications289
Operation Timing296
Response Codes297
CIP Communication Server Function301
CIP Message Structure for Accessing CIP Objects301
CIP Message Structure for Accessing Variables302
Specifying Request Path303
Examples of CIP Object Specifications303
Examples of Variable Specifications304
Logical Segment304
Data Segment304
Specifying Variable Names in Request Paths305
CIP Object Services309
CIP Objects Sent to the Built-In Ethernet/Ip Port309
Identity Object (Class ID: 01 Hex)309
NX Configuration Object (Class ID: 74 Hex)312
TCP/IP Interface Object (Class ID: F5 Hex)334
Ethernet Link Object (Class ID: F6 Hex)337
Controller Object (Class ID: C4 Hex)343
Read and Write Services for Variables345
Read Service for Variables345
Write Service for Variables346
Variable Data Types349
Data Type Codes349
Common Format349
Elementary Data Types350
Derived Data Types351
Socket Service355
Basic Knowledge on Socket Communications356
Sockets356
Port Numbers for Socket Services356
Basic Knowledge on Protocols357
Differences between TCP and UDP357
Fragmenting of Send Data358
Data Receive Processing360
Broadcasting363
Overview of Built-In Ethernet/Ip Port Socket Services364
Overview364
Procedure364
Settings Required for the Socket Services365
Socket Service Instructions366
Details on Using the Socket Services367
Using the Socket Services367
Procedure to Use Socket Services367
Timing Chart for Output Variables Used in Communications369
UDP Sample Programming370
TCP Sample Programming376
Precautions in Using Socket Services383
Precautions for UDP and TCP Socket Services383
Precautions for UDP Socket Services383
Precautions for TCP Socket Services383
TCP/UDP Message Service385
Outline of TCP/UDP Message Service385
Specifications of TCP/UDP Message Service385
Settings Required for TCP/UDP Message Service385
Command Format Specifications385
Modbus TCP Master Function389
Overview of Modbus TCP Master Function390
10-2 Modbus TCP Master Function Details391
Modbus TCP Instruction Type391
Modbus TCP Instruction Function391
Modbus TCP Master Function Procedure392
11-1 Overview and Specifications396
Overview396
Specifications396
11-2 FTP Server Function Details398
Supported Files398
Connecting to the FTP Server398
11-3 Using the FTP Server Function401
Procedure401
List of Settings Required for the FTP Server Function401
11-4 FTP Server Application Example403
11-5 Using FTP Commands405
Table of Commands405
Using the Commands405
11-6 Using SD Memory Card Operations412
SD Memory Card Types412
File Types413
Initializing SD Memory Cards414
Format of Variable Data414
Application Example from a Host Computer415
FTP Client418
12-1 Using the FTP Client to Transfer Files418
Transferring Files418
Connectable FTP Servers418
File Transfer Options419
Other Functions420
FTP Client Communications Instructions421
Functions of the FTP Client Communications Instructions421
Restrictions on the FTP Client Communications Instructions424
12-3 FTP Client Application Example425
Automatic Clock Adjustment431
Overview432
Specifications432
Procedure to Use the Automatic Clock Adjustment Function434
Procedure434
Settings Required for Automatic Clock Adjustment434
SNMP Agent435
Overview436
14-1 SNMP Agent436
Specifications437
SNMP Messages437
MIB Specifications438
14-2 Procedure to Use the SNMP Agent455
Procedures455
Settings Required for the SNMP Agent455
15-1 Communications System458
Tag Data Link Communications Method458
Calculating the Number of Connections460
Packet Interval (RPI) Accuracy461
15-2 Adjusting the Communications Load463
Checking Bandwidth Usage for Tag Data Links464
Tag Data Link Bandwidth Usage and RPI465
Adjusting Device Bandwidth Usage466
Changing the RPI467
RPI Setting Examples472
15-3 I/O Response Time in Tag Data Links478
Timing of Data Transmissions478
Built-In Ethernet/Ip Port Data Processing Time479
Relationship between Task Periods and Packet Intervals (Rpis)481
Maximum Tag Data Link I/O Response Time482
15-4 Message Service Transmission Delay485
Troubleshooting487
Overview of Troubleshooting488
Checking Status with the Network Configurator489
The Network Configurator's Device Monitor Function489
Connection Status Codes and Troubleshooting497
Appendices505
Functional Comparison of Ethernet/Ip Ports on NJ/NX-Series CPU Units and Other Series506
Use the Sysmac Studio to Set the Tag Data Links (Ethernet/Ip Connections507
A-2-1 Overview of the Tag Data Links (Ethernet/Ip Connections) Settings with the Sysmac Studio507
Overview of the Tag Data Links (Ethernet/Ip Connections) Settings with the Sysmac Studio507
A-2-2 Procedure to Make the Ethernet/Ip Connection Settings with the Sysmac Studio508
A-2-3 Ethernet/Ip Connection Settings509
A-2-4 Making the Ethernet/Ip Connection Settings with the Sysmac Studio513
A-2-5 Checking Communications Status with the Sysmac Studio and Troubleshooting534
A-2-5 Checking Communications Status with the Sysmac Studio and Trou- Bleshooting534
Troubleshooting534
A-2-6 Troubleshooting538
A-3 EDS File Management543
A-3-1 Installing EDS Files543
Installing EDS Files543
A-3-2 Creating EDS Files544
A-3-3 Deleting EDS Files544
Saving EDS Files545
Searching EDS Files545
A-3-6 Displaying EDS File Properties546
A-3-7 Creating EDS Index Files546
Precautions for Using the Network Configurator on Windows XP, Windows Vis- Ta, or Windows 7 or Higher547
Precautions for Using the Network Configurator on Windows XP, Windows Vista, or Windows 7 or Higher547
Changing Windows Firewall Settings547
A-5 Variable Memory Allocation Methods550
A-5-1 Variable Memory Allocation Rules550
A-5-2 Important Case Examples559
Precautions When Accessing External Outputs in CPU Units563
A-7 TCP State Transitions564
Example of NX Unit Setting Using NX Configuration Object Service566
A-8-1 Changing the Unit Operation Settings for Singe NX Unit566
A-8-2 Changing the Unit Operation Settings for Multiple NX Units567
A-8-3 Initializing the Unit Operation Settings for Singe NX Unit567
A-9 Version Information568

Omron NX102-12 Series

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