Omron CJ1W-DRM21 - Page 128

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3 Data Exchange with the CPU Unit

3-52

CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)

Additional Information

The Unit calculates the optimum communications cycle time and stores it internally. If a value

smaller than that is set, then the value calculated by the Unit will be used.

Main Page

Introduction3
Relevant Manuals4
Manual Configuration5
- Nomenclature and Installation6
Manual Structure10
Sections in this Manual13
- Table of Contents14
Contents15
Read and Understand this Manual18
Safety Precautions21
Precautions for Safe Use26
Precautions for Correct Use32
Regulations and Standards35
Unit Versions38
Related Manuals40
Revision History41
- Features and System Configuration43
Devicenet Unit Features44
Specifications49
- Devicenet Unit49
Overview of CX-Integrator55
Basic Operating Procedures56
- Network Installation Procedure56
- Devicenet Unit Startup Procedure57
- Message Communications Only (Neither Master nor Slave Function Used)63
- Message Communications Only63
List of Usage Methods by Purpose64
- Nomenclature and Installation67
Nomenclature and Functions68
- Switch Settings71
Installing the Devicenet Unit75
- System Configuration Precautions75
- Mounting75
- Handling Precautions76
- External Dimensions76
- Data Exchange with the CPU Unit 577
3-1 Data Exchange with the CPU Unit78
- Data Flow78
- Data Exchange with the CPU Unit78
- Accessing from the User Program80
Device Variables for CJ-Series Unit (Software Switches, Statuses)85
- Software Switches 185
- Software Switches 2 (N + 1CH)94
- Master COS Send Switches99
- Disconnect/Connect Switches100
- Unit Status 1101
- Unit Status 2106
- Master Status 1109
- Master Status 2114
- Slave Status 1115
- Slave Status 2121
- 3-2-11 Registered Slave Table122
- 3-2-12 Normal Slave Table123
- C200H Master Replacement Master Status 1124
Device Variables for CJ-Series Unit (Allocations Setting Table, Slave Detailed Status)127
- Communications Cycle Time Setting127
- Master User-Set Allocations Setup Table129
- Slave User-Set Allocations Setup Table132
- Communications Cycle Time Reference Table134
- Master User-Set Allocations Reference Table134
- Slave User-Set Allocations Reference Table136
- Slave Detailed Status137
- Remote I/O Master Communications141
Master Remote I/O Communications142
- Allocations142
- Remote I/O Master Specifications145
- Precautions on the Number of Master Units146
- Procedure for Using Remote I/O Master148
Scan List151
- Scan List Enabled and Scan List Disabled152
- Backing up the Scan List153
Fixed Allocations154
- Allocated Words154
- Allocation Procedures155
- Changing System Components158
- Fixed Allocations Example159
User-Set Allocations160
- Settings through CX-Integrator162
- Settings through Device Variables for CJ-Series Unit (Master User-Set Allocations Setup Table)165
Starting and Stopping Remote I/O Communications171
- Starting Remote I/O Communications171
- Stopping Remote I/O Communications171
- Restarting Remote I/O Communications171
Example of User Program for Remote I/O Communications172
Errors that May Occur in Remote I/O Communications173
- Remote I/O Slave Communications 7175
- Remote I/O Slave Communications176
Slave Remote I/O Communications176
- Allocation Methods176
- Remote I/O and Slave Communications Specifications177
- Procedures for Using Remote I/O Slave Communications178
Fixed Allocations181
- Allocated Words181
User-Set Allocations183
- Setting through CX-Integrator183
- Settings through Device Variables for CJ-Series Unit (Slave User-Set Allocations Setup Table)186
Overview190
- Outline of Message Communications190
- Explicit Message Communications191
- Message Communications Specifications192
- Message Communications Error Indications193
- Message Monitoring Timer193
- Message Communications Errors193
Sending Explicit Messages195
- Sending Explicit Messages Using Sendcmd Instruction199
Receiving Explicit Messages204
- List of PLC Object Services205
  - Other Functions215
SD Memory Card Backup Functions216
- Outline of Functions217
- File Names218
  - Communications Timing219
Remote I/O Communications Characteristics220
- Communications Cycle Time220
- Calculating Guidelines for I/O Response Times223
- More than One Master in Network225
- System Startup Time226
Message Communications228
- Message Communications Time228
- Calculating the Maximum Message Response Time229
  - Troubleshooting and Maintenance231
Troubleshooting with the Devicenet Unit Indicators232
- Determining Operating Status from the Indicators232
- Troubleshooting Errors Occurring in the Devicenet Unit234
Error Log Functions258
- Error Log Table258
- Error Codes and Detail Codes259
- Troubleshooting262
- Event Logs265
- Maintenance and Replacement290
Appendices293
- Differences in Available Functions Depending on the CPU Unit (NJ or CJ Series294
- Devicenet Connections327
- Devicenet Explicit Message Send Command for Other Manufacturer Nodes333
- Multi-Vendor Applications335
Index345

Omron CJ1W-DRM21 - Page 128

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