Omron CJ1W-DRM21 Operation Manual page 16

CONTENTS
Section 5 Remote I/O Slave Communications
5-1 Slave Remote I/O Communications ....................................................................................... 5-2
5-1-1 Allocation Methods...................................................................................................................... 5-2
5-1-2 Remote I/O and Slave Communications Specifications .............................................................. 5-3
5-1-3 Procedures for Using Remote I/O Slave Communications ......................................................... 5-4
5-2 Fixed Allocations ..................................................................................................................... 5-7
5-2-1 Allocated Words .......................................................................................................................... 5-7
5-3 User-set Allocations ................................................................................................................ 5-9
5-3-1 Setting through CX-Integrator ..................................................................................................... 5-9
5-3-2 Settings through Device Variables for CJ-series Unit
(Slave User-set Allocations Setup Table) .................................................................................. 5-12
Section 6 Message Communications
6-1 Overview................................................................................................................................... 6-2
6-1-1 Outline of Message Communications ......................................................................................... 6-2
6-1-2 Explicit Message Communications ............................................................................................. 6-3
6-1-3 Message Communications Specifications................................................................................... 6-4
6-1-4 Message Communications Error Indications............................................................................... 6-5
6-1-5 Message Monitoring Timer ......................................................................................................... 6-5
6-1-6 Message Communications Errors ............................................................................................... 6-5
6-2 Sending Explicit Messages .................................................................................................... 6-7
6-2-1 Sending Explicit Messages ......................................................................................................... 6-8
6-2-2 Sending Explicit Messages Using SendCmd Instruction .......................................................... 6-11
6-3 Receiving Explicit Messages................................................................................................ 6-16
6-3-1 List of PLC Object Services ...................................................................................................... 6-17
Section 7 Other Functions
7-1 SD Memory Card Backup Functions...................................................................................... 7-2
7-1-1 Outline of Functions .................................................................................................................... 7-3
7-1-2 File Names .................................................................................................................................. 7-4
Section 8 Communications Timing
8-1 Remote I/O Communications Characteristics....................................................................... 8-2
8-1-1 Communications Cycle Time ...................................................................................................... 8-2
8-1-2 Calculating Guidelines for I/O Response Times ......................................................................... 8-5
8-1-3 More than One Master in Network .............................................................................................. 8-7
8-1-4 System Startup Time .................................................................................................................. 8-8
8-2 Message Communications ................................................................................................... 8-10
8-2-1 Message Communications Time............................................................................................... 8-10
8-2-2 Calculating the Maximum Message Response Time ................................................................ 8-11
Section 9 Troubleshooting and Maintenance
9-1 Troubleshooting with the DeviceNet Unit Indicators............................................................ 9-2
9-1-1 Determining Operating Status from the Indicators ...................................................................... 9-2
9-1-2 Troubleshooting Errors Occurring in the DeviceNet Unit............................................................. 9-4
9-2 Error Log Functions .............................................................................................................. 9-28
9-2-1 Error Log Table.......................................................................................................................... 9-28
9-2-2 Error Codes and Detail Codes .................................................................................................. 9-29
14 CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)