Omron CJ Series Operation Manual page 14

CONTENTS
Section 5 Remote I/O Communications
5-1 Exchanging Data with the CPU Unit ...................................................................................... 5-2
5-1-1 Exchanging Data between the CPU Unit and the CompoNet Master Unit.................................. 5-2
5-1-2 Access Methods from User Program .......................................................................................... 5-5
5-1-3 I/O Ports for the CompoNet Master Unit ..................................................................................... 5-7
5-2 Network Status....................................................................................................................... 5-13
5-2-1 Conditions for Starting and Stopping Remote I/O Communications ......................................... 5-13
5-2-2 Communications Errors............................................................................................................. 5-13
5-2-3 Confirming Normal Slave Unit Operation .................................................................................. 5-14
5-3 Device Variables for the CJ-series Unit ............................................................................... 5-20
5-3-1 Assigning Device Variables for the CJ-series Unit .................................................................... 5-20
5-3-2 I/O Data..................................................................................................................................... 5-21
5-3-3 Connect Flags and Communication Error Flags ....................................................................... 5-22
5-3-4 Status Information: Status (All Communications Modes).......................................................... 5-30
5-3-5 Status Information: Setting (All Communications Modes)......................................................... 5-33
5-4 Slave Unit Allocations ........................................................................................................... 5-34
5-4-1 Overview ................................................................................................................................... 5-34
5-4-2 Types of CompoNet Network Node Addresses......................................................................... 5-35
5-4-3 I/O Port Allocations for Each Communications Mode Numbers................................................ 5-36
5-4-4 Details on Allocation of I/O Ports to Slave Unit I/O Data........................................................... 5-42
5-4-5 Slave Unit Allocations for Communications Mode Number 8.................................................... 5-49
5-5 Remote I/O Communications Performance......................................................................... 5-52
5-5-1 I/O Response Time ................................................................................................................... 5-52
Section 6 Message Communications
6-1 Message Communications ..................................................................................................... 6-2
6-1-1 Overview of Message Communications...................................................................................... 6-2
6-1-2 Explicit Message Communications ............................................................................................. 6-2
6-1-3 Message Communications Specifications................................................................................... 6-2
6-1-4 Message Monitoring Timer ......................................................................................................... 6-3
6-2 Sending Explicit Messages .................................................................................................... 6-4
6-2-1 Sending Explicit Messages ......................................................................................................... 6-4
6-2-2 Sending Explicit Messages Using SendCmd Instruction .......................................................... 6-10
Section 7 Troubleshooting
7-1 Handling Errors........................................................................................................................ 7-2
7-1-1 CompoNet Master Unit Errors..................................................................................................... 7-2
7-1-2 Troubleshooting Sequence When an Error Occurs..................................................................... 7-2
7-2 Error History Function ............................................................................................................ 7-7
7-3 Event Logs ............................................................................................................................. 7-10
7-3-1 Overview of the Event Logs ...................................................................................................... 7-10
7-3-2 Error Table................................................................................................................................. 7-11
7-3-3 Error Descriptions ..................................................................................................................... 7-13
Appendices
A-1 Differences in Available Functions Depending on the CPU Unit (NJ or CJ Series) ..........A-2
A-1-1 Functional Differences ................................................................................................................A-2
A-1-2 Differences in Accessing Data from User Program.....................................................................A-2
A-2 Recommended CompoNet Cables .......................................................................................A-26
A-2-1 Recommended CompoNet Cables ...........................................................................................A-26
12 CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)