Omron CJ - REFERENCE MANUAL 07-2009 User Manual

27
SECTION 3
Overview of FINS Commands
This section provides an overview of FINS commands.
3-1 FINS Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3-2 Using FINS Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3-2-1 Issuing and using any command (CMND (490) instruction) . . . . . . 31
3-2-2 Using with respect to a host computer connected by Host Link . . . 31
3-3 FINS Command and Response Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3-3-1 FINS Command Frame Configuration . . . . . . . . . . . . . . . . . . . . . . . 32
3-3-2 FINS Response Frame Configuration. . . . . . . . . . . . . . . . . . . . . . . . 32
3-3-3 Individual Items in Command/Response Frames . . . . . . . . . . . . . . . 33
3-4 Settings for Sending FINS Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3-4-1 FINS Command and Response Formats. . . . . . . . . . . . . . . . . . . . . . 35
3-4-2 Addresses in FINS Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3-4-3 Other FINS Command Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3-4-4 CMND(490) Setting Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3-5 FINS Commands with Host Link Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3-5-1 Connection Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3-5-2 Overview of Command and Response Frames. . . . . . . . . . . . . . . . . 44
3-5-3 Sending Commands from the Computer to the CPU Unit . . . . . . . . 45
3-5-4 Sending FINS Commands to the Host Computer from the CPU Unit 49
3-5-5 Sending Commands from the CPU Unit . . . . . . . . . . . . . . . . . . . . . 50
3-5-6 Command Format Received by the Host Computer. . . . . . . . . . . . . 55
3-5-7 Response Format Returned by the Host Computer . . . . . . . . . . . . . 57
3-5-8 Flags for Network Communications. . . . . . . . . . . . . . . . . . . . . . . . . 58
3-5-9 Timing of Commands to Host Computers . . . . . . . . . . . . . . . . . . . . 59
3-5-10 Programming Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3-6 Serial Gateway Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
3-6-1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
3-6-2 Types of Protocol Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
3-6-3 Converting FINS to CompoWay/F. . . . . . . . . . . . . . . . . . . . . . . . . . 67
3-6-4 Converting FINS to Modbus-RTU . . . . . . . . . . . . . . . . . . . . . . . . . . 70
3-6-5 Converting from FINS to Modbus-ASCII . . . . . . . . . . . . . . . . . . . . 73
3-6-6 Converting from FINS to Host Link FINS . . . . . . . . . . . . . . . . . . . . 74
3-6-7 Treating Serial Communications Paths as Networks . . . . . . . . . . . . 78
3-6-8 Using a PLC as the Target . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
3-6-9 Using a non-PLC Component as the Target . . . . . . . . . . . . . . . . . . . 81
3-6-10 Explanation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
3-7 Communications Frames. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
3-7-1 CompoWay/F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
3-7-2 Modbus-RTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
3-7-3 Modbus-ASCII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
3-7-4 Host Link FINS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
3-7-5 Sending Commands Using the CMND(490) Instruction . . . . . . . . . 90

Omron CJ - REFERENCE MANUAL 07-2009 Specifications

General

Category	Computer Hardware
Manufacturer	Omron
Model	CJ
Document Type	REFERENCE MANUAL
Publication Date	07-2009

Summary

Manual Usage and Compliance

Warranty and Limitations of Liability

Outlines OMRON's product warranty terms and limitations of liability.

Precautions

Safety Precautions

Emphasizes critical safety measures for PLC use, including power handling and unit disassembly avoidance.

Operating Environment Precautions

Details precautions for PLC system operation in various environments to ensure reliability and prevent malfunction.

Application Precautions

Lists essential safety and operational precautions for PLC system applications, covering grounding and component handling.

Section 2: Overview of C-mode Commands

2-1 C-mode Commands

Explains C-mode (Host Link) commands as a serial communication system between PLC and host computer.

Section 3: Overview of FINS Commands

3-1 FINS Commands

Section 4: C-mode Commands

4-1 C-mode Command List

4-3 C-mode Command Details

Offers detailed descriptions of individual C-mode commands, including format, parameters, limitations, and execution conditions.