Omron CJ - REFERENCE MANUAL 07-2009 - Section 3: Overview of FINS Commands; 3-1 FINS Commands

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