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CompoWay/F Master Protocol
Appendix B
Communications Specifications
Transmission Procedure
The PLC or host computer serving as the master sends a command and the component serving as the slave
returns a response for the command message contained in the command. One response message is returned
for each command message. The movement of command and response messages is shown below.
Command and Response Formats
Note
In the following diagrams “Hex” indicates hexadecimal values. Values in quotation marks, such as “00”
indicate ASCII characters.
Command Format
Response Format
Note
1.
Data is not saved in the response if there is a command frame error (i.e., if the end code is not 00 or
0F).
2.
Other values are possible for the subaddress and SID.
Item
Specification
Transmission path
connections
Multipoint
Communications
RS-232C, RS-422A/485, 4-wire half-duplex, 2-wire half-duplex
Synchronization
Start-stop
Baud rate
1,200/2,400/4,800/9,600/19,200/38,400 bps
Default: 9,600 bps
Transmitted code
ASCII
Data length
7 bits or 8 bits (Default: 7 bits)
Note: A 7-bit code is used with 0 added to the beginning.
Stop bits
1 bit or 2 bits (Default: 2 bits)
Error detection
Horizontal parity (none, even, or odd) (Default: Even)
BCC (block check character)
*1: Start-stop Sync Data Configuration for Protocol Macros
LRC, 1 byte, equivalent to binary
Master (PLC or host computer)
Slave (component)
Command message
Response message
Node No.
Subaddress
Command
Text
1 byte
2 bytes
2 bytes
1 byte
1 byte
1 byte
Data
"00"
"0"
Node No.
Subaddress
End code
Response
Text
1 byte
2 bytes
2 bytes
2 bytes
1 byte
1 byte
Data
(See note.)
"00"
"00"
Summary of Contents for SYSMAC CJ1W-SCU21-V1
Page 3: ...iv...
Page 5: ...vi...
Page 9: ...x...
Page 15: ...xvi...
Page 89: ...60 Basic Operating Procedure Section 1 9...
Page 151: ...122 RS 232C and RS 422A 485 Wiring Section 3 4...
Page 173: ...144 Host Link Function for Replacing Existing PLCs Section 4 6...
Page 223: ...194 Enhanced Protocol Macro Functions Section 5 6...
Page 277: ...248 Communications Frames Section 6 8...
Page 291: ...262 Basic Operating Procedure in No protocol Mode Section 7 4...
Page 301: ...272 Auxiliary Area and CIO Area Allocations Section 8 3...
Page 391: ...362 Introduction Appendix A...
Page 421: ...392 CompoWay F Master Protocol Appendix B...
Page 513: ...484 E5 K Digital Controller Read Protocol Appendix F...
Page 571: ...542 E5ZE Temperature Controller Write Protocol Appendix I...
Page 587: ...558 E5 J Temperature Controller Protocol Appendix J...
Page 627: ...598 ES100 Digital Controller Protocol Appendix K...
Page 661: ...632 V500 V520 Bar Code Reader Protocol Appendix M...
Page 697: ...668 3Z4L Laser Micrometer Protocol Appendix N...
Page 717: ...688 Visual Inspection System Protocol Appendix O...
Page 755: ...726 V600 V620 ID Controller Protocol Appendix P...
Page 763: ...734 Hayes Modem AT Command Protocol Appendix Q...
Page 767: ...738 Changing Communications Port Settings Using STUP 237 Appendix R...
Page 781: ...752 Revision History...