33
Specifications
Section 1-6
No-protocol Specifications
Item
Description
Communications
mode
Full-duplex
Baud rate
RS-232C port and RS-422A/485 ports:
1,200/2,400/4,800/9,600/19,200/38,400/57,600 bps
Default setting: 9,600 bps
Messages (commu-
nications frame
structure)
Set either of the following types in the Setup Area in the allo-
cation DM Area.
1. Data only (without start code and end code)
2. Start code + data
3. Data + end code
4. Start code + data + end code
5. Data + CR + LF
6. Start code + data +CR + LF
Set in allocated DM Area
(The start code can be included by setting it to between 00
and FF hex, and the end code can be included by setting it to
between 00 and FF hex. To exclude the end code, set the
number of receive data bytes.)
Start code
None or 00 to FF hex
End code
None, 00 to FF hex, or CR + LF
Number of receive
data bytes during
reception
Set the number of receive data bytes
between 1 and 256 bytes (according to
the DM Area settings) when frame struc-
ture 1 or 2 above is used.
Sending messages
• Serial Communications Board: TXD(236) instruction
• Serial Communications Unit: TXDU(256) instruction
Receiving messages • Serial Communications Board: RXD(235) instruction
• Serial Communications Unit: RXDU(255) instruction
Maximum message
length
Sending and receiving: Up to 259 bytes including the start
code and end code (up to 256 bytes excluding start/end
codes)
Data conversion
No conversion
Communications
protocol
None
Message delay time
When the TXD(236) or TXDU(256) instruction is executed,
after the send delay time, the data is sent from the port.
0 to 300 s (0 to 300,000 ms)
(Can be set in 10-ms units depending on the DM Area set-
tings)
Receive counter
The number of data bytes (0 to 256) received at the port can
be counted.
Reception buffer
clear timing
The reception buffer is cleared immediately after executing the
RXD(235)/RXDU(255) instruction
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...