![background image](http://html1.mh-extra.com/html/omron/sysmac-cj1w-scu21-v1/sysmac-cj1w-scu21-v1_operation-manual_743586281.webp)
252
Allocation DM Area for No-protocol Mode
Section 7-2
3.
If the end code will overlap with the send/receive data and cause data re-
ception to be interrupted, use CR+LF as the end code.
4.
If the send delay is set in the allocation DM Area when sending TXD(236)
or TXDU(256) (no-protocol mode), data will be sent when the send delay
time has lapsed after execution of TXD(236) or TXDU(256), as shown be-
low.
For details on the TXD(236), RXD(235), TXDU(256), and RXDU(255) instruc-
tions, refer to the
CS/CJ-series Instructions Reference Manual
(W340).
5.
If a no-protocol instruction is sent to a pre-Ver. 1.2 Board/Unit or the serial
port of a Board/Unit with Unit Ver. 1.2 or later using a serial communica-
tions mode other than no-protocol mode, the following operations will oc-
cur.
• If TXD(236)/RXD(235) is sent to the Board, Auxiliary Area bit A424204
(Inner Board Service Failure Flag) will turn ON.
• If TXDU(256)/RXDU(255) is sent to the Unit and the serial communi-
cations mode is set to protocol macro, NT Link, loopback test, or Serial
Gateway mode, an undefined command error (end code: 0401 hex)
will be returned.
If the serial communications mode is set to Host Link mode and the in-
struction will be converted to a slave-initiated function FINS command
and transferred. (Depending on the remote device, a response timeout
(end code: 0205 hex) is likely to be returned.)
Note
Do not program TXD(236)/RXD(235) instructions addressed to the serial port
(port 1/2) of the Serial Communication Board in both cyclic tasks and interrupt
tasks. If an interrupt task occurs during execution of a TXD(236)/RXD(235)
instruction addressed to the serial port (port 1/2) of the Serial Communica-
tions Board within a cyclic task, the TXD(236)/RXD(235) instruction
addressed to the serial port (port 1/2) of the Serial Communications Board
within the interrupt task will not be executed. An error will occur and the ER
Flag will turn ON. (This operation is also not possible in both cyclic tasks and
interrupt tasks for any combination of the TXD(236)/RXD(235) instruction and
ports 1/2.)
7-2
Allocation DM Area for No-protocol Mode
This section describes the Setup Area allocated to the Serial Communications
Board and Serial Communications Units in the DM Area when no-protocol
communications are used.
Setup Area Words
The Serial Communications Board and Serial Communications Units use the
following words as a Setup Area in the DM Area when no-protocol communi-
cations are used. The words allocated to the Serial Communications Board
are different from those allocated to the Serial Communications Units (which
are allocated words according to the unit numbers).
Send delay
TXD(236)
Send
Time
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...