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Mitsubishi Computer Link Master (A-compatible 1C Frame, Model 1)
Appendix E
Loopback Test
(Sequence No. 818 (Hex 0332)) (Command Code: TT)
This sequence executes a loopback test at the Mitsubishi Computer Link Module with the specified station
number (and the PLC number that follows). (E.g, if the data starting from the specified word + 3 is sent from the
host, the Computer Link Module will return the data unchanged to the host.)
Send Data Word Allocation (3rd Operand of PMCR(260))
Receive Data Word Allocation (4th Operand of PMCR(260)
Offset
Contents (data format)
Data
+0
Number of send data words
(4 digits hex)
Always 0005 hex (5 decimal)
+1
Station No.
(2 digits hex)
PLC No.
(2 digits hex)
Station No.: 00 to FF hex
PLC No.: 00 to FF hex
+2
(Undefined) Data
length
(2 digits hex)
Set the number of bytes of loopback
data in S+3 onwards.
+3
Loopback data
Set the loopback data to send.
+0
+1
+2
+3
Number of send data words
PLC No.
Station No.
Data length
(Undefined)
Loopback data
First word of
send data
Offset
Contents (data format)
Data
+0
Number of receive data words
0002 to 00FA hex (2 to 250 decimal)
+1
Station No.
(2 digits hex)
PLC No.
(2 digits hex)
Station No.: 00 to FF hex
PLC No.: 00 to FF hex
+2
Data length
(2 digits hex)
The data length for the loopback data is
stored.
+3
Loopback data
The loopback data is stored
unchanged.
+0
+1
+2
+3
Number of receive data words
PLC No.
Station No.
Data length
Loopback data
Receive data
storage words
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...