91
Installing Serial Communications Units
Section 3-2
3-1-1
Precautions in Handling the Board
• Turn OFF the power supply to the CPU Unit before mounting or connect-
ing the Board.
• Separate the port connector lines from the high-tension or power lines to
reduce external noise.
• Leave the port cover attached when not using a communications port.
3-2
Installing Serial Communications Units
3-2-1
System Configuration Precautions
• Words in I/O memory are allocated to the Serial Communications Unit
according to the setting of the unit number switch on the front panel of the
Unit. Allocations are not affected by the slot in which the Unit is mounted.
Refer to
2-3 I/O Memory Allocations
.
•
For CS-series PLCs, Serial Communications Units can be mounted to
CS1W-BC
@@
8 CPU Backplanes and CS1W-BI
@@
3 Expansion Back-
planes. Up to 16 Serial Communications Units can be mounted for each
PLC (as long as no other CPU Bus Units are mounted).
•
For CJ-series PLCs, Serial Communications Units can be connected in
the CPU Rack or Expansion Rack. (No more than 10 optional Units can
be connected in each Rack.) Up to 16 Serial Communications Units can
be connected in each PLC (as long as no other CPU Bus Units are
mounted).
Port cover
-V1
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...