51
Basic Operating Procedure
Section 1-9
Modbus-RTU Slave Mode
The following example is for the default (standard) communications condi-
tions, with the Modbus slave address set to 1 and the default allocation areas
for Coils, Input Registers, and Holding Registers.
m = 100
×
unit number
Validate the New Settings
Make the new settings in the Setup Area valid by performing one of the follow-
ing.
• Turn the power OFF and then ON again. The Setup Area allocated in the
DM Area will be read when the power is turned ON.
• Restart the Board by turning ON the Inner Board Restart Bit (A60800) or
restart the Unit turning ON one of the CPU Bus Unit Restart Bits (A50100
to A50115, where the bit number corresponds to the unit number). (See
following table.)
• Restart the port on the Serial Communications Board by turning ON one
of the Communications Board Port Settings Change Bits (A63601 for port
1 and A63602 for port 2) or restart the port on the Serial Communications
Unit by tuning ON one of the Communications Unit Port Settings Change
Bits (A620 to A635: The word will be A620 + unit number and the bit will
be bit 01 for port 1 and bit 02 for port 2).
Board
(CS Series only)
Unit
(CS/CJ Series)
Bit
Setting
Meaning
Port 1
Port 2
Port 1
Port 2
D32000
D32010
m
m+10
15
0
Defaults
Parity: Even
Stop bits: 1 bit
Baud rate: 19,200 bps
(Start bits: 1 bit, Data length: 8 bits)
11 to 08
A hex
Modbus-RTU slave
D32001
D32011
m+1
m+11
03 to 00
0 hex
Disabled for default communications condi-
tions (baud rate: 19,200 bps)
D32006
D32016
m+6
m+16
15 to 08
1 hex
Modbus slave address: 1
D32020
D32030
m+20
m+30
07 to 00
0 hex
Coils allocation area: CIO Area
D32021
D32031
m+21
m+31
15 to 08
0 hex
Input Registers allocation area: CIO Area
07 to 00
0 hex
Holding Registers allocation area: DM Area
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...