Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 104

I/O Memory Allocations
Serial Communications
Units (CS/CJ Series)
Setting the Setup Areas
The Setup Area allocated in the DM Area is used to set the serial communica-
tions mode, communications specifications, and other settings for the Serial
Communications Units. The words from D30000 to D31599 (100 words per
Unit × 16 Units) are allocated according to the unit number settings.
m = D30000 + 100 × unit number
Unit No. Words
Unit No. 0 D30000 to D30099
Unit No. 1 D30100 to D30199
Unit No. 2 D30200 to D30299
Unit No. 3 D30300 to D30399
Unit No. 4 D30400 to D30499
Unit No. 5 D30500 to D30599
Unit No. 6 D30600 to D30699
Unit No. 7 D30700 to D30799
Unit No. 8 D30800 to D30899
Unit No. 9 D30900 to D30999
Unit No. A D31000 to D31099
Unit No. B D31100 to D31199
Unit No. C D31200 to D31299
Unit No. D D31300 to D31399
Unit No. E D31400 to D31499
Unit No. F D31500 to D31599
The following methods can be used to set the Unit settings in the Setup
Areas.
• Use a Programming Device, such as a Programming Console (see note
a), CX-Protocol, or CX-Programmer.
• Use the STUP(237) instruction (see note b) in the ladder diagram pro-
gram. If it is necessary to change the System Setup while the ladder dia-
gram program is being executed, use this method to change the System
Setup.
Note a) If settings are changed from a Programming Device, cycle the
power to the CPU Unit, use a Restart Bit to restart the Unit or
Board, or use the Port Settings Change Bits to restart the port. Re-
fer to 2-2 Data Exchange with the CPU Unit for the specific ad-
dresses to use.
b) For the procedure used to change the System Setup using the
STUP(237) instruction, refer to Appendix R Changing Communi-
cations Port Settings Using STUP(237) .
The usage of the System Setup differs according to the serial communica-
tions mode. For details, refer to the following sections.
Host Link communications: Section 4 Using Host Link Communications.
Protocol macros:
1:N NT Links:
Loopback test:
m to m + 9: Port 1 Settings
m + 10 to m + 19: Port 2 Settings
m + 20 to m + 29: Port 1 Settings for Modbus-
m + 30 to m + 39: Port 1 Settings for Modbus-
m + 40 to m + 99: Reserved for the system
Section 5 Using Protocol Macros.
Section 8 Using 1:N NT Links.
Section 10 Loopback Test.
Section 2-3
RTU slave mode
RTU slave mode
75