Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 309

Auxiliary Area and CIO Area Allocations (Modbus-RTU Slave Mode)
Serial Communications
Boards (CS Series only)
Serial Communications
Units (CS/CJ Series)
Status Area
Words
Boards Units
(CS Series only) (CS/CJ Series)
Port 1 Port 2 Port 1
CIO 1901 n + 1
CIO 1902 n + 2
CIO 1903 n + 3
CIO 1904 n + 4
280
Words CIO 1900 to CIO 1999 in the Inner Board Area are used for a Status
Area. Only the words shown in the following table are used for the Status Area
with Modbus-RTU Slave communications.
Inner Board CIO Area
CIO 1900 to CIO 1999
Words
CIO 1901 to CIO 1904
CIO 1905 to CIO 1914
CIO 1915 to CIO 1924
Words CIO 1500 to CIO 1899 in the CPU Bus Unit Area in the CIO Area are
allocated according to the unit number setting. Each Unit is allocated 25
words. Only the words shown in the following table are used for the Status
Area with Modbus-RTU Slave communications.
CPU Bus Unit Area
CIO 1500 to CIO 1899
n = CIO 1500 + 25 × unit number
Unit No.
Unit No. 0 CIO 1500 to CIO 1524
Unit No. 1 CIO 1525 to CIO 1549
Unit No. 2 CIO 1550 to CIO 1574
Unit No. 3 CIO 1575 to CIO 1599
Unit No. 4 CIO 1600 to CIO 1624
Unit No. 5 CIO 1625 to CIO 1649
Unit No. 6 CIO 1650 to CIO 1674
Unit No. 7 CIO 1675 to CIO 1699
Unit No. 8 CIO 1700 to CIO 1724
Unit No. 9 CIO 1725 to CIO 1749
Unit No. A CIO 1750 to CIO 1774
Unit No. B CIO 1775 to CIO 1799
Unit No. C CIO 1800 to CIO 1824
Unit No. D CIO 1825 to CIO 1849
Unit No. E CIO 1850 to CIO 1874
Unit No. F CIO 1875 to CIO 1899
The Status Area is used for status information input from Serial Communica-
tions Board or Unit to the CPU Unit. The Status Area is where the Serial Com-
munications Board or Unit set communications status, the transmission
control signal status, and the transmission error status.
Bit
Port 2
02 to 15 Reserved
01 1: Error log EEPROM error
00 1: Protocol data error
00 to 15 Reserved
00 to 15 Reserved
00 to 15 Reserved
Board status
Port 1 status
Port 2 status
Words
n + 1 to n + 4: Unit status
n + 5 to n + 14: Port 1 status
n + 15 to n + 24: Port 2 status
n = CIO 1500 + 25 × unit number
Contents
0: Error log EEPROM normal
0: Protocol data normal
Section 9-3
Usage