206
Auxiliary Area and CIO Area in Serial Gateway Mode Section 6-3
Inner Board CIO Area
CIO 1900 to CIO 1999
Serial Communications Units (CS/CJ Series)
Words are allocated in the CIO Area for Software Switches and Status Area.
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. The first word is used for Software Switches, and the remaining 24
words are used for the Status Area.
Status Area
The Status Area is used to read the Serial Communications Board’s or Unit’s
setting status, communications status, transmission control signal status, and
transmission error status.
Allocations
Direction: Board/Unit to CPU Unit (input)
n = CIO 1500 + 25
× unit number
CIO 1900 Software Switches (port 1/port 2)
CIO 1901 to CIO 1904 Board status
CIO 1905 to CIO 1914 Port 1 status
CIO 1915 to CIO 1924 Port 2 status
CIO 1925 to CIO 1999 Reserved for the system
Unit
number
Word
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
n: Software switches (ports 1 and 2)
n + 1 to n + 4: Unit status
n + 5 to n + 14: Port 1 status
n + 15 to n + 24: Port 2 status
Words Bit Contents
Board
(CS Series
only)
Unit
(CS/CJ Series)
Port 1 Port 2 Port 1 Port 2
1901 n+1 02 to 15 Reserved
01 1: Error log EEPROM error 0: Error log EEPROM normal
00 1: Protocol data error (SUM value error) 0: Protocol data normal
1902 n+2 00 to 15 Reserved
1903 n+3 00 to 15 Reserved
1904 n+4 00 to 15 Reserved
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