255
Auxiliary Area and CIO Area Allocations Section 7-3
Serial Communications Units (CS/CJ Series)
n = A620 + unit number
Inner Board Error Information (CS-series Serial Communications Board Only)
A424 contains error information for the Serial Communications Board
Note 1. When any one of bits 05 to 11 is ON, A40208 (Inner Board Error Flag)
(non-fatal error) will be ON.
2. When bit 00 or 01 is ON, A40112 (Inner Board Fatal Error Flag) will be ON.
For details on errors, refer to Section 11 Troubleshooting and Maintenance.
CIO Area Allocations
Words in the CIO Area are allocated as Software Switches, which are manip-
ulated from the CPU Unit to control the operation of the Serial Communica-
tions Board or Unit, and for a Status Area, which contains status and error
information for the Serial Communications Board or Unit.
Serial Communications Boards (CS Series Only)
Words CIO 1900 to CIO 1999 in the Inner Board Area are used for the Soft-
ware Switches and Status Area. CIO 1900 contains software switches, and
the 24 words from CIO 1901 to CIO 1924 are used for the Status Area.In No-
protocol mode, only these words are used as the CIO Area. No other words
are used.
Words Bit Contents
n 03 to 15 Reserved
02 1: Port 2 Settings Change Bit
01 1: Port 1 Settings Change Bit
00 Reserved
Word Bit Type Contents
A424 12 to 15 Non-fatal
errors (Note
1)
Reserved
11 1 Error log EEPROM error; 0: Normal
10 1: Protocol macro execution error; 0: Nor-
mal
This bit will be turned ON when code 3,
4, or 5 is stored in the error code for bits
00 to 03 of CIO 1909 or CIO 1919 in the
CIO Area,
09 1: Protocol data error (SUM error); 0:
Normal
08 1: System setting error; 0: Normal
07 1: Routing table error; 0: Normal
06 Reserved
05 1: Cyclic monitoring error; 0: Normal
04 1: Inner Board service failure
(TXD(236)/RXD(235) sent to a pre-Ver.
1.2 Board that does not support no-proto-
col mode); Normal
03 Fatal errors
(Note 2)
Reserved
02 Reserved
01 1: Inner Bus error; 0: Normal
00 1: Inner Board WDT error; 0: Normal
CIO 1900 Software switch
CIO 1901 to CIO 1904 Board status
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