Inner Board Area - Omron SYSMAC CS Series Operation Manual

Inner Board Area

CPU Bus Unit Area
Initialization
1,2,3...
IOM Hold Bit Operation
Forcing Bit Status

9-10 Inner Board Area

428
Unit number
E
F
The function of the 25 words depends upon the CPU Bus Unit being used. For
details, refer to the Unit's operation manual.
Words in the CPU Bus Unit Area that aren't allocated to CPU Bus Units can
be used only in the program.
Note The addresses in the CS-series CPU Bus Unit Area cannot be designated
directly in programming or allocations inside C200H Special I/O Units.
The contents of the CPU Bus Unit Area will be cleared in the following cases:
1. The operating mode is changed from PROGRAM to RUN or MONITOR
mode or vice-versa and the IOM Hold Bit is OFF.
2. The PLC's power supply is cycled and the IOM Hold Bit is OFF or not pro-
tected in the PLC Setup.
3. The CPU Bus Unit Area is cleared from a Programming Device.
4. PLC operation is stopped when a fatal error other than an FALS(007) error
occurs. (The contents of the CPU Bus Unit Area will be retained when
FALS(007) is executed.)
If the IOM Hold BIt (A50012) is ON, the contents of the CS-series CPU Bus
Unit Area won't be cleared when a fatal error occurs or the operating mode is
changed from PROGRAM mode to RUN/MONITOR mode or vice-versa.
If the IOM Hold BIt (A50012) is ON and the PLC Setup's "IOM Hold Bit Status
at Startup" setting is set to protect the IOM Hold Bit, the contents of the CS-
series CPU Bus Unit Area won't be cleared when the PLC's power supply is
cycled.
Bits in the CPU Bus Unit Area can be force-set and force-reset.
The Inner Board Area contains 100 words with addresses ranging from
CIO 1900 to CIO 1999. Words in the Inner Board Area can be allocated to an
Inner Board to transfer data such as the operating status of the Unit. All 100
words must be allocated to just one Inner Board.
Data is exchanged with the Inner Board once each cycle during normal I/O
refreshing, which occurs after program execution. Depending on the type of
Inner Board that is mounted, data can also be refreshed directly.
The function of the 100 words in the Inner Board Area depends upon the
Inner Board being used. For details, refer to the Board's Operation Manual.
When the words in the Inner Board Area aren't allocated to an Inner Board,
they can be used only in the program.
Allocated words
CIO 1850 to CIO 1874
CIO 1875 to CIO 1899
Inner Board
CPU Unit
I/O re-
freshing
Section 9-10
Inner Board Area
(100 words/Board)