Allocated Cio Area Words - Omron CJ1W-PNT21 Operation Manual

Allocated CIO Area Words

5-2 Allocated CIO Area Words
5-2-1 Software Switches 1 (Word n)
64
For each CPU Bus Unit, the CJ-series PLC allocates up to 25 words in the
CIO area. First word n = CIO 1500 + (25 x Unit number).
Word Bit 15
n
n+1
n+2
n+3
n+4
n+5
n+6
n+7
n+8
n+9
n+10
n+11
n+12
IO Device Data-Exchange Active flags
n+13
n+14
n+15
n+16
n+17
n+18
n+19
n+20
n+21
n+22
n+23
n+24
CIO Word n+1 to n+3 and CIO Word n+8 are reserved for future use, and can't
be used because the CJ1W-PNT21 clears these words every PLC cycle. The
other CIO Words are explained in the following sections.
The switches of Software Switch 1 execute a function when turned ON by the
user (in any PLC mode). The Unit state is not restored after a Power-Down of
the PLC.
15 14 13 12 11 10 9
Word n
CIO WORDS
Bit 00
Software switches 1
Reserved
Reserved
Reserved
Unit status word
IO Controller status word 1
IO Controller status word 2
IO Device status word
Reserved
IO Device New-Alarm flags
Figure 5.2: CIO words
8 7 6 5 4 3
Figure 5.3: Word n
Section 5-2
Data direction
CPU Unit to PROFINET IO Unit
PROFINET IO Unit to CPU Unit
2 1 0
Clear all alarms flags
Set Output Data valid