Exchanging Data With The Cpu Unit; Outline Of Data Exchange - Omron CJ1W-AD041-V1 Manual

Exchanging Data with the CPU Unit

3-5 Exchanging Data with the CPU Unit
3-5-1

Outline of Data Exchange

CJ-series CPU Unit
2000 + n x 10
10
words
2000 + n x 10 + 9
D20000 + n x 100
100
words
D20000 + n x 100 + 99
n: Unit number
• Route input cables separately from the AC cable, and do not run the Unit's
cables near a main circuit cable, high voltage cable, or a non-PLC load
cable.
• If there is noise interference from power lines (if, for example, the power
supply is shared with electrical welding devices or electrical discharge
machines, or if there is a high-frequency generation source nearby) install
a noise filter at the power supply input area.
Data is exchanged between the CPU Unit and the CJ1W-AD041-V1/081-V1
Analog Input Unit via the Special I/O Unit Area in the CIO Area (for data used
to operate the Unit) and the Special I/O Unit Area in the DM Area (for data
used for initial settings).
I/O Refresh Data
Analog input conversion values, which are used as data for Unit operation, are
allocated in the Special I/O Unit Area of the CPU Unit according to the unit
number, and are exchanged during I/O refreshing.
Fixed Data
The Unit's fixed data, such as the analog input signal ranges and the number
of operational mean value buffers is allocated in the Special I/O Unit Area in
the DM Area of the CPU Unit according to the unit number, and is exchanged
when the power is turned ON or the Unit is restarted.
The conversion time and resolution can be set, along with the operation
mode.
Special I/O Unit Area
Analog inputs
Analog inputs
:
DM (Data Memory) Area
Input signal range
Number of opera-
tional mean value
buffers
:
Conversion time/
resolution and
operating mode
CJ1W -AD041-V1/081-V1 Analog Input Unit
I/O Refresh Data
Exchanges analog input val-
ues during data refresh.
I/O refresh
Fixed Data
Transmits fixed data such
as analog input signal
ranges and number of
Power ON or operational mean value
Unit restart buffers. .
Section 3-5
See 3-5-5 I/O
Refresh Data
Allocations for
details.
See 3-5-4 Fixed
Data Allocations
for details.
99