Overview; Data Flow - Omron CJ1W-CTL41-E Operation Manual

4 Exchanging Data with CPU
4-1

Overview

4-1-1

Data Flow

The CPU Unit and the high-speed Counters exchange data via the I/O port created for the Counter
Unit.
The table and figure below show the data exchange method for each data type.
Data exchange type
Unit data type
For Inputs
For Outputs
For Settings *2
Range data *2
Comparison data *2
Unit Restart Bit, etc.
*1 While *_UnitInitSta (Unit Busy) is 1, I/O is not refreshed. (For example, Counter Values are not refreshed dur-
ing this time.)
*2 The setting data, range data, and comparison data are retained in the CPU Unit by the battery even during
power interruptions.
4-2
AT specification
Data contents
destination
Count start and stop, I/O port (for Inputs,
count value, status Outputs)
of each Counter, etc.
External output con-
I/O port (for Set-
trol, external input tings)
function setting, set-
tings for each Coun-
ter, etc.
Range data Memory used for
CJ-series Unit
Comparison data
Unit Restart Bit, etc. None
CJ-series 4-Channel Counter Unit Operation Manual for NJ-series CPU Unit (W512)
How to access Timing of data
from user program exchange
Device variable for At I/O refreshing *1
CJ-series Unit
When the Controller
is reset or the Unit
restarts
User-defined Vari-
able
System-defined vari- At I/O refreshing
able