4-1SectionOverview
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4-1 Overview
The Customizable Counter Unit exchanges data with the CPU Unit in the follow-
ing 3 areas.
1. Using allocated words in the CPU Unit’s CIO Area.
2. Using allocated words in the CPU Unit’s DM Area.
3. Using the Customizable Counter Unit’s LR Area.
4-1-1 Overview of Data Exchange Areas
12 contact inputs
8 contact outputs
2 pulse inputs
2 pulse outputs or 2
analog outputs
Customizable Counter Unit
CPU Unit
Ladder program Ladder program
SR Area
Initial Setup Area
User-set words
User-set words
LR Area
Allocated CIO
Area words
Allocated DM Area words
User-set words
User-set words
1. Data exchanged using
allocated CIO Area words
Exchanged at I/O refresh.
2. Data exchanged using
allocated DM Area words
Transferred at startup
or at Unit restart.
Transferred at I/O
refresh.
3. Data exchanged using
LR Area words.
Transferred at I/O
refresh.
Contact I/O
Special I/O
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