Ladder Program - Omron V460-H Series Network Connection Manual

9.4. Ladder Program

9.4.1. Functional Components of Ladder Program
The functional components of the software part are as follows.
Category
1. Start and Setup
2. Open Processing
3. Send Processing
4. Receive Processing
5. Close Processing
Subcategory
1.1. Start Processing
1.2. Send Data Setting
1.3. Control Data Setting
1.4. Common Parameter Setting
1.5. Receive Data Storage Area Setting
1.6. Receive Processing Required/Not
Required Flag Setting
1.7. Error Code Storage Area Initialization
1.8. Initialization End Processing
2.1. Open Processing Start
2.2. Socket Service Parameter Area Setting
2.3. Open Request Switch ON
2.4. Normal/Error Judgment Processing
2.5. Error Code Storage Area Setting
3.1. Send Processing Start
3.2. Socket Service Parameter Area Setting
3.3. Send Request Switch ON
3.4. Normal/Error Judgment Processing
3.5. Error Code Storage Area Setting
4.1. Receive Processing Start
4.2. Socket Service Parameter Area Setting
4.3. Receive Request ON
4.4. Receive Request Switch ON
4.5. Normal/Error Judgment Processing
4.6. Receive Processing Repetition
Information Calculation
4.7. Error Code Storage Area Setting
5.1. Close Processing Start
5.2. Socket Service Parameter Area Setting
5.3. Close Request Switch ON
5.4. Normal/Error Judgment Processing
5.5. Error Code Storage Area Setting
9. Software Part
Description
Starts communications
processing and initializes
command settings, parameter
settings, and error code storage
area.
Executes TCP open (active)
processing.
Processing starts after
communications processing is
started and initial setup is done.
Executes send processing.
Processing starts if open
processing ends normally.
Starts processing if the Receive
Processing Required Flag is set
to Required and send
processing has ended normally.
If send data is divided and
arrives as multiple pieces,
receive processing is repeated.
Executes close processing.
Processing starts in the
following cases.
• Receive Processing
Required Flag is set to Not
required and send
processing has ended
normally.
• Receive processing ends
normally.
• Open processing ends
abnormally.
• Send processing ends
abnormally.
• Receive processing ends
abnormally.
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