Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 49)

Chapter
4
Publication 2706-817
Planning an Application
This chapter covers the following topics:
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Design checklist
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Safety considerations
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Applications and projects
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Messages
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Triggering a message
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Controlling devices
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Slaving
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Slave Device
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Historical Event Stack
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Function keys
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Function key types
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LED indicators
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Handshaking
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Tags
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Data types
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Address worksheet
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Defining tags
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Scaling data display variables
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Scaling data entry variables
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Precision and rounding.
Before creating an application, check the following:
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Plan the application: what is it supposed to do, and how?
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Outline the documentation the operator will work from.
Finish it after the application is completed.
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Consider safety requirements.
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Review data types and data formats.
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Fill in the Address Worksheet (Appendix H).
n
Review communications (Chapter 5).
Design Checklist