
Advant
®
Smart Device (HART
®
) Interface User’s Guide
Section 2.4.3 Techniques of Mapping Smart Device Variables to Advant OCS
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acknowledgment, it can overwrite the data image table it maintains with fresh data. This
technique is especially useful for reading digital data rapidly.
Writing to Coils or Registers
There are four methods to write to coils and registers:
• ROC, Read Output Coil
• ROR, Read Output Register
• DFOA-C, Define Output Only Area - Coil
• DFOA-R, Define Output Only Area - Register
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