Experimental Physics and Industrial Control System
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Here's - for reference - what OPC UA defines. Pretty close to CA. Using precision on time values is interesting and makes sense.
ValuePrecision can be used for the following DataTypes: For Float and Double values it specifies the number of digits after the decimal place. For DateTime values it indicates the minimum time difference in nanoseconds. For example, a ValuePrecision of 20 000 000 defines a precision of 20 ms. The ValuePrecision Property is an approximation that is intended to provide guidance to a Client. A Server is expected to silently round any value with more precision that it supports. This implies that a Client may encounter cases where the value read back from a Server differs from the value that it wrote to the Server. This difference shall be no more than the difference suggested by this Property.
- References:
- Normative types (again...) Timo Korhonen
- Re: Normative types (again...) Kasemir, Kay
- Re: Normative types (again...) Michael Davidsaver
- Re: Normative types (again...) Kasemir, Kay
- Re: Normative types (again...) Andrew Johnson
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ANJ, 16 Apr 2018 |
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