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A new lookup table used on a Sigma Analogue Output (AO) Object does not work

Issue

Created a new lookup table for an analogue output (AO) object to provide 10% steps and not 1% steps.  Displaying the object value always shows 1% steps.

Environment

Sigma Controller (All Versions)

Cause

The analogue output object value is the input value for the lookup table and the output of which is then passed to the A to D converter and then to the physical output.

Resolution

The value can be seen by a multimeter connected to the physical output.

If the value of the output needs to be displayed via the Sigma front end then a programmable object is required to process the lookup table and then cross referenced to a standard analogue output object (with the default lookup table).

Example of programmable object:

10 Xflo = POINT 0|51

20 YFLO = LOOKUP (1812, XFLO)

30 RETURN VIA TEXT 92 VALUE YFLO

Where POINT 0|51 is the control/input object and 1812 is the lookup table number.

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Revision #:
1 of 1
Last update:
‎2018-09-06 02:16 PM
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