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Why Are My Temperature Values Incorrect When Using Optomux Commands to Read My FP-TC-120?

Primary Software: Driver Software>>NI-FieldPoint
Primary Software Version: 4.1
Primary Software Fixed Version: N/A
Secondary Software: N/A
Hardware: FieldPoint>>Analog I/O Modules>>FP-TC-120

Problem: When I monitor the temperature readings in Fieldpoint Explorer or Measurement and Automation Explorer (MAX), the temperature values seem fine. However, when a program using optomux commands accesses the module, the values returned are wrong. Why?

Solution: The correct command to use when reading a FP-TC-120 scaled temperature value is !G. A common mistake is to use the L command instead which will yield incorrect results. This is discussed on page 38 of the programmer reference manual linked below.

Related Links:
FP-1000/1001 Programmer Reference Manual
FP-TC-120 and cFP-TC-120 Operating Instructions

Attachments:





Report Date: 09/12/2001
Last Updated: 04/05/2005
Document ID: 2DBCC46W

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