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[KB73]Invalidity code for equipment and OPC variables

Tags: OPC, OPC-DA Server

Communication interfaces
16 years ago
By RM
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Applies to:

PcVue version 7.10c onwards.
Summary:

The code NS FMT is now used instead of NS IEEE to indicate a format problem (interpretation) for a variable.
Details:

If PcVue receives a variable from a PLC or OPC server in an unexpected format, it displays a new invalidity code NS FMT in the Variable Selector.

The code NS IEEE was previously used to indicate a variable conversion problem, e.g. with a Real or BCD (binary coded decimal) value.

Examples

  • An OPC server sends a text value for a register variable.
  • A register variable coming from a PLC is BCD coded yet PcVue is configured for a binary value. This generates the NS FMT code.

Created on: 15 Oct 2010 Last update: 13 May 2024