KB52179
Published: June 19, 2006
Revision: 1.0

Reference to a PID by another PID may cause an ‘Undefined command’ error in ioControl


Applies To:

ioControl Professional
ioControl Basic

Versions Affected:

Problem was discovered in version: R7.1d


Symptoms:

An ioControl strategy with two PIDs that reference each other may cause an ‘Undefined command’ error when the strategy is downloaded.


Workaround:

Rename the PID loops so that the PID loop that is referenced by another is compiled first.

In the above example, renaming the loops in the following manner will work around the problem:

Reheat_2_Inner_Loop
to:
Reheat_2_Z_Inner_Loop

Or

Reheat_2_Outer_Loop
to:
A_Reheat_2_Outer_Loop


Resolution:

Opto 22 is researching this issue.


Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com


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