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

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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