KB53389
Published: September 5, 2006
Revision: 2.0

Downloading and starting an ioControl strategy with PIDs on Ethernet-based I/O units, may cause outputs to spike


Applies To:

SNAP-PAC-R1
SNAP-PAC-R2
SNAP-UP1-ADS
SNAP-UP1-M64
SNAP-B3000-ENET

Versions Affected:

Behavior is present in version: R7.1a


Symptoms:

A PID output with a host-based setpoint on Ethernet-based I/O units, may spike when a just-downloaded ioControl strategy is started. The spike occurs while the strategy goes through the Init_IO (initialize I/O) chart.


Workaround:

In the ioControl Configurator Add PID Loop dialog, configure the Initial Value for the Setpoint from Host to its most common operating value. By doing so, there will be little or no spike when the strategy transitions form its initial starting value to the value set by the running strategy.


Resolution:

Opto 22 is aware of this issue.


Questions?

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


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