KB80374
Published: December 5, 2008
Revision: 2.0

'Get & Restart Period' command returns zero for period measurement


Applies To:

SNAP-PAC-R1
SNAP-PAC-R2
SNAP-PAC-EB1
SNAP-PAC-EB2
SNAP-PAC-SB1
SNAP-PAC-SB2

Versions Affected:

Problem was discovered in version: R8.2a
Problem is fixed in version: R8.3a

Resolved In Version:

Problem is fixed in version: R8.3a


Symptoms:

The Get & Restart Period command may return a 0 even after the Get Period Measurement Complete Status command returns a true response, and is used to determine if the period measurement is complete. The period measurement is not actually complete, and results in a partial period measurement (or a 0).


Workaround:

Add a delay after the Get & Restart Period command, and before the next Get Period Measurement Complete Status command. The delay should be the Digital Features Scan Interval value + 1 ms. Use PAC Manager to inspect this value with Tools→Inspect, Status Write. For an I/O unit with a 1 ms delay as shown below, the delay would be 2 ms.

[image1]


Resolution:

Opto 22 has resolved this issue.


Questions?

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


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