KB52576
Published: February 14, 2007
Revision: 2.0

Unexpected results if SNAP-AITM type module or SNAP-AIRTD is reconfigured with a different Point Type


Applies To:

SNAP-PAC-R1
SNAP-PAC-R2
SNAP-UP1-ADS
SNAP-UP1-M64
SNAP-B3000-ENET
SNAP-ENET-S64

Versions Affected:

Problem was discovered in version: R7.1f
Problem is fixed in version: R8.0a, For SNAP-PAC-R1 and SNAP-PAC-R2

Resolved In Version:

Problem is fixed in version: R8.0a, For SNAP-PAC-R1 and SNAP-PAC-R2


Symptoms:

If a point on a SNAP-AIRTD or SNAP-AITM type module has been configured as an RTD or thermocouple Point Type, respectively, subsequent point reconfigurations of the same point may produce invalid readings.

For example, if a thermocouple point on a SNAP-AITM was once configured as a Type K (0x08) thermocouple Point Type, and is later configured as a +/- 150 mV (0x42) Point Type, the readings as a millivolt input point are not within the expected range.

Likewise, if a SNAP-AIRTD is first configured as a RTD Point Type 100 ohm NI RTD (0x2E) and is later reconfigured as a Generic Input (0x01) Point Type, the readings will not be within range.


Workaround:

The problem can be corrected on the SNAP-AITM type module if the new Point Type is another thermocouple, the brain is reset, or the point configurations are cleared, such as with ioManager’s Status Write→Reset points to defaults command.

For SNAP-AIRTD modules, the problem may be corrected if the brain is reset, or the point configurations are cleared with ioManager’s Tools→Status Write→Reset points to defaults command.


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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