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KB53950
Analog input point filtering continues to include out of range count values, ‑32768, on Ethernet I/O units
Revision:  2.0
Published:  10/19/2006
Applies To
Firmware for:
SNAP-PAC-R1
SNAP-PAC-R2
SNAP-UP1-ADS
SNAP-UP1-M64
SNAP-UP1-D64
SNAP-B3000-ENET
SNAP-ENET-D64
SNAP-ENET-S64
Versions
Problem was discovered in version:  
R7.0a
Resolution is included beginning in beta version:  
B7.1h
Problem is fixed in version:  
R7.1h

SYMPTOMS

On Ethernet I/O units, when an analog input module reading is out of range, the counts go to ‑32768 and scaling to engineering units stops, but filtering continues to be calculated. The raw count value of ‑32768 is passed into the filtering function, affecting the filtered value. Over time, the engineering units incorrectly trend toward ‑32768. Reapplying a valid signal causes scaling to once again be performed prior to filtering, and engineering units trend toward the correct value.

RESOLUTION

Opto 22 has resolved this issue.

Relevant Downloads
No relevant downloads have been specified.
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