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KB52706
Incorrect default millivolt scaling for SNAP-AITM and SNAP-AIMV type modules on Ethernet I/O units
Revision:  4.0
Published:  10/19/2006
Applies To
Firmware for:
SNAP-PAC-R1
SNAP-PAC-R2
SNAP-UP1-ADS
SNAP-UP1-M64
SNAP-M64
SNAP-B3000-ENET
Versions
Problem was introduced in brain firmware version:  
1.0
Problem is fixed in version:  
R7.1h

SYMPTOMS

Using the default scaling for a SNAP-AITM or SNAP-AIMV type module configured as a millivolt input module, causes the value reported to be off by a factor of 1000 (3 decimal places). The SNAP‑AITM module types are SNAP-AITM, SNAP-AITM-i, SNAP-AITM-2, and SNAP-AITM2-i. The SNAP-AIMV module types are SNAP-AIMV-4 and SNAP-AIMV2-4.

As seen in this ioManager example, a SNAP-AITM point left at the default scaling range for a millivolt input, reports 0.150 in the Upper Scaled Units field, and –0.150 in the Lower Scaled Units field. The values should actually be 150.000 and –150.000, respectively.

Millivolt input points configured with custom scaling, display the correct values in these fields. Also, inputs configured as thermocouples are not affected.

RESOLUTION

Opto 22 has resolved this issue.

Relevant Downloads
No relevant downloads have been specified.
Questions? Contact Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com

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