Incorrect default millivolt scaling for SNAP-AITM and SNAP-AIMV type modules on Ethernet I/O units

Applies To:

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

Versions Affected:

Problem was introduced in brain firmware version: 1.0
Problem is fixed in version: R7.1h

Resolved In Version:

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.

[image1]

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.

Questions?

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

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