Opto 22

43044 Business Park Drive, Temecula, CA 92590 USA
Local & outside the USA:(951) 695-3000
Toll-Free within the USA:(800) 321-6786
Fax: (951) 695-3095
Email: sales@opto22.com
 
KB52576
Unexpected results if SNAP-AITM type module or SNAP-AIRTD is reconfigured with a different Point Type
Revision:  2.0
Published:  2/14/2007
Applies To
Firmware for:
SNAP-PAC-R1
SNAP-PAC-R2
SNAP-UP1-ADS
SNAP-UP1-M64
SNAP-B3000-ENET
SNAP-ENET-S64
Versions
Problem was discovered in version:  
R7.1f
Problem is fixed in version:  
R8.0a
Problem is fixed in version:  
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.

MORE INFORMATION

Bug may be seen when using the following modules: SNAP-AITM SNAP-AITM-i SNAP-AITM2 SNAP-AITM2-i SNAP-AIRTD

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

DISCLAIMER

This Opto 22 Knowledge Base ('OptoKB') article is intended to provide general technical information on a particular subject or subjects and is not an exhaustive treatment of such subjects. Accordingly, the information in this OptoKB article is not intended to constitute application, design, software, or other professional engineering advice or services. Opto 22 may modify the OptoKB articles at any time. Before making any decision or taking any action which might affect your equipment, you should consult a qualified professional.

OPTO 22 DOES NOT WARRANT THE COMPLETENESS, TIMELINESS, OR ACCURACY OF THE DATA CONTAINED IN THIS OPTOKB ARTICLE AND MAY MAKE CHANGES THERETO AT ANY TIME AT ITS SOLE DISCRETION WITHOUT NOTICE. FURTHER, ALL INFORMATION CONVEYED HEREBY IS PROVIDED TO USERS 'AS IS.' IN NO EVENT SHALL OPTO 22 BE LIABLE FOR ANY DAMAGES OF ANY KIND INCLUDING DIRECT, INDIRECT INCIDENTAL, CONSEQUENTIAL, LOSS PROFIT, OR DAMAGE, EVEN IF OPTO 22 HAS BEEN ADVISED ON THE POSSIBILITY OF SUCH DAMAGES.

OPTO 22 DISCLAIMS ALL WARRANTIES WHETHER EXPRESSED OR IMPLIED WITH RESPECT TO THE INFORMATION (INCLUDING HARDWARE, SOFTWARE, AND/OR FIRMWARE) PROVIDED HEREBY, INCLUDING THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTIBILITY, AND NON-INFRINGEMENT. Note that certain jurisdictions do not sanction the exclusion of implied warranties: thus, this disclaimer may not apply to you.

Copyright © 2016 Opto 22. All rights reserved.

My.Opto22

All Opto22

Request Information
  • FREE Product Brochure
  • Product Demonstration
  • PreSales Engineering Assistance

Opto 22 Product Support

Opto 22 Product Support is FREE Monday through Friday 7 a.m. to 5 p.m. Pacific Time

Product Support Numbers:

Local: (951) 695-3080
Toll-Free: (800) 835-6786
Fax: (951) 695-3017
support@opto22.com

Products

None

Downloads

None

Documents

None