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KB62241
Possible 'Invalid address' errors, or no response from I/O unit
Revision:  2.0
Published:  6/26/2008
Applies To
Firmware for:
SNAP-PAC-S1
SNAP-PAC-S2
SNAP-PAC-R1
SNAP-PAC-R2
Versions
Problem was discovered in version:  
R8.1a
Problem is fixed in version:  
R8.2a

SYMPTOMS

An I/O unit may go offline, or the controller error queue may show -56 Invalid address errors for an I/O unit that has the Watchdog timeout option set in the Edit I/O Unit window. The error occurs because another controller or application such as PAC Manager, acknowledges the Power Up Clear (PUC) flag for an I/O unit that does not support high density I/O modules. Because the currently running controller did not receive the PUC, it mistakenly registers the I/O unit as a high-density module supporting device. Errors are reported when the controller attempts to configure the I/O unit at startup.

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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