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KB58578
'Move I/O Unit to Numeric Table' PAC Control command causes intermittent error -3
Revision:  4.0
Published:  12/12/2007
Applies To
Firmware for:
SNAP-PAC-S1
SNAP-PAC-R1
SNAP-PAC-R2
SNAP-UP1-ADS
SNAP-UP1-M64
SNAP-UP1-D64
SNAP-LCE
Versions
Problem was discovered in version:  
R8.0e SNAP PAC control engines
Problem was discovered in version:  
R7.2d Ultimate I/O control engines

Problem is fixed in version:  
R8.0f SNAP PAC control engines
Problem is fixed in version:  
R7.2h Ultimate I/O control engines

SYMPTOMS

When using the Move I/O Unit to Numeric Table command in a PAC Control strategy, a possible "‑3 Buffer overrun or invalid length error." error message may be posted to the control engine error queue.

WORKAROUND

Instead of using the command:

    MoveIoUnitToNumTable(I/O Unit, Starting Index, Table)

use the command:

    MoveIoUnitToNumTableEx(I/O Unit, Table, Starting Index, Points per Module)

Notice the commands call the Table and Starting Index parameters in reverse order.

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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