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KB81514
Controller or serial brain becomes unresponsive after I/O communication on RS-485 serial link
Revision:  3.0
Published:  12/14/2011
Applies To
Firmware for:
SNAP-PAC-S1
SNAP-PAC-S2
SNAP-PAC-S1-W
SNAP-PAC-S2-W
SNAP-PAC-SB1
SNAP-PAC-SB2
Versions
Problem was introduced in versions:  
R8.3a SNAP-PAC-Sx
R8.1a SNAP-PAC-SBx

Problem is fixed in version:  
R9.1d

SYMPTOMS

If a controller (type SNAP-PAC-S) is communicating to one or more serial brains (type SNAP-PAC-SB, or Mistic brains such as B3000 or B3000-B), then communication to the brains may be lost after the controller has been powered up for 49.7 days. If this occurs, the controller stops communicating on the serial port the brains are connected to, and the charts in the PAC Control strategy that communicate to the serial brains stop executing. If data from a serial brain is being scanned through the controller's host port, then the host port may lock up.

This bug may or may not occur, but it can occur at intervals of 49.7 days since powering up the controller.

When using a SNAP-PAC-SB brain, the brain can stop communicating after it has been powered up 49.7 days (or at intervals of 49.7 days).

CASE STATUS

Opto 22 has resolved this issue.

Relevant Downloads
No relevant downloads have been specified.
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Email: support@opto22.com

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