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KB80623
Serial brains cannot communicate simultaneously to multiple applications with Ethernet Pass-Through mode
Revision:  2.0
Published:  5/12/2010
Applies To
Firmware for:
SNAP-PAC-S1
SNAP-PAC-S2
SNAP-PAC-S1-W
SNAP-PAC-S2-W
Versions
Problem was introduced in version:  
R8.0a
Resolution is included beginning in version:  
B8.5f, Build date 8/19/2011
Problem is fixed in version:  
R9.0a

SYMPTOMS

If a control engine is communicating to a SNAP-PAC-SB1 or SNAP-PAC-SB2 brain and a PAC Manager application also communicates to the brain using Ethernet Pass-Through mode, then communication between the control engine and the brain stops and the following errors are reported to the control engine Message Queue:

Another symptom of this bug is when a chart or task that accesses I/O on the same controller's serial port, locks up. For example, this could be a PAC Control strategy chart that accesses serial I/O. Or this could be when PAC Display or another host tries to access serial I/O via the controller's host task. In these situations, the only solution is to cycle power to the controller.

CASE STATUS

Opto 22 has resolved this issue.

Relevant Downloads
No relevant downloads have been specified.
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