Skip to main content
InSource Solutions

TN DAS149 How to address DASMBCTP messages getting revoked due to message timeouts.

Description

 

This article from InSource discusses communications getting revoked on the Wonderware DASMBTCP DA Server.

  • Author: Joseph Hefner
  • Published: 10/24/2016
  • Applies to: DASMBTCP 2.0 or later.

Details

When this problem occurs you will see messages similar to the one below:

 

This is often caused by having the maximum outstanding message value to high.  To resolve this you can simply decrease this number to one as below:

 

Scenario 1)  Modbus Bridge is in use:

If you are using a Modbus Bridge, this setting is at the bridge level.  Change this value to a 1 and then deactivate and re-activate the DASMBTCP.

 

 

Scenario 2)  No Modbus bridge is in use:

If no bridge is in use this setting change should be made at the Modbus object level as below.  Again , this value should be set to 1 and them deactivate and re-activate the DASMBTCP.