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Trusted

AN-T80010

Issue 3 Feb 08 AN-T80010 1

Application Note

Module Misallocation Check

Technical Alert TA20003 describes a rare situation where an I/O module may be allocated to an

incorrect application board definition on startup. The module may then appear to be in a different

chassis and slot location. The result of this is that a module’s channel connections may be allocated to

the wrong application variables.

This document describes how to check for module misallocation, using the Toolset’s online debugging

tools.

Issue Record

Issue

Number

Date Revised by Technical

Check

Authorised by Modification

1 Nov 07 Nick Owens Pete Stock Initial Issue

2 Nov 07 Nick Owens Pete Stock Gerry Creech Primary position

3 Feb 08 Nick Owens Pete Stock Gerry Creech Startup

Summary of content (4 pages)

PAGE 1
TrustedTM AN-T80010 Application Note Module Misallocation Check Technical Alert TA20003 describes a rare situation where an I/O module may be allocated to an incorrect application board definition on startup. The module may then appear to be in a different chassis and slot location. The result of this is that a module’s channel connections may be allocated to the wrong application variables. This document describes how to check for module misallocation, using the Toolset’s online debugging tools.
PAGE 2
TrustedTM AN-T80010 Module Misallocation Check 1. Module Misallocation Check 1.1. Online Toolset Connection To connect to the system using the toolset, follow the following procedure. Open the Toolset ( Start | All Programs | Trusted | Toolset ) Open the project for the system you will connect to by double-clicking on its name. It is possible to connect to the system using either the processor’s front panel serial port or over Ethernet via a communications interface.
PAGE 3
TrustedTM AN-T80010 Module Misallocation Check 1.2. I/O Connection table To open the I/O connection table, use the window entitled IEC1131 TOOLSET – (application) – Debug programs. You cannot close this window. To end an online session, close the Debugger window. The I/O connection table can be opened using the same method as offline: either click the ‘cards’ icon or Project | I/O connection. Each module in the system has an equipment definition.
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