Applies To:
  • CitectSCADA 5.xx, 6.xx
  • CitectHMI 5.xx, 6.xx
Summary:
Deleted variable tag records can cause read and write request mismatch for some drivers.

Drivers which use the %N, %N+ and %R tag template operators may read or write to the wrong tag for tags after the deleted record.

Drivers with this potential issue are :

AbbMod300
ABLogix
APACS
BnRPVI
Ddedrv (using old non oid version)
Melscqna
Measurex
Modnetibm
OpenCtrlOPC (using old non oid version)
Optomist
Teleperm
Tons
 

Solution:
Ensure projects and included projects are packed before the compile, and all servers and clients are updated in a similar manner at the same time.
NB: This is only needed IF records have been deleted.

A utility to pack projects with large number of included projects can be found on the Citect Web site under MyCitect -> Downloads -> ToolBox -> Database Tools.
 
Keywords:
drivers deleted tags  

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