×
Siemens Industry Online Support
Siemens AG
Entry type: FAQ, Entry ID: 6516034, Entry date: 06/17/2010
(0)
Rate

Why do I get the signal "QBAD" on my "CH_AI" driver block?

  • Entry
  • Associated product(s)

Description
When I set "TC-IL" (thermo-element, internal linearization) as measuring type for the relevant analog input module, a "QBAD" signal is display on the driver block "CH_AI".
This measuring type is supported only with Hotfix 2 for PCS 7 V5.0 + SP2. You can order this hotfix free of charge in Entry ID 5934475.

Install the hotfix and copy the function FC275 manually into your program from the block library. This replaces the older driver (update date 16.11.1999) with the new driver (update date 16.10.2000). The measuring type "TC-IL" then functions with this new driver.

Warning:
Since you have to copy the driver manually into the project, the drive update is only valid for the current project. You have to repeat the copying of function FC275 for new or other projects.

Keywords:
I/O access, Channel driver


Security information
In order to protect plants, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about industrial security, please visit
http://www.siemens.com/industrialsecurity.