Experimental Physics and
Industrial Control System

Ned Arnold <[email protected]> · Fri, 30 Sep 2005 08:10:07 -0500

Andrei,
The ASL is *not* a field in the record. It is an attribute defined for
each field in a record type in the xxxRecord.dbd file. For example
field(VAL,DBF_ENUM) {
		prompt("Current Value")
		promptgroup(GUI_INPUTS)
		pp(TRUE)
		asl(ASL0)
	}
Fields that are routinely changed by operators get assigned ASL0, more
sensitive fields get assigned ASL1 (the default).
To change the ASL level of a field will require a new record type, i.e.
  Andrei'sAIrecord
  Andrei'sBIrecord

I have been in enough conversations about this to know that everyone has
there own opinion as to the effectiveness of this approach, so you won't
be saying anything new, Andrei.
 Ned

Liyu, Andrei wrote:

Hi,
I am working with Channel Access Security and read manuals again :(
Maybe I am mistaken but I couldn't find enough information about ASL
field.
Channel Access Security is based on ASG and ASL record's fields. So
Application Developer's Guide; 8.3.3 Definitions "... ASG ... ASL ..."
1. But Records Reference manual hasn't any information about ASL.
2. Also link between ASL and <level> in Application Developer's Guide;
8.3.4.2 and 8.3.4.3 is not clear.
Of course, struct dbFldDes in dbBase.h has
asLevel as_level; /*access security level

*/
Have a good day, Andrei.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System