Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Fri, 02 Nov 2007 23:16:28 +0100

Probably only true if you want to do that scan rate change in a running
system.
Generally: As soon as the hardware allows different scan rates, I would
always make the appropriate SCAN fields a macro that gets substituted
when blowing up the template database:

If you put one input plus the attached calc into a template DB file and
set both SCAN field to $(channel_scan), you can instantiate an arbitrary
number of those per-channel structures, specifying the scan period of
each of them (channel_scan=".2 second") to whatever seems appropriate.
Ralph

Rodney R. Porter wrote:

One disadvantage of this method is that if you ever want to change the scan

rate, the change needs to be coordinated between different records. Having

a process chain with only 1 record setting the scan rate makes it easier if

you ever foresee someone else wanting to change the scan rate.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System