Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Fri, 27 Mar 2015 15:49:08 +0100

Hi Bernardo,

You can use an additional ao record to forward a value from one record

to another record's field.

If e.g. the ai "S7low" has the LOW threshold from your alarm poll group,

and the ai "S7val" has the matching value, you can add:

record(ao, "S7low_fwd") {
  field(OMSL, "closed_loop")
  field(DOL, "S7low CP")
  field(OUT, "S7val.LOW")
}

That would push the value of "S7low" into the LOW field of "S7val"

whenever "S7low" changes.

~Ralph

On 27/03/2015 13:17, Bernardo Carvalho wrote:

Dear All,

I'm using EPICS with a s7-1200 PLC from Siemens that uses separate

"tags" for values and alarms that are transferred periodically

to the IOC (using s7nodave and "Poll Groups").

Is it possible to use a FLNK link to change Alarm related fields

(HIHI, HIGH, LOW, and LOLO ) on a "ai" PV?

Should I use subroutines or any other method?

Thanks in advance
-Bernardo

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System