Experimental Physics and
Industrial Control System

Wang Xiaoqiang <[email protected]> · Wed, 31 Jan 2018 14:47:09 +0100

Hi,

I actually use this 'bug' to selectively mask out certain parts of the

database.

In the following example, if HS='#', the sequence selects "jog to

limit". Otherwise, it "jog to home switch". Without this trick, I would

need to create another record for this selection.

record(sseq, "INITSEQ")
{
...

    field (DOL2, "1")
    field (WAIT2,"Wait")
    field (LNK2, "TOLIMIT.PROC CA") # Jog to limit
$(HS)    field (LNK2, "TOHS.PROC CA") # Jog to home switch
....
}

If the 'bug' is useful, it probably becomes a feature.

Best
Xiaoqiang

On 01/31/2018 10:28 AM, Amien Crombie wrote:

Hi

I inadvertently stumbled upon this strange 'bug' in my ioc.db file

I had the following record:

record(subArray,    "$(uid):attenuator")
     {
             field(INP,        "$(uid):raw")
             field(NELM,        "9")
             field(MALM,        "9")
             field(INDX,        "9")
             field(FTVL,        "LONG")
          #   field(FLNK,        "$(dd):getX")

      }

Now the field '*FLNK*' is commented out and I have deleted my macro

$(dd) in my substitution file.

When I run my IOC, I get the following warning

/macLib: macro dd is undefined (expanding string #    field(FLNK, "$(dd)")/

/Warning: 'db/dbExample1.db' line 16 has undefined macros/

So the comment (#) still evaluates the macro, even if the documentation

says it ignores the whole line. Of course if the macro exist it runs

without the warning.

Not a critical issue but can be misleading.

Thanks

Amien

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System