Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Tue, 28 Sep 2010 16:30:58 -0400

 When playing database golf:

In a calcout record, you can assign intermediate results to fields
inside CALC, and then use OCAL to continue your calculation. (So you get
>70 characters to do your math.)

Removing "unnecessary" brackets and spaces also obfuscates things
nicely. (And saves space.)
Hole in one!
Ralph

On 28.09.2010 16:20, Ned Arnold wrote:

Andrew -
It is not uncommon to break the expression up between multiple calc records to work around the length limitation. You can put those floating point constants in spare inputs ... and then have a second calc that returns "(235>B&& 5>D&& 5>E)" to another input ... and I think you will fit.
 Ned

On Sep 28, 2010, at 3:11 PM, Mark Rivers wrote:
I suspect your CALC expression is longer than 40 characters and that is
the source of the error.
Mark

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Andrew Wagner
Sent: Tuesday, September 28, 2010 3:04 PM
To: [email protected]
Subject: CALC expression
Hey everyone,
I need to evaluate a somewhat complicated conditional statement in a
calc record. Presently I need to evaluate:
field(CALC, "(235>B&&  5>D&&  5>E) ? (B*0.00835 - 0.7>  A + (C-B)*0.25
? B*0.00835 - 0.7: A + (C-B)*0.25): 0")
where the letters are input variables. When I load the record I get the
error
Can't set "VOLT:PID.CALC" to "(235>B&&  5>D&&  5>E) ? (B*0.00835 - 0.7>
A + (C-B)*0.25 ? B*0.00835 - 0.7: A + (C-B)*0.25): 0"
Error at or before ")" in file "MagnetCtrlApp/Db/MagnetCtrl.db" line 113
Does CALC not support nested evaluations? Perhaps I need a subroutine
record? Any advice would be greatly appreciated.
Cheers,
Andrew

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System