S7 Move Block question

[snydl0ga]

I have the need to clear multiple registers all at once. Typically I use a Fill command and fill them all with 0. I can not seem to find a similar function in the S7 318 logic.

Anyone have any ideas or am I overlooking a function? I was going to use the BlockMove but it does not accept 1 value of zero for multiple destinations. And the Fill function seemed to fill destinations with values from another block of registers instead of one constant.

For example: I want to clear or reset registers DB100.DBW100 through DB100.DBW110.

Lance Snyder

 

[jacekd]

Use SFC21 FILL. First initialize some memory area with desired value then use FILL with this area as input BVAL.
Other solution is as always DIY:
OPN DB 100 //target DB
LAR1 P#DBX 100.0 //start of target area
L 0 //init val
L 12 //number of bytes to init
fill: TAK
T DBB [AR1,P#0.0]
+AR1 P#1.0
TAK
LOOP fill


jacek


Regards,

Jacek

Do it right or don't do it at all.

 

[snydl0ga]

Good advice! thanks

 

[JLin]

Or you can also just do the following:

L 0
T DB100.DBW100
T DB100.DBW102
and so on...

 

[jacekd]

Briliant idea JLin, you should have tried it for 10 kB datablock.

Regards,

Jacek

Do it right or don't do it at all.

 

[comandeng]

Hallo try this


L 0
T "0_WERT" (MW0)
NOP 0

CALL "FILL"
BVAL :="0_WERT" (MW0)
RET_VAL:=MW4080
BLK :=P#DB100.DBX 200.0 WORD 10

You need to go over a variable MW and then it will work.

I had once the same problem

Regards Urs