help on pointer

[harrydeharry]

I just want to set db2.dbx0.0 when q100.0 is on, just trying to learn pointer.
Please help what i m doing wrong.
thank for help.....
L 2
T #temp_o // int
OPN DB [#temp_o]
L 0
SLD 3
T #re //word
L DBB [#re]
LAR2
L QB 1000
LAR1
A [AR1,P#0.0]
= dbx[AR2,P#0.0]

 

[L D[AR2P#0.0]]

Here's the basics:

      L     2
      T     #temp_o
      OPN   DB [#temp_o]
      LAR2  P#DBX 0.0
      LAR1  P#Q 100.0
      A      [AR1,P#0.0]
      =      [AR2,P#0.0]

 

[harrydeharry]

thanks a lot

 

[harrydeharry]

hi...I m just learning the pointer I write the below line, the bit of dbb0 is turing on each blink of M1000.0,
I just want know is it write method or it can b written in a easy way, second thing using the #re (temp int) is correct here of should I use and MD.
Thanks in advance.

LAR1 P#M 1000.0
L 2
T #temp_o
OPN DB [#temp_o]
L #re
L 8
==D
JCN ll
L 0
T #re
ll: L P#DBX 0.0
L #re
+D
LAR2
A [AR1,P#0.6]
= [AR2,P#0.0]

A [AR1,P#0.6]
FN #pp
JCN out
L #re
L 1
+D
T #re
out: AN [AR1,P#0.6]
JCN lo
L 0
T DBB 0
lo: NOP 0

 

[SHKODRAN]

Where you are using this confusion of code?
On FB or FC ?
What should do exactly the variable "#re (temp int)"?

 

[L D[AR2P#0.0]]

He is using #re to count to 8 to turn on each bit of dbb0

temp variables should not be used to remember data between calls in FC/FB

re is a temp, what about pp?

Use an FB and use the stat area instead.

 

[harrydeharry]

pp is also a temp its a fc
but so far it is working well may be because its only one fc in simulator...
thanks..............

 

[SHKODRAN]

pp is also a temp its a fc
but so far it is working well may be because its only one fc in simulator...
thanks..............

You need to use an FB if you want to store data on stat variable!
Temp variable on FC at the next scan have not a signed value , or you can use a marker bool , word , dword directly etc...

This is an example of what you wanted to write:

                 L     2
                 T     #temp_o
                 OPN   DB [#temp_o]
                 LAR2  P#DBX 0.0
                 LAR1  P#M 1000.0
                 L     8
      Next:      T     #re
                 A      [AR1,P#0.0]
                 =      [AR2,P#0.0]
                 +AR1  P#0.1
                 +AR2  P#0.1
                 L     #re
                 LOOP  Next

 

[harrydeharry]

thanks for the help. I each time when m1000.0 blink the bits of dbb0 should blink one by one
M1000.0 DB2.dbb0
1 00000001
0 00000000
1 00000010
0 00000000
1 00000100
like this...