Local data in STEP7 V 5.6

Hi experts ,

What are these L2.0 L2.1 L3.0 L3.1

these are neither input outputs in the block neither in static area .. which bits are these 

That' s local data bits.

Use the help function of STEP7 with the key word local data....

If my understanding is correct than it seems the programmer is accessing the individual bits of the #tempStatusword which is Word 4.0 (byte 4 and byte 5) so he is accessing individual bits from the byte 5 by using L5.0 to L5.5

qwemx

If my understanding is correct than it seems the programmer is accessing the individual bits of the #tempStatusword which is Word 4.0 (byte 4 and byte 5) so he is accessing individual bits from the byte 5 by using L5.0 to L5.5

There is no Word 4.0, only a word 4.

Bits = Lx.y
Bytes = LBx
Words = LWx
Double Words = LDx

ixo65

 

qwemx

If my understanding is correct than it seems the programmer is accessing the individual bits of the #tempStatusword which is Word 4.0 (byte 4 and byte 5) so he is accessing individual bits from the byte 5 by using L5.0 to L5.5

There is no Word 4.0, only a word 4.

Bits = Lx.y
Bytes = LBx
Words = LWx
Double Words = LDx

 this way of use of local will only work when inside "temp" of the block   

if my word was not inside temp then could not use it 

ixo65

You can compare it with flags (M).
M flags are global, L flags are temporary.

 i will not prefer this - seems to be a bit susceptible to loss of information

 If you use too many nesting levels when executing your blocks, the L stack can overflow. S7 CPUs change to STOP mode if the permitted L stack size for a program is exceeded.

Is like with all temporary variables.

But if you work with these variables within a block and pay attention to the obstacles, this is not a problem.