Hi

I must edit a program that witten by another programmer. He use any simatic timer by call FB.

there is not any used timer in "Assignment List" !

How do I know unused timers?

My CPU is S7-3152DP

Your timer is declared as local variable of your FB2 and it is stored in the instance DB4 and can not be listed in assignment table. It is not a "global" timer as Tx.

Regards.

Panov69

Your timer is declared as local variable of your FB2 and it is stored in the instance DB4 and can not be listed in assignment table. It is not a "global" timer as Tx.

Regards.

 It means I can use Timer No12 in another FB or FC?

Your description was excellent but I have to use Simatic timers!

Masoodes

Your description was excellent but I have to use Simatic timers!

In this case, I have not found my answer.

If the answer to my question is "not possible" then I should check and see what the whole program for timers have been used!

 hi,

the other Programmer didn´t use a "SIMATIC-Timer" or HW-Timer. He used Software-Timer, by SFB4/5 IEC-Timer.

These Timers don´t waste the CPU-Timers T0-Txxx. 

So I guess you can use the T12 as you want.

hope this helps,

regards,

Hello Masoodes

I fear you discovered an undocumented feature of TIA Portal.

If you declare an FC or FB Parameter of type TIMER, you MUST assign a Timer as the actual Parameter for the Block call (e.g. T 12).

In your screendumps though, only an Integer number of "12" is used as the actual Parameter!

"Classic" Step 7 (V5.x) will NOT allow this and would highlight it red as it expects a proper Timer number (e.g. T 12).

TIA Portal Step 7 though seems to happily accept a simple Integer number instead (e.g 12), even though TIA Portal help also clearly states that "the actual Parameter must be a Timer, example T 1".  

I can't say if your program works correctly right now, but if I were you I would fix up all FC/FB calls that have Parameters of type "TIMER" and assign a proper "T" number as the actual Parameter (and your X-Ref will work correctly too then).

I hope this helps