Sequencer issue

Where in STEP 7 (TIA Portal) V11 is there a program for the S7-1200 that lets different bit patterns rotate or flash under time control?

You can play around with the patterns until you develop one that suits your application.

Hope this helps,
Daniel Chartier

how we can use the DRUM sequencer FB85?

any one can help?

scadaexpert 

Hello expert;

With what PLC, and which programming software (and version)?

Step 7 v14 offers a Drum sequencer that can be setup in a S7-1500, look at the extract from the s7 Basic V14 manual below.

Hope this helps,

Daniel Chartier

Hi

Clearest way is to use integer step counter [pseudocode]:

NW1:
if (Sequence_Start_Pulse) {
    Sequence_Step=10;
    Reset_All_Outputs;
}

NW2:
if (Sequence_Step==10) {
    Set_Output_1;
    if (Transition_Condition) Seqience_Step=20;
}

NW3:
if (Sequence_Step==20) {
Reset_Output_1;
Set_Output_2;
if (Transition_Condition) Seqience_Step=30;
}
....

Steps are spaced by 10 so any additional steps could be inserted when required.

I did my own theme park with blackjack and hookers sequencer multi FB for s7-12xx series plc at LAD only. If you want, you can translate it to SCL for s7-12xx series plc, or to STL for s7-15xx series plc. It will be interesting to see new version of my logics.

It is 32 steps sequencer with possibility of switching between 16 steps and 32 steps mode for faster work. Meanwhile it works fast enough. So it has 32 starting conditions (you can use this conditions for checking before the new cycle starting, using SCok (starting conditions are ok) output variable). It has also 32 permanent conditions (to prevent emergency situation during cycle). If permanent conditions are not ok (PCok=0), sequencer will go to the step 8.

Step 1 - is for initialize and prepare for working (it possible do this step after fault acknowledge or auto\manual mode switching).

Step 2 - is for semiauto or pre-auto mode.

Step 3 - is for activated auto mode.

Step 4 - wait starting (missing other user conditions)

Step 5 - manual mode is activated.

Step 6 - sequencer timeout (if input time reference is zero - step is always deactivated), for control max cycle time.

Step 7 - custom conditions missing

Step 8 - permanent conditions missing

Step 9 - emergency stop relay signals missing

Step 10 - starting conditions OK checking

Step 11...Step 32 - working steps

Enjoy!!! 

P.s. example project is for TIA 13 sp1 upd8.

P.p.s. Variables Step_stat_bool is overlaying "AT "step_stat" " and TArray is overlaying "AT "TMatrixDW" " for using the same memory space. I don't know why, but this information is not available in printed version of block.

Hello PlcPunk,

I am converting a SQO function from Rockwell RSLogix 5 Pro to a Siemens S7-1200 using TIA Portal v13. I am not sure if you are familiar with Rockwell, but in my program it is using the SQO function to sequence a file of integers through a mask, to a destination. Is it possible for me to translate that into your 32 step sequencer even though it requires an input of “Array[1..32] of Bool”? How would I have to modify your program to fit those parameters?

Also, could you share with me what the actual inputs/outputs do in your Sequencer_32 [FB100] function block? I am very new to ladder programming and programming as a whole and that would help me immensely.

Thank you,

Hi, man!

I didn't worked with Allen Bradley plcs in RSLogix, but i think that Rockwell sqo is not the same as scl\stl language in siemens plc. The main idea of my sequencer next: each step of sequence is triggered by positive edge of input step conditions, so we need this conditions for step trigger only once. Also i check general starting and permanent conditions for step sequence cycle processing. Every input\output variable in block has own comments.

You can ask me if something will be unclear in comments.

 Hi Wharton,

I am also now converting a SQO function from RsLogix using TIA v12. Did you ever manage to successfully convert this?

Thanks,

Daniel

Wharton

Hello PlcPunk,

I am converting a SQO function from Rockwell RSLogix 5 Pro to a Siemens S7-1200 using TIA Portal v13. I am not sure if you are familiar with Rockwell, but in my program it is using the SQO function to sequence a file of integers through a mask, to a destination. Is it possible for me to translate that into your 32 step sequencer even though it requires an input of “Array[1..32] of Bool”? How would I have to modify your program to fit those parameters?

Also, could you share with me what the actual inputs/outputs do in your Sequencer_32 [FB100] function block? I am very new to ladder programming and programming as a whole and that would help me immensely.

Thank you,