start the sequence from middle steps on S7_Graph

Dear all experts.

i'm making a software to control a robot with too many steps. in auto mode i call a made s7-graph FB and the sequence will continue. if in middle steps occur a fault like 'drive alarm' or operator change the control mode from auto to manual, sequence will stop for example on step no.23.

so i want to know, how can i return to the last step after removing the alarm or back to auto mode?

best regards.

Hello Shahab_6448015,

perhaps the following information will help you. The sequencer switches to the next step as soon as the conditions in the transition are fulfilled again. Or you can use the initial step to return to the beginning of the sequencer. You can also define the initial step in the middle of the step chain.

You can also program queries from the instance DB in the structure of the transition. These are the parameters TV, TT and TS. An example can be found in the FAQ:

What tips and tricks are there for executing and monitoring steps and transitions in S7-GRAPH V5?
https://support.industry.siemens.com/cs/ww/en/view/1668619

With best regards
Cicero

Shahab_6448015

Dear all experts.

i'm making a software to control a robot with too many steps. in auto mode i call a made s7-graph FB and the sequence will continue. if in middle steps occur a fault like 'drive alarm' or operator change the control mode from auto to manual, sequence will stop for example on step no.23.

so i want to know, how can i return to the last step after removing the alarm or back to auto mode?

best regards.

 

•  if, for example, "drive alarm" occured, your program flow shouldn't go from the latter step. After the issue is eliminated, your program flow continues from the latter step.
• if your so-called "robot" was turned in to "manual" mode for some reasons you should ensure that the main program flow won't leave the latter step. If operator performed some movements in "manual" mode, further the program flow in "auto" must begin from so called "home position".
• Also you can define so-called "semi-auto" mode where you can define alternative branches as follows: e.g. "go to step 20"; "go to step 21"; "go to step 22". For example, your arm or tool or whatever is in "home posiiton", then you says go to  "Step 23".
  

HBCM_

 

Shahab_6448015

Dear all experts.

i'm making a software to control a robot with too many steps. in auto mode i call a made s7-graph FB and the sequence will continue. if in middle steps occur a fault like 'drive alarm' or operator change the control mode from auto to manual, sequence will stop for example on step no.23.

so i want to know, how can i return to the last step after removing the alarm or back to auto mode?

best regards.

 

•  if, for example, "drive alarm" occured, your program flow shouldn't go from the latter step. After the issue is eliminated, your program flow continues from the latter step.
• if your so-called "robot" was turned in to "manual" mode for some reasons you should ensure that the main program flow won't leave the latter step. If operator performed some movements in "manual" mode, further the program flow in "auto" must begin from so called "home position".
• Also you can define so-called "semi-auto" mode where you can define alternative branches as follows: e.g. "go to step 20"; "go to step 21"; "go to step 22". For example, your arm or tool or whatever is in "home posiiton", then you says go to  "Step 23".
  

hope this helps

 thank you so much, i found the solution from your comments.

thanks