Steps are in error. No possible to restarts steps.
Hi,
I'm learning the Frellance so I'm working on Simulator and Demo version of Software. I'm the begginer. I have problem with SFC diagram. On the beggining(when the software is downloaded first time) all steps and transitions in sequence are in error and has 0 value(false(00.png)). When I start sequence everything is ok. When I achieve the end of sequence and restart the sequence, all steps still are in error but has value 1(true(01 and 02.png). This get me nervous, because my virtual plant is not working correctly. Seems I can run sequence properly only once. How to restart steps to false value like on the beggining and why steps are in error like on the pictures. Is this only Simulator problem or I did something wrong? I checked demo program is the same.
I'm learning the Frellance so I'm working on Simulator and Demo version of Software. I'm the begginer. I have problem with SFC diagram. On the beggining(when the software is downloaded first time) all steps and transitions in sequence are in error and has 0 value(false(00.png)). When I start sequence everything is ok. When I achieve the end of sequence and restart the sequence, all steps still are in error but has value 1(true(01 and 02.png). This get me nervous, because my virtual plant is not working correctly. Seems I can run sequence properly only once. How to restart steps to false value like on the beggining and why steps are in error like on the pictures. Is this only Simulator problem or I did something wrong? I checked demo program is the same.
Asked 3 months ago
Answers
0
Hello,
it's the normal behavior of the SFC.
I give you the advice, please read first the handbook.
That will clear all your questions.
it's the normal behavior of the SFC.
I give you the advice, please read first the handbook.
That will clear all your questions.
Answered 3 months ago
0
Your pictures do not show step states, but the value of the Variable POD_S3 which is fed by a binary constant function block. If this variable is only written by that function block, the value FALSE would be the initial value of the Variable as defined in the variable list and the value TRUE comes simply from operating the faceplate for the CSTBO function block. The initial value is valid only after downloading.
If your SFC depends on the value of POD_S3 = FALSE to start, it will not restart, because nobody changes the value back to FALSE.
This program might be executed inside a step or transition of your SFC but the variable does not represent the step state.
Step states are:active, inactive, was active and faulty and are color coded in the SFC display.
The error indication for POD_S3 might have to do with the fact that the variable you look at is in a process image ("@") which might not be valid if the SFC is not executed. Please note that all your pictures show a red line between the function block output and the variable. When this program is executed the line should be black and dotted for FALSE and Black and solid for TRUE. You obviously have looked at the program while the step was not executed.
What is actually not working in your virtual plant?
If your SFC depends on the value of POD_S3 = FALSE to start, it will not restart, because nobody changes the value back to FALSE.
This program might be executed inside a step or transition of your SFC but the variable does not represent the step state.
Step states are:active, inactive, was active and faulty and are color coded in the SFC display.
The error indication for POD_S3 might have to do with the fact that the variable you look at is in a process image ("@") which might not be valid if the SFC is not executed. Please note that all your pictures show a red line between the function block output and the variable. When this program is executed the line should be black and dotted for FALSE and Black and solid for TRUE. You obviously have looked at the program while the step was not executed.
What is actually not working in your virtual plant?
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