Hello I have below problem,

I have created program where I use for example three valves (outputs).

I created function bloc where I wrote a program. 

In first step I want to open valve number 1 and 2 

In second step I want to open valve number 2 and 3

In third step I want to open valve number 1 and 2 

I have moved fuction block to OB and add particular output addreses to the oututs  

My probelm is that when the program starts I see in OB that only addreses (outpus) used in last network are reacting. Despite that in function block it looks taht network is working and change valuse, in OB block there are no reactions for valuse used few times. There is reaction for valuse used for one time or for value used in last network in FB.

I hope I described problem clearly. 

Leszek Jaszczak

Hello I have below problem,

I have created program where I use for example three valves (outputs).

I created function bloc where I wrote a program. 

In first step I want to open valve number 1 and 2 

In second step I want to open valve number 2 and 3

In third step I want to open valve number 1 and 2 

I have moved fuction block to OB and add particular output addreses to the oututs  

My probelm is that when the program starts I see in OB that only addreses (outpus) used in last network are reacting. Despite that in function block it looks taht network is working and change valuse, in OB block there are no reactions for valuse used few times. There is reaction for valuse used for one time or for value used in last network in FB.

I hope I described problem clearly. 

 Hi Leszek Jaszczak,

Please attached Pdf file for Function Block.

It seems Output variable which is declared in Function Block declaration part is used for multiple coils.

You can use multiple Set/Reset for Output variable,but coil assignment is done only one time.If you use multiple coils for same output then malfunction will occur.

You can write logic like (This is not proper SCL Code).

If step 1 then Set Valve 1 and 2 and reset Valve 3

If step 2 then Set Valve 2 and 3 and reset Valve 1

If step 3 then Set Valve 1 and 2 and reset Valve 0

Also keep in mind that if you have used multiple legacy/IEC timer in program then you need to assign different timer/DB instance for each timer call. 

Br,

AmolG.

Hello,

It is difficult to guess what the issue is with the information you provide such is stated earlier.

There is something that come up regularly in the Forum that may be your problem too. I will show the bad vs okay in a picture.

hello AmolG

please find pdf on my fb in attachemnt.

Looking foreward for help.

Leszek Jaszczak

hello AmolG

please find pdf on my fb in attachemnt.

Looking foreward for help.

Hello.

Your problem is as I expected and showed in the above picture.

Your situation is now

Network 1
          bottom_tank_valve
|--...........-( )--.....


Network 2
        bottom_tank_valve
|--...........-( )--.....

The quickest solution is to use unique temporary bits where you are coiling the output more than once. (you do this for all the outputs that are coiled twice)

Network 1
|         tempBottomValve1
|--...........-( )--.....


Network 2
|         tempBottomValve2
|--...........-( )--.....

Network 6: Temp -> Out
|  tempBottomValve1   bottom_tank_valve
|---------| |---------|----( )
|                     |
|  tempBottomValve2   |
|---------| |---------|

Helpful?

Leszek Jaszczak

hello AmolG

please find pdf on my fb in attachemnt.

Looking foreward for help.

 Hi Leszek Jaszczak,

1.You have used multiple coils for same address which is not allowed as it will create malfunction.

2.There is no any condition consider to jump from step 1 to step 2.

3.There is no set point consider for timer it is T#0s.You need to take care for the same.If you want use timers then you need to use some non zero time set point.

Please find attached sample program for your reference may be it will helpful to you.

Br,

AmolG.

AmolG

 

Leszek Jaszczak

hello AmolG

please find pdf on my fb in attachemnt.

Looking foreward for help.

 Hi Leszek Jaszczak,

1.You have used multiple coils for same address which is not allowed as it will create malfunction.

2.There is no any condition consider to jump from step 1 to step 2.

3.There is no set point consider for timer it is T#0s.You need to take care for the same.If you want use timers then you need to use some non zero time set point.

Please find attached sample program for your reference may be it will helpful to you.

Br,

AmolG.

 AmolG thank you for advices, you program looks beautifull,

I am studying it.

I do not understan everything but I think in a few days I will come back with questions.

Regarding your points:

1.You have used multiple coils for same address which is not allowed as it will create malfunction.

ad.1 yes - this was main mistake

2.There is no any condition consider to jump from step 1 to step 2.

ad.2 there are conditions in a form of bits (coils) - please see attachment

3.There is no set point consider for timer it is T#0s.You need to take care for the same.If you want use timers then you need to use some non zero time set point.

ad.3 there are set points for timers- I have moved them and fulfill in a OB 

Leszek Jaszczak

 

AmolG

 

Leszek Jaszczak

hello AmolG

please find pdf on my fb in attachemnt.

Looking foreward for help.

 Hi Leszek Jaszczak,

1.You have used multiple coils for same address which is not allowed as it will create malfunction.

2.There is no any condition consider to jump from step 1 to step 2.

3.There is no set point consider for timer it is T#0s.You need to take care for the same.If you want use timers then you need to use some non zero time set point.

Please find attached sample program for your reference may be it will helpful to you.

Br,

AmolG.

 AmolG thank you for advices, you program looks beautifull,

I am studying it.

I do not understan everything but I think in a few days I will come back with questions.

Regarding your points:

1.You have used multiple coils for same address which is not allowed as it will create malfunction.

ad.1 yes - this was main mistake

2.There is no any condition consider to jump from step 1 to step 2.

ad.2 there are conditions in a form of bits (coils) - please see attachment

3.There is no set point consider for timer it is T#0s.You need to take care for the same.If you want use timers then you need to use some non zero time set point.

ad.3 there are set points for timers- I have moved them and fulfill in a OB 

Regular practice will make you perfect.

Still there are some point which will you improve day by day.

Br,

AmolG.