Issue in reading the variable's value

[Soundarya]

Hi Team,
1. Generally with zenon VSTA code, I will be reading the value of the variable and moving it to the text document. The issue is that at sometimes instead of getting the variable value,I am getting the variable name or sometimes variable's identification.
2.Suddenly some of the variables were not communicating properly i.e., I was not able to read the value of the variable in the VSTA code, I was getting error and when I restarted the SCADA, I was able to read the value of that variable.
ZENON VERSION: 7.60 SP 0 Build 36068

Regards,
Soundarya.

[felixst]

Dear Soundarya,

are you using an OnlineContainer to ensure that the variables have a proper value?

Regards,
Felix

[Soundarya]

Dear Soundarya,

are you using an OnlineContainer to ensure that the variables have a proper value?

Regards,
Felix

Hello Felix,

Thanks for considering my post.

I am not using onlinecontainer in my code. 

The code I have used is,
Dim Internal_Values as string="Z_Datalog_int[1]"

 Values = Me.Variables.Item(Internal_Values).get_Value(0).To String().Trim

objWriter.Write(Values)

objWriter.WriteLine()

In this code ,
Z_Datalog_int[1] is a PLC Variable, I am just get reading the value of the variable and writing it in a text document.
Sometimes, Instead getting the value in document , I am getting the variable name  as "Z_Datalog_int[1]" and sometimes its identification.

Kindly help me in resolving this issue.

Thanks and regards,
Soundarya.

[felixst]

Dear Soundarya,

please check if the variable is online before using it.
You can find various examples here in the forums. For a detailed information you could consume our (online) trainings around this topic. Please contact your sales representative to clarify options here.

Some links that might help:

https://forum.copadata.com/showthrea...ight=container

https://forum.copadata.com/showthrea...ight=container

Regards,
Felix

[Kazuan]

Hello,
i don't want to create new topic, so i explain my problem here.

I try to do simple if statement depend of value form bool variable, but i have no idea how to read the value of variable. This variable is online, i use online cointainer. I can set this value by using method set_value, but get_value doesn't work, or i do something wrong. Can you help me with this problem? How to correctly get value from this variable?


"OTWORZ" is Bool variable created in Runtime.

Source code:
https://pastebin.pl/view/482a32f1

[Soundarya]

Hi,
  And also while checking whether the variable is online as mentioned in above suggestions, sometimes it gives the reply as variable is online even if PLC is disconnected and reads the old retained value of the PLC variable.

  How to resolve this.