WinCC V7.3 – Simple Sample: calling a script by time interval

“Simple Samples” are small projects that demonstrate simple features. The target is give a quick overview about the theme and be used as start point for related discussions. Follow there are a short description and the configuration main steps.

Description:

On each 2 seconds time interval a script is called. In this example the script increment a TAG.

Note: depending of the context (e.g. number of script running in parallel, time interval, logic complexity, etc.), scripting calling by time could overload the PC processing. Many times there is better way to solve the same problem like, for example, scripting called by tag changes (WinCC V7.3 – Simple Sample: calling a script by a tag change ) 

Requirements:

WinCC V7.3.

Project with a minimum configuration (stop button, tags, etc.).

Configuration main steps:

• Create a project.

• Activate Global Script Runtime (WinCC Explorer → Project → Computer → Properties → Properties → Stratup)

• Create two tags (“HMI_Tag_5” as “Signed 16-bit value” - WinCC Explorer → Tag Management)

• Create a Action (WinCC Explorer → Global Script → VBS Editor → Open → File → New → Action)

• Create a script as follow:

Option Explicit

Function action

Dim aaa

Set aaa = HMIRuntime.Tags("HMI_Tag_5")

aaa.Read

aaa.Value = aaa.Value + 1

aaa.Write

End Function

• Configure the action's trigger by time (Menu → Tools → info / trigger → tab trigger → select Timer / Ciclic → Add → set: Name = “MyTrigger2s”;  Event = Standard cycle, time = 2s)

• Create a Picture

• Insert a I/O Field (Smart Objects).

• Link the I/O Field with “HMI_Tag_5” (Right mouse click → Configuration Dialog → Tag = “HMI_Tag_5”)

Thanks:

Thanks to the Siemens United States Technical Support (in special Mr. David Crockett) for the Help with this TIP.

References:

Portal

SIMATIC WinCC in Online Support

https://support.industry.siemens.com/cs/br/pt/view/93906404/en

Manual

WinCC V7.3: Working with WinCC

https://support.industry.siemens.com/cs/ww/en/view/102754925

WinCC V7.3 Scripting: VBS, ANSI-C, VBA

https://support.industry.siemens.com/cs/ww/en/view/102777678

Application and tools

Demo projects for SIMATIC WinCC V7.3

https://support.industry.siemens.com/cs/br/pt/view/93148272/en

Example Blocks for WinCC V7 and STEP 7 V5 (for S7-300 with SCL and S7-400 with CFC, SCL)

https://support.industry.siemens.com/cs/br/pt/view/68679830/en

Example blocks for WinCC V7 and STEP 7 (TIA Portal) (for S7-1200 and S7-1500 in SCL)

https://support.industry.siemens.com/cs/br/pt/view/31624179/en

Project:

Due a size / format restrictions, the project are first compacted with 7z format (project.z7) and after that attached to a zip archive (data.zip).