WinCC Professional V13 SP1 – Simple Sample: Discrete Alarm PLC Acknowledgment

“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:

Many applications demands that an alarm would be acknowledge by the PLC or that the PLC receive a status if a message was acknowledged.

In this sample project, an alarm (“Alarm 0 active”) could be acknowledged by setting a variable and its status (acknowledged) could be monitored in other variables.

Requirements:

WinCC Professional V13 SP1.

Project with a minimum configuration (stop - See references “WinCC Professional V13 SP1 – Simple Sample: Discrete Alarm”https://support.industry.siemens.com/tf/br/en/posts/135058/).

Principle:

1 – Alarms are defined from Word / DWord variables (trigger variable)

2 – An additional Word / DWord can be set as acknowledge functions (i.e. setting this bits, the PLC sends a command to acknowledge the Alarm in HMI). (Alarm properties → acknowledgment → PLC → Tag/bit)

3 – At same way, other Word / DWord variables bit could be used to send a feedback to the PLC that a alarm would be acknowledged (Alarm properties → status → setting → Tag/bit)

Configuration main steps:

PLC acknowledges a alarm

• Create a new tag (Name = “HMI_Tag_2”, Data type = “Uint”)

• Set alarm properties (HMI Alarms → Select the alarm → Properties → Acknowledgment → HMI: Name = “HMI_Tag_2”, Bit = 0)

PLC becomes a feedback of an acknowledged a alarm

• Create a new tag (Name = “HMI_Tag_3”, Data type = “Uint”)

• Set alarm properties (HMI Alarms → Select the alarm → Properties → Status → Setting: Name = “HMI_Tag_3”, Bit = 0)

References:

Manual

WinCC Professional V13.0

https://support.industry.siemens.com/cs/br/pt/view/92323076/en

Online helps system

WinCC Professional V13.0 SP1

https://support.industry.siemens.com/cs/br/pt/view/109096785/en

FAQ

Which VBS information and VBS programming tools are there in WinCC (TIA Portal)?

https://support.industry.siemens.com/cs/br/pt/view/59885894/en

Tips and tricks for creating scripts in WinCC (TIA Portal)

https://support.industry.siemens.com/cs/br/pt/view/57132412/en

How do you acknowledge alarm messages in WinCC Runtime Professional V11 onwards?

https://support.industry.siemens.com/cs/br/pt/view/55622122/en

Project:

project.zip