Program_alarm acknowledgement by PLC

Hi,

I'm using the block "Program_alarm" to display alarms in HMI and the block "Get_AlarmState" to know the state of the alarm.

The acknowledgment works with the HMI button but it is possible to acknowledge a "Program_alarm" by the PLC?

Thanks

Best regard

Hi,

Thanks for your answer. Your link is a example for acknowledgement of discrete alarm. My question is about acknowledgement of controller alarm.

How can I acknowledge this alarm by PLC? see attached file.

Thanks

Siemens tourist

Hi,

Thanks for your answer. Your link is a example for acknowledgement of discrete alarm. My question is about acknowledgement of controller alarm.

How can I acknowledge this alarm by PLC? see attached file.

Thanks

 Hi, 

Have a look at this   "S7-1500, ET 200MP, ET 200SP,ET 200AL Diagnostics" manual under chapter 4.1 Configuring alarms for system diagnostics.

In point 6  you can read:

"In the settings, specify the alarm category that is to be displayed and if it needs to be

acknowledged.

The check boxes in the "Alarm" column are enabled by default. When you disable all

check boxes, the status of the HMI system diagnostics view is still updated with the "Info

Report" functionality."

Hi Microman,

Thanks for you help.

In the setting I can only specify the alarm category for system alarm. My question is about the Program alarms not System alarms. See the difference  in the attached file.

Siemens tourist

Hi Microman,

Thanks for you help.

In the setting I can only specify the alarm category for system alarm. My question is about the Program alarms not System alarms. See the difference  in the attached file.

 Hi, 

In manual https://support.industry.siemens.com/cs/us/en/view/68074843 under page 1026:

You define the acknowledgment model for an alarm class. Alarms that are assigned to this

alarm class will be acknowledged on the basis of this acknowledgment model. The following

acknowledgment model is used in WinCC:

● Alarm without acknowledgment

This alarm comes and goes without having to be acknowledged. There is no visible

response from the system.

● Alarm with simple acknowledgment

This alarm must be acknowledged as soon as the event that triggers the alarm occurs. The

alarm remains pending until it is acknowledged.

So what you need to do is organize the alarm messages you do not want acknowledge into a specific message class, set up this message class like "Alarm without acknowledgment" and that should be it.

Cheers

Hi Microman,

Thanks again for your help.

You suggest that remove the acknowledgment for these alarms. But I want a acknowledgment for these alarms. The acknowledgment by WinCC works fine. But I need a acknowledgment by PLC because sometimes the acknowledgment is by a H/W button or another HMI.

Siemens tourist

Hi Microman,

 

Thanks again for your help.

 

You suggest that remove the acknowledgment for these alarms. But I want a acknowledgment for these alarms. The acknowledgment by WinCC works fine. But I need a acknowledgment by PLC because sometimes the acknowledgment is by a H/W button or another HMI.

 Hi,

Beauty of the forum! Misunderstand each other! No problem!

So same manual as last time page 1331 "Acknowledgment by the PLC":

https://support.industry.siemens.com/cs/us/en/view/68074843

If this time I answered your question, please rate my answer! If I misunderstand you again, please ask again!

Have a good one!

Hi Microman,

Sorry to insist. Your answer is about acknowledgment by PLC of "discrete alarms". This part works perfectly in my project, acknowledgment by PLC or by HMI (See attached file first part).

How can I do the same for "controller alarms"? (attached file second part). Where is the "PLC acknowledgment tag" for "controller alarms"?

Remember these alarms (Discordance R200 V01 and Discordance R200 V02) are user alarms generated in "controller alarms" by the block "program_alarm".

I think we are close of the solution....

Hi,

OK. I see. The "STEP 7 Professional V13.0 System Manual, 02/2014" Manual write under chapter "9.5.4 Available alarm blocks" on page 3050:

"The following alarm block is available:
● Program_Alarm
The selection of the corresponding alarm class determines whether the block requires
acknowledgment or not. The default setting is that the block does not require
acknowledgement."

So If you choose the alarm class resetable you can reset the message, maybe the predefined alarm classes do not cover your requirements. So maybe you need to look at Custom Alarm Classes. Have a look at  "WinCC Basic V12.0 System Manual, 01/2013 manual" under chapter "9.3.1.4 Alarm classes" On page 1024:

"Custom alarm classes
You can create new alarm classes under "HMI alarms > Alarm classes", configure how you
want the alarms to be displayed, and define an acknowledgment model for alarms of this
alarm class. The possible number of custom alarm classes depends on which runtime is
used in your project."

So that is a bit difficult way around, but I hope it will works for you!