Who knows where are the alarm messages ?

[Silvano]

I have just installed LVDSC7.
I have realized that the "alarm viewer" doesn't visualize the alarm message anymore in the field description. The message that I have written with the TCE (Tag Configurator Editor) in the field "Alarm Message" of the file scf. The only description that appears is "DISCRETE". When an alarm is activated there is not a message that the cause of the alarm describes to the operator !
Already from the version 6 have been made changes to the management of the messages for the alarms and the events. With the BridgeView 2.1 were possible to configure an input TAG of event, when the input was activated it appeared in the list of the events with a green message. The message was taken by the field "alarm
message" even if the TAG was not enabeled to produce alarms. This was a very useful possibility because the inputs does' not have always to produce alarms. Some input TAGs signal variations events of monitored process. That events aren't alarms but need a message to inform the operator of the event. In LVDSC 6/7, If I set an input TAG with the field "Log/Print Events" but does not set "Enable TAG Value Alarms" then I never will see green event on "Alarm & Events Viewer". I want only that when a TAG input is activated then a green message will be viewed on "Alarm & Events Viewer" to inform the operator of the event.
Who knows where are the alarm messages ?

[Roli]

LabVIEW DSC (6/7) differentiate between two ways to write values to the Tag engine, and therefore there are to ways to generate events on a value change:

1. In a VI control as a logos client (e.g. HMI wizared code); this means the front panel subscription (datasocket url: logos://localhost/labview/tag1) is actinig as a logos client to the tag engine as the logos server. For the event to be displayed you have to enable that remote user's event (in this case the logos client as a front panel subscription) should be generated. To do that go to your .scf file in Tag Configuration Editor (TCE) >> Configure >> Engine >> Events (tab) >> enable 'Generate Event when Remote User Changes Value'.

2. You can use the BridgeVIEW way to write values with the Write Tag.vi. This
write goes directly (through shared memory) to the DSC Engine. Make sure your input 'generate event' is TRUE.

Is that what you were looking for?

Hope this helps
Roland

[Silvano]

Hi Roland.
I know that in BridgeView 2.1 and LVDSC 6/7 I can use Write Tag.vi. It is working, when I write a memory TAG with generate event = true I see on the Alarm & Event viewer a new green row (An event). But with BridgeView 2.1 I can do that with input TAG and without using write TAG.vi. Simply I configure an input TAG to Log & Print Events, No alarm enabled but set alarm message. I don't have to write G code for this. When the input will be active the engine generate an event on the Alarm & Event viewer.
I use this functionality for log operator action. For example an operator push a button on the console (wired button), the TAG engine generate an event so I can see on event list the sequence of operator's actions.

The main question is "W
ho knows where are the alarm messages ?".
In the TCE I on tab Alarms there is the field "Alarm Message".
The help said "Type the text to display and log when the tag is in alarm".
With LVDSC7 I can't see this message In "Alarm & Event Viewer".

By Roland, thanks for your quick answer.

[Roli]

NI just uploaded a fix for DSC 7.0 - would that solve the problem?
Why Can't I See the Alarm Message in the AlertView ActiveX Control's Description Column Anymore?

Hope this helps
Roland

[Khalid]

That's some customer service! Kudos!