Topics

1

Support Questions / DataSubscriber PollRate (3.61)

« on: January 16, 2014, 12:10:15 PM »

This question is mainly for Archie but someone else might be able to answer.

In the DataSubscriber component in the AdvancedHMI project, there is a PollRate property.

However nothing seems to be done with this (Aside from a Get / Set).  When I look through the DataSubscriber code, under the SubscribeTo function (line 315), I see:

Code: [Select]

Dim NotificationID As Integer = m_CommComponent.Subscribe(PLCAddress, 1, 250, callBack)
So the DataSubscriber appears to be forcing a hardcoded subscription rate of 250ms, while the PollRate property of the DataSubscriber is being unused.

Was there is a reason for this? 
It should be simple just to modify to component to use the PollRate property, but I  wasn't sure if this omission was intentional or if the object is supposed to be using it.

Kris

EDIT:

Upon further inspection is appears all the Controls seems to update at the 250ms rate as well.

2

Support Questions / AdvancedHMI Controls and Subscriptions

« on: October 28, 2013, 04:23:13 PM »

Hi all,

Did some searching and am still a bit confused on a few points.

I'm not exactly sure how to use the Subscription ability.  Is it global or on a per control / plc tag basis?

If I create a Basic Label or Indicator, is it automatically subscribed to, or do I need to enable a subscription?
If I don't use a subscription, do I need to manually program a Read in order for the control to update?

Right now the few programs I have made do not use the AdvancedHMI controls.  Instead I have been manually reading each tag asynchronously, using an event handler to tell what just updated, and moving the new data into a Winform control (button, textbox, label, etc...).

Thanks!