SCADAPack 474 Modbus Register with initial value

[TimKM]

I am new to remoteconnect and SCADAPack 474s, but I am familiar with ControlExpert. Is there a way to create a modbus remoteconnect variable that has an initial value?

Or is there a flag that is only set upon startup of a program - so that a move could be enabled only once - in order to set an initial value?

Thanks in advance

[Joel_Weder · Accepted solution]

Hello Tim,

Logic Editor Elementary variables can be easily preset to initial values when writing an application:

• Open the Elementary Variables data editor
• Select a variable you want to assign an Initial Value
• In that variable's Value column, type the desired initial value
• After all initial values have been assigned, build the logic
• Save the RemoteConnect app, then go Online and Write to the RTU

These initial values are saved and written to the RTU along with the application. 

To write initial values on a power cycle or stop then restart of the logic, you could trigger Writes in logic to the desired variables when system bit %S13 goes true. It goes true only for the first scan of the MAST task.

Here's one way you can set up initial values for RemoteConnect objects:

• Add the objects to be preset into an Object Browser created for that purpose.
  (It's easiest to place all objects you want to preset into one Browser)
• In that browser, select an object to be configured
• Click the Edit Entry button
• Set the display format and the desired preset value
• After configuring all desired objects with preset values, save the application
• Go Online and Write the application to the SCADAPack
• In the online browser created, click the Write All button

This presets desired values into all objects quickly. It can be repeated at multiple sites, as the preset values are saved along with the application.