sig_gen FB? RemoteConnect Control Expert V16.0

[TS13]

Good morning,

I'm looking for a sig_gen function block in Control expert.

I'm not finding one and was wondering if I am missing something.  I thought that it is something that is pretty standard with all software.  

If its not there, can someone please show me how to create one? 

[TS13]

I'm looking for a sig_gen function block in Control expert.

I'm not finding one and was wondering if I am missing something.  I thought that it is something that is pretty standard with all software.  

If its not there, can someone please show me how to create one? 

[BevanWeiss · Accepted solution]

I don't think I've ever seen this SIG_GEN function before.  What platform is it from?

To create one, you'd need to look at the timing diagrams for such an implementation of it and build up each aspect individually.  Something like a 'sine signal' will be a bit annoying... you'll essentially end up calling a SINE trigonometric function, which is typically quite expensive for a PLC to execute.

Why do you need such a function?

It sounds like a combination timer, counter, and sine function [with argument 2pi*(counter current value MOD maximum)/maximum]...

[CarlW55]

 Blink, FB?

[TS13]

It is from ISaGRAF Target 3 and was meant to be available for in SCADAPack E Target 5. It is noted on page 28 in the PDF attached. However when upgrading to RemoteConnect I cannot find any information on the function block. 

It is used to show Comms Heartbeat as shown below.

[BevanWeiss]

That usage of the sig_gen block looks very confusing.

It looks like it just generates a toggling output either every 5000ms or every 1000ms depending on whether the CommFault is on.

Seems weird... I wouldn't recommend doing that.

Just toggle it every 1000ms if the goal is to detect heartbeat failures approx 1s after they occur.

RemoteConnect is neither ISAGraf 3 nor ISAGraf 5... so that'll be why it's not in RemoteConnect.  I doubt Schneider would have plans to add it either, it's very non-standard.