in reply to: Re: Re: Command 13 Read Tag, Descriptor, Date posted by Jens on 05 September 2011 at 09:26:58.
Oh, the Board has a problem with my text, so here is the rest of my question:
There's one more question that i am not sure about when i read the specs.
Command 15 has the PV Damping Value as units of seconds in it's response data. What is the definition of that Damping Value? What time is meant there?
In Common Practice Command Specification for Command 64 they say:
The additional damping value represents one time constant. In other words, the output response to a step input is 63% of final steady-state value after this time has elapsed. For a transmitter, only the responce of the analog output(e.g. the Loop Current) is damped. For an actuator, the response of the associated Device Variable or Dynamic Variable (e.g. the Primary Variable's digital value) is damped as well.
Does that mean, the PV Damping Value delivered by command 15 ist always 0 for a transmitter?
Thanks in advance!