Robb B
Lifetime Supporting Member
Hello, I've got a project where I need to get information from two ABB ACS880 VFDs onto the plant operator's screen (or alternatively, onto panelview HMI). I've been reading through the ABB and Rockwell documentation, and I think I've come to the conclusion that the SLC doesn't support the communication that I need. I came across this note in the ABB reference: "NOTE! RSLogix 500 and the PLC processor must support Class 3 messaging." I can't find anything that specifies which class of messaging the SLC 5/05 supports, though the EEM instruction has a field which allows you to specify a class (are they referring to the same classes?: "Class (hex)/(dec) - Possible Classes are 0 to FFFF (hex). See Volume 1 of the CIP Common Specification for the list of defined Classes." I haven't been able to find the CIP Common Specification on Rockwell's library.
Plan B is to bridge the SLC and ControlLogix networks (currently separate) so I can use the ControlLogix PLC's to communicate with the VFD's, though that goes through a wireless bridge which also handles a bunch of other data, so I have bandwidth concerns.
Plan C is to try using Ignition's 3rd party Ethernet driver but I think that route would involve a LOT of low level ethernet programming, something I don't think the customer wants to pay me to learn.
Has anyone done something similar? Any suggestions? Anything need clarifying or expanding?
Plan B is to bridge the SLC and ControlLogix networks (currently separate) so I can use the ControlLogix PLC's to communicate with the VFD's, though that goes through a wireless bridge which also handles a bunch of other data, so I have bandwidth concerns.
Plan C is to try using Ignition's 3rd party Ethernet driver but I think that route would involve a LOT of low level ethernet programming, something I don't think the customer wants to pay me to learn.
Has anyone done something similar? Any suggestions? Anything need clarifying or expanding?