I am having a challenge with AC500(PM554) and PLC communication.
I am seeking for assistance regarding programming the AC500(PM554). I am doing a project for a pump station and they want to control three ACS580 MV with the PLC and HMI, so now we have commissioned one drive so I am having a challenge with the program it seems like when the PLC and HMI is ON and maybe refresh parameter 50.27 or the drive is turned Off including the control voltage then when it turned on aging the communication between the drive PLC and HMI do not come back on, so which lead to turning Off and the PLC and HIM to refresh the communication. The problem with turning the PLC and HMI On and Off is that they will be controlling three drives so I need help with the setting for PLC so that when one drive is turned Off and ON the PLC should be able to communicate with the drive without turning the PLC ON and Off.
When a ABB drive is powered down your logic needs to know that has happened then you can change you Status of the Bits to Turn it back on.
Are you looking at the drive status word?
When the drive is powered down do you Disable the Communication to that Drive till it is powered back on?
Its hard to quess what your missing?