First post here been doing lots of reading... I have been around PLC’s doing program mods and small projects as a Maintenance sparky for many years however I never really got in to the different communication protocols so I am pretty green in this area so apologies if my questions are very basic! I am currently designing a panel where I am going to use an NX1P2 and NA HMI to control a few drives etc. I only need to control and display the speed of the drives through the hmi so its no huge deal. I have worked on a system before that was set up with many drives all daisy chained together but the problem was if one of the 3g3mx’s tripped on a critical fault, it had to be powered down completely to be reset which would then drop out the ethercat and stop all the drives after the tripped one. So if this was to happen on the system I am now designing I end up with a large fire risk. So my main question is: If there is a loss of all power for say 20 seconds, will ethercat recover and continue to control the drives? Due to the fire risk I am thinking I will control the start stop of the drives through the terminals and use either ethercat or Ethernet ip to control the speed through the hmi? Anyone got any experience with power outages and how ethercat recovers?
Thanks for any help.