Dennis MacKay
Member
- Join Date
- May 2004
- Posts
- 1
I have 4 micrologix 1500's running various areas of a beef processing plant, all of wich are tied together through ethernet, via ethernet to devicenet adapters. The kill floor of the plant runs off of one 1500 independantly, the fabrication room runs off another 1500 independantly. Our refrigeration for all of our beef coolers and the fabrication floor, as well as the 120 degree water heater all run off of the other two. The two are controlled by a panelview 300 to set cooling zones into manual, auto, or off, through the PLC upstairs, it communicates through ethernet to the PLC downstairs and it turns the fan MCC buckets for those units on and off. We have been having a problem reoccouring approximately every 24 hours with the two refrigeration PLC's. At approximately 2:00 A.M. each of the past 2 days we lose ethernet communication between the PLC's and to the panelview. We have to resolve the problem by re booting the adapters and the PLC's to re-establish communication. Once we do that, refrigeration is back on line again. This system has been online and operating the refrigeration and boiler for a little over a year now without this problem ever occouring, any clues to point me in a direction to resolve this issue would be greatly appreciated. Thanx,
Dennis
Dennis