Three times in the past week I have had to re-download a program onto a ML1100 installed in a rooftop A/C unit. Program seemingly evaporates...
Mircologix 1100
OS Ser B
FRN 14.0
Processor Cat no. 1763-LEC
Processor series B
Processor FRN 3.0
NO memory module
The PLC was installed to replace a proprietary circuit board assembly that came with the A/C unit in 2014. I don't recall the program evaporating until recently.
No electrical modifications. Everything is properly grounded. An Eaton powerline filter was installed when PLC was installed. Something like this: http://www.automationdirect.com/adc/Shopping/Catalog/Power_Products_(Electrical)/Power_Line_Filters/Eaton_1-Phase_Power_Line_EMI_-z-_RF_Filters_w-z-Surge_Protection/ADPV12003
One thing I did notice is that we have had a lot of lightning recently. As a matter of fact, there were over 4000 recorded discharges locally one evening last weekend and the program was lost twice over the weekend.
There were also a lot of lightning last night.
What's weird is that identical PLCs installed in similar A/C units on the same roof remain unaffected
Has anyone had similar experiences and found a solution?
Mircologix 1100
OS Ser B
FRN 14.0
Processor Cat no. 1763-LEC
Processor series B
Processor FRN 3.0
NO memory module
The PLC was installed to replace a proprietary circuit board assembly that came with the A/C unit in 2014. I don't recall the program evaporating until recently.
No electrical modifications. Everything is properly grounded. An Eaton powerline filter was installed when PLC was installed. Something like this: http://www.automationdirect.com/adc/Shopping/Catalog/Power_Products_(Electrical)/Power_Line_Filters/Eaton_1-Phase_Power_Line_EMI_-z-_RF_Filters_w-z-Surge_Protection/ADPV12003
One thing I did notice is that we have had a lot of lightning recently. As a matter of fact, there were over 4000 recorded discharges locally one evening last weekend and the program was lost twice over the weekend.
There were also a lot of lightning last night.
What's weird is that identical PLCs installed in similar A/C units on the same roof remain unaffected
Has anyone had similar experiences and found a solution?