I have a devicenet network with slc 05 module 1747 sdn and two flex io systems with 1794adn adapters. After a thunderstorm where lightning struck us near the facility The 1747sdn module had an indicator LED flashing in red and error code 91.
I connected to the network through 1784 u2dn to be able to configure from RSnetworks, but the program only saw the Flex io, not the 1747sdn module. According to the manual, a resistance of 60 ohms must be measured between the blue and white wire, when measuring with the instrument it gave me 120 ohms, which seems to indicate that a resistance was missing at one of the ends, so I placed a resistance of 120 ohms in the end of the devicenet module, to get the 60 recommended measure.
The module was kept with an error code 91 So I decided to change it for another card, when changing the card the module indicator LED was no longer in red but it was impossible for me to communicate with the card through Rsnetworx. The other two nodes of the devicenet network had to be disconnected so that I could see the module in the RS networks. I loaded the configuration of a similar network previously saved in the computer, but when connecting the other nodes of the network to load the scan list the network fell and I could not continue with the configuration of the module and now i can not see any node from Rsnetworx.