Posted 24 Nov 2021 Hi everyone... I'm not a AB expert.. I'm using L74 controller, Rm2 redenduncy module, EN2TR and EN2T module (on each chassis) on my control logix project and having 3 remote IO's rack on ring topology... I have use EN2TR for ring topology and EN2T for scada communication. The problem is my controllers are not synchronising on fibre optics... I have to connect both EN2T modules with one an other for controller's synchronisation. They are syncing over ethernet but not over optical... your help is appreciated Thanks in advance Share this post Link to post Share on other sites
Posted 3 Dec 2021 Good day, How are your EN2T's connected for the SCADA? We have a similar setup, from the EN2T's we go to two Stratix 8000's that is connected to 2 Cisco switches with a crossover between the 2 switches. The redundancy checks the connection of all the communication modules, if the cable on the one EN2T is disconnected, then that chassis will disqualify. I hope this helps. Share this post Link to post Share on other sites
