Hello, we have a DCS that take the MODBUS DATA (RS232) via a Gateway (MOXA 3170), the Modbus TCP slave has two controllers, when the primary is working the DCS is getting the data, but when the primary fail the DCS is not getting the data since we configured only one IP address ( Primary one) on the MOXA 3170 and there is no way on how to add a second IP, in case if we provide a second moxa 3170 to get the redundancy, does someone know if we have a device that will check if the modbus link is broken the device will switch to the second mgate ( new primary controller ) ?