S
hi everybody,
we have already established communication between DCS AS Master (Yokogawa) two cards (ALE 111) for redundancy and mark vie two HMI as slave Modbus/tcpip through Ethernet cables. we have one hmi 1 (modbus configuration server) connected with DCS CARD ALE 111, and the other hmi 2 connected with dcs other card ale 111. this configuration for redundancy that means both hmi 1 & 2 send same signals and dcs request same data from both hmi 1 & 2 with separate two cards.
the problem is when we disconnect hmi 1 (configuration server), both communication to dcs down. but if we disconnect hmi 2, only the corresponding card in dcs data down. so there is no redundancy.
i want to know what to do for this configuration to get redundancy?
we have already established communication between DCS AS Master (Yokogawa) two cards (ALE 111) for redundancy and mark vie two HMI as slave Modbus/tcpip through Ethernet cables. we have one hmi 1 (modbus configuration server) connected with DCS CARD ALE 111, and the other hmi 2 connected with dcs other card ale 111. this configuration for redundancy that means both hmi 1 & 2 send same signals and dcs request same data from both hmi 1 & 2 with separate two cards.
the problem is when we disconnect hmi 1 (configuration server), both communication to dcs down. but if we disconnect hmi 2, only the corresponding card in dcs data down. so there is no redundancy.
i want to know what to do for this configuration to get redundancy?
