Recommended Connections for a HA-CS31 System¶
CPU redundancy is ensured by using two CPUs in combination with the HA-CS31 library. Redundancy of the ETHERNET connection between CPUs and HMI can be achieved depending on the type of HMI and use of managed switches:
| SI no. | HMI (DigiVis 500/CP6xx) | CPU Redundancy | ETHERNET Redundancy | Recommendation |
|---|---|---|---|---|
| 1 | DigiVis 500 with two ETHERNET ports on PC and Layer 2 managed switch. Refer to Requirements. | Yes (with the HA-CS31 library) | Yes (complete ETHERNET network is redundant with Layer 2 managed switches). | Recommended for users who require CPU and ETHERNET network redundancy. |
| 2 | HMI CP6xx with two ETHERNET ports on HMI with same IP and Layer 2 managed switch. Refer to Requirements. | Yes (with the HA-CS31 library) | Yes (complete ETHERNET network is redundant with Layer 2 managed switches, HMI IP switching functionality is achieved by ‘Node Override IP’ functionality within the script programming. Refer to Example_AC500_HA_CS31_V242.project, HA_CS31_Example_OnlyCPU_HMI) | Recommended for users who require CPU and ETHERNET network redundancy. |
| 3 | DigiVis 500 with standard ETHERNET switch (unmanaged switch). Refer to Requirements. | Yes (with the HA-CS31 library) | No | Recommended for users who require CPU redundancy but no ETHERNET network redundancy. |
| 4 | HMI CP6xx with one ETHERNET port on HMI with standard ETHERNET switch (unmanaged switch). Refer to Requirements. | Yes (with the HA-CS31 library) | No | Recommended for users who require CPU redundancy but no ETHERNET network redundancy. |