HA-Modbus TCP Preconditions

HA-Modbus TCP is supported as of Automation_Builder 2.0 and the before mentioned corresponding AC500 CPUs.

AC500 V3 PLC is not supporting external couplers (e.g. ETHERNET or CAN) therefore onboard ETH1, ETH2 and CAN ports are to be used for communication.

1024 is the sync array size: Either 1024 HA DATA SYNC function block instances alone or together 1024 instance of HA DATA SYNC + HA utility function block can be used.

The HA-CS31 system takes care of the first fault only. This fault must be detected by the user, to plan a repair as soon as possible as redundancy might be lost. If more than one error occurs in the same PLC, restart the system to reset the error.

The SCADA/ HMI has to be used to only read/ use data from the primary PLC. Parameters and control data should be always written to both PLCs or has to be synchronized via the function block.