Rockwell-automation MMCL Using the Mining, Mineral, and Cement Library Manual do Utilizador descarregar pdf (Página 43)

Publication RA-UM001B-EN-P - November 2010

Developing an HMI Application 43

Communication

Supervision

The heartbeat mechanism is used to check if the FactoryTalk View SE Data

Server is still alive. The HMI tag Heartbeat reads a pulse from the

ControlLogix software. The derived tag function HeartbeatFct writes the

status of the Heartbeat tag to the derived tag HeartbeatRet. The

ControlLogix software monitors this tag for timeouts and generates an alarm.

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Rockwell-automation MMCL Using the Mining, Mineral, and Cement Library Manual do Utilizador Página 43