Simply replace the device, and the controller locates and activates it. If a Profibus PA device needs to be replaced and a generic profile is used, set the address and replace the device-even if the device is from a different manufacturer! Profinet offers “Simple Device Replacement,” where a device can be replaced without setting an address or using a configurator or computer. When devices need to be replaced, there are two methods available to speed the task. These protocols can display alarms and conditions in an HMI as well. In addition, for Profinet, standard information technology (IT) protocols can be used to monitor the network. Similar tools are available for Profinet. For a Profibus network, special-purpose tools are available for ad hoc or permanently connected monitoring of the network. The network configuration tools from the controller manufacturer can be used as a first-line diagnostic tool. Furthermore, the protocols notify and convey asset management information that can be used for predictive maintenance or condition-based monitoring.Īnd finally, information about the network itself is available. In addition, the protocols convey diagnostic information about the variables being communicated: a “flag” accompanying a variable from a process instrument indicates if the value is good or suspect. The protocols themselves define and support the alarms.
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