340 Control through a fieldbus adapterSystem overviewThe drive can be connected to an external control system through a serialcommunication link using either an embedded fieldbus interface or a fieldbus adapter.The fieldbus adapter module is installed into drive Slot 3.The drive can be set to receive all of its control information through the fieldbusinterface, or the control can be distributed between the fieldbus interface and otheravailable sources, for example, digital and analogue inputs.Fieldbus adapters are available for various serial communication protocols, forexample• PROFIBUS DP (FPBA-xx adapter)• CANopen (FCAN-xx adapter)• DeviceNet (FDNA-xx adapter)• L ONWORKS® (FLON-xx adapter).Data FlowProcess I/O (cyclic)Process I/O (cyclic) orService messages (acyclic)Control Word (CW)ReferencesFieldbuscontrollerParameter R/W requests/responsesStatus Word (SW)Actual valuesFieldbusOtherdevicesDriveType Fxxx fieldbusadapter in Slot 3