ADS-Interface

ADS NetId of the PROFIBUS interface

A NetId is required for the ADS communication. This can be found in the ADS tab of the PROFIBUS interface in the TwinCAT System Manager.

ADS-Interface

All acyclic data are transferred to or from the Embedded PCs with ADS Read, ADS Write or ADS Write Control. The Profibus interface of the Embedded PCs has a dedicated Net ID and supports the following ports:

Port	Description
200	Addresses the PROFIBUS interface itself, i.e. data stored locally on the PROFIBUS interface, for which usually no additional bus access is required.
0x1000 - 0x107E	Addresses a connected PROFIBUS device, whereby the address is calculated from port 0x1000 (or 0x1000 + slave address); always includes bus access.

ADS-Read

An overview of the IndexGroup/IndexOffset supported by the Embedded PCs for ADS Read is provided below.

IndexGroup for local addressing of the Embedded PC (port 200)
IndexGroup (Lo-Word)	IndexGroup (Hi-Word)	IndexOffset	Description
0xF181	0x0000-0x007E	BYTE offset within the data	This will read the diagnostic data of a configured DP slave. The station address is calculated from the IndexGroup(Hi-Word). If the ADS Read is answered without error (error code = 0), the data will contain the diagnostic data of a configured DP slave described in section Slave-Diagnose.
0xF830	0x0000-0x007E	always 0	Can be used to determine which DP slaves are present on the PROFIBUS, regardless of whether they were configured or not; the station address is entered in the IndexGroup (high word). If the ADS-Read is answered without error (error code = 0), the corresponding DP slave has answered correctly. The data contain the Ident no. of the slave (BYTE offset 0-1) and the read CfgData (from BYTE offset 2) (see: Uploading the Configuration).

IndexGroup for addressing of a configured PROFIBUS device (port 0x1000-0x107E)
IndexGroup (Lo-Word)	IndexGroup (Hi-Word)	IndexOffset	Description
0x00-0xFF	0x00	0x00-0xFF	This will send a DPV1-Read to the appropriate, configured DPV1 slave via a Class -1 connection; the DPV1 slot number corresponds to the IndexGroup, the DPV1 index corresponds to the IndexOffset. If the ADS Read response is error-free (error code = 0), the data contain the read DPV1 data (see: DPV1 communication)

ADS-Write

An overview of the IndexGroup/IndexOffset supported by the Embedded PCs for ADS Write is provided below.

IndexGroup for addressing of a configured PROFIBUS device (port 0x1000-0x107E)
IndexGroup (Lo-Word)	IndexGroup (Hi-Word)	IndexOffset	Description
0x00-0xFF	0x00	0x00-0xFF	This will send a DPV1-Write to the appropriate, configured DPV1 slave via a Class -1 connection; the DPV1 slot number corresponds to the IndexGroup, the DPV1 index corresponds to the IndexOffset (see: DPV1 communication).

ADS-WriteControl

An overview of services supported by the Embedded PCs for ADS WriteControl is provided below.

ADS-WriteControl for addressing a configured PROFIBUS device (port 0x1000-0x107E)
AdsState	DeviceState	State of the slave	Description
STOP (6)	0x00	RUN (5)	This will stop the slave, i.e. the process data connection to the relevant DP slave (Data_Exchange) is removed (with SetPrm,Unlock).
RUN (5)	0x00	STOP (6)	This will restart the slave after a stop, i.e. the process data connection to the relevant DP slave (Data_Exchange) is re-established (normal DP start-up).