Acyclic data
The ADS function blocks are used to send acyclic data. They access the PROFINET record data. So that acyclic data can be read or written, the PROFINET device must be in data exchange mode.
An ADSReadWrite is set.
ADS settings
AMSNetID: The AMSNetID of the Profinet controller
PORT: Port number of the device (take this from the System Manager)
Index GROUP: 0x0000_F823
Index OFFSET: 0x0000_0000
DATA
typedef struct {
WORD RW;
#define PN_READ 0
#define PN_WRITE 1
WORD NrOfAR;
DWORD API;
WORD Slot;
WORD SubSlot;
PNIO_RECORD RecordData;
} PNIO_CONFIGRECORDnRW | nNr | nAPI | InSlot | SubSlot | nIndex | nLen | nTrans | nLenA |
|---|---|---|---|---|---|---|---|---|
2 bytes | 2 bytes | 4 bytes | 2 bytes | 2 bytes | 2 bytes | 2 bytes | 2 bytes | 2 bytes |
Example:
Send a read request for I&M function 0
nRW | nNr | nAPI | InSlot | SubSlot | nIndex | nLen | nTrans | nLenA |
|---|---|---|---|---|---|---|---|---|
00 00 | 00 00 | 00 00 00 00 | 00 00 | 01 00 | F0 AF | 00 00 | 01 00 | 00 00 |
Note
Pay attention to the memory size
Make sure that the receive data memory is large enough.