PROFIBUS DP-Master

The Application Interface 258/315
Packet Description
structure PROFIBUS_DL_PACKET_DATA_REPLY_REQ_T
Type: Request
Area Variable Type Value / Range Description
Head
structure TLR_PACKET_HEADER_T
ulDest UINT32 0x20/
PB_DL_QUE
Destination queue handle, unchanged
ulSrc UINT32 0 ... 2 32 -1 Source queue handle, unchanged
ulDestId UINT32 ulDL0Id Destination end point identifier, unchanged
ulSrcId UINT32 ulAPMS0Id Source end point identifier, unchanged
ulLen UINT32 8 + n Packet data length in bytes
ulId UINT32 0 ... 2 32 -1 Packet identification as unique number generated by
the Source process of the packet
ulSta UINT32 See section 7.3 Error Codes of the DL-Task.
ulCmd UINT32 0x10E PROFIBUS_DL_CMD_DATA_REPLY_REQ - Command
Data
ulExt UINT32 0 Extension (not in use, set to zero for compatibility
reasons)
ulRout UINT32 x Routing, do not change
structure PROFIBUS_DL_DATA_REPLY_REQ_T
bSrvCls UINT8 0,1 Service Class (indicating the priority)
bDstAddr UINT8 0-126 Destination address within the Profibus network
bDstSAPIdx UINT8 0-62,
bSrcSAPIdx UINT8 0-62,
abPad
UINT8[4
]
64 = NIL SAP
64 = NIL SAP
0 Padding bytes
Note: Mask out the highest bit when working with
bDstAddr in order to avoid disturbances as this bit
stores a separate information.
Destination Service Access Point
Source Service Access Point
abSDU UINT8[] Service Data Unit
Table 155: PROFIBUS_DL_CMD_DATA_REPLY_REQ - Send SRD Service Request
PROFIBUS DP-Master |
DOC061001API12EN | Revision 12 | English | 2010-12 | Released | Public © Hilscher, 2006-2010