PROFIBUS DP-Master

The Application Interface 269/315
Additional explanations:
1. The parameter bSrcSAPIdx specifies the service access point of the remote user that carries
out this request and which data area should be updated by the abSDU. A bSrcSAPIdx value
of 63 is not permitted. A value of 64 represents the NIL SAP.
2. The parameter bSrvCls defines the FDL priority for the data transfer. Two priorities are
possible:
• PROFIBUS_DL_SERVICE_CLASS_LOW = 0 and
• PROFIBUS_DL_SERVICE_CLASS_HIGH = 1.
3. The parameter bTransmitStrategy specifies whether the update is transmitted only once
or many times, in the case of "multiple" the data area is transferred again for each subsequent
SRD service. This is done by choosing between
• PROFIBUS_DL_REPLY_UPDATE_SINGLE = 0 and
• PROFIBUS_DL_REPLY_UPDATE_MULTIPLE = 1
PROFIBUS DP-Master |
DOC061001API12EN | Revision 12 | English | 2010-12 | Released | Public © Hilscher, 2006-2010