DP-V1 communication
80
PROFIBUS SD2 telegram for SAP 51
The Read/Write service uses a variable-length PROFIBUS SD2
telegram shown below.
Figure 14. PROFIBUS SD2 telegram
DP header DP trailer
SD LE LEr SD DA SA FC DSA SSA DU FCS ED
68h x x 68h xx xx x xx xx x… xx 16h
SD = Start Delimiter
LE = Length
LEr = Length repeated
DA = Destination Address
SA = Source Address
FC = Function Code
DSAP = Destination Service Access Point
SSAP = Source Service Access Point
DU = Data Unit for DP services
FCS = Frame Checking Sequence
ED = End Delimiter
Data unit
DP-V1 Command/Response PROFIdrive V3 Parameter Channel
DU0 DU1 DU2 DU3
Request/Response header
(see Table 18/19 below)
Data
Byte Meaning Value
DU0 Function number See Table 15 below
DU1 Slot number 1 = Drive parameter access
DU2 Index 47 (0x2F)
DU3 Data length (Depends on type of message)
DU4…DUn PROFIdrive data
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