Siemens DP/AS-Interface Link 20E Manual page 57

Table 2-2 Parameters for Sending/Receiving
DP-V1 SIMATIC S7 (SFC 58/59)
PROFIBUS LADDR
address
(the start address of the
cyclic input bytes of the
DP/AS-i Link
specified (see also Section
1.9). The S7 CPU calculates
the PROFIBUS address from
this information.)
IOID
The following fixed value
must be entered: B#16#54
Slot_number Is calculated from LADDR;
Not an SFC parameter
Index RECNUM
Length RECORD
Referenced using ANY
pointer
Data RECORD
Referenced
pointer
RET_VAL
BUSY
You will find sample programs for SIMATIC S7 in Section 2.4.3
DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04
Data Exchange Between the DP Master and AS-i Slave
For PC: DP programming
interface (dpc*_read/write)
C_Ref
must be
–
Slot_number
Index
Length_s
Data_s
using ANY
Meaning
PROFIBUS address of the
DP/AS-i Link (DP slave)
Fixed value
With DP/AS-i Link:
Any value
Data record number
(140–147; see Table 2-3)
Length of the input/output
data area
Address of the input/output
data area
Return parameter for
execution check
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