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Programming MOBY-ASM on PROFIBUS-DP-V1
The following figure shows the layout of a non-cyclic data record. SAP 51 is used
to transmit the data. The data unit (DU) indicates how the MOBY-ASM is
addressed.
SD
LE
68H
x
Octet 1
0
1
0
Octet 2
Octet 3
Octet 4
B-26
LEr
SD
DA
SA
x
68H
8x
8x
0
1
1
1
1
0
Function code (e.g., DS_Read.req)
(DS = Data Record)
0= Request/response okay
1= Response error frame
0
Slot_Number: ASM 452, 454, 754, 854, 850 = 0
0
Index ¢
0
Data length
FC
DSAP
SSAP
DU
x
51/33H
51/33H
x...
ASM 475, 473 = 0 to 7, 1 to 7
(corresponds to
slot in an
ET 200M, ET 200X)
Data record number for channels 1
to 4 (see next table)
J31069-D0155-U001-A0-7618
FCS
ED
x
16H
FC 56
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