Technical data

If the bit "job complete with error" is set in the status bits, the "error bits"
provide the coding of the cause. With the "channels" only the PLC error is
indicated (error numbers 1 to 6). Errors processing an FDL request are
transferred with the corresponding confirmation. The error number 15 (0F
H
)
is set by the CP when the corresponding SAP was not enabled. With this
number, the bits "job complete with error" and "job active" are also set
(ANZW 0F0A
H
). The way in which this data transmission is handled
between two SIMATIC PLCs can be seen in Figs. 8.7 to 8.11. Before these
figures, there is an explanation of the sequence of the transmission. Figs.
8.7 to 8.11 also take into account the status bits in the status word (e.g.
ANZW....1H" means "RECEIVE possible").
Data acceptance/transfer
(enable/disable bit)
Reserved
Data transfer complete on CP
(FDL request was transferred),
This bit is reset by the HDB
Data acceptance complete
(FDL indication or FDL confirmation
transferred to PLC)
This bit is reset by the HDB
Error
bits
Data
mgment.
Status
bits
For meaning of
the error bits:
refer to Table 8.3
11 10 9 8 7 6 5 4 3 2 1 0
This bit is not required here, no
fragmentation
Fig. 8.5 Structure of the Status Word, here: Data Management
B8976060/02 Free Layer 2 Communication
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