Technical data

The status word is part of a double word defined by the parameter ANZW in
the HDB call. The second part of the double word is the length word which
indicates how many data have already been transferred for the current job.
The structure of the status word is basically identical to that for S5-S5
communication, however, it is handled differently.
Structure of a status word
☞
Apart from the status word, you must also evaluate the
"link_status" byte from the confirmation header (or indication
header of an SRD indication) in the control program. The
significance of the information in the "link_status" byte (or in
the indication header of an SRD indication) can be seen in
Table 8.1/8.2.
Not
used
Error
bits
Data
mgment
Status
bits
15 1413 12 11 10 9 8 7 6 5 4 3 2 1 0
Job complete with error
Error transferring a request or when accepting
an indication or confirmation
Job complete without error
(with SEND HDB: correct transfer of an FDL request
with the RECEIVE HDB: correct transfer of
a confirmation or indication)
Job active
(Request being processed or confirmation of request
not yet received) only set when the SAP is disabled or
Receive possible
Confirmation or indication exists and can be accepted with the
RECEIVE HDB
not yet released
Fig. 8.4 Structure of the Status Word, here: Status Bits
Free Layer 2 Communication B8976060/02
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