Technical data

Controlling the data exchange
To be able to control the data exchange between the CPU and CP 5430
TF/CP 5431 FMS, you must evaluate the
status word
(ANZW) for this job.
The condition contains information about the status of the job, information
about data management and error bits (refer to Figs. 12.5/12.6).
The figures illustrating the sequence of the control program (refer to Figs.
12.2/12.3) illustrate the changes in the status word.
Not
used
Error
bits
Data
mgment.
Status
bits
15 14 13 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 FMA request
with the RECEIVE HDB: correct transfer of
a confirmation)
Job active
(Request being processed or confirmation of request
not yet received)
Receive possible
Confirmation exists and can be accepted with the
RECEIVE HDB
Fig. 12.5 Structure of the Status Word, here: Status Bits
B8976060/02 Service and Diagnostics using FMA Functions
12 - 9 Volume 1