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either with the "old" input data of reply update buffer D (in other words reply
update buffers D and N are not swapped before sending the response). This is
the situation when no valid input data have been entered in the reply update
buffer N (in other words, RUP-N-Valid = 0 in the DEFAULT SAP) or the input
data in reply update buffer D are frozen (DIAG.FREEZE mode = 1, see Section
6.2.4).
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or with the "new" input data if the reply update buffers D and N were swapped
prior to sending the response. The buffers are swapped if RUP-N-Valid = 1 and
DIAG. FREEZE mode = 0 is set. The SPC 4-2 then sets the flag RUP-N-Valid
= 0 in the DEFAULT SAP. The buffers are swapped and the RUP-N-Valid flag
is reset with lock active.
54
PROFIBUS Controller SPC 4®-2 LF
C79000-G8976-C157-3
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