Interbus 73/176
3 842 530 344/2014-05, MIT: ID 40,
Bosch Rexroth AG
Bit 0
shows the status of the SLK operative flag, see Chapter 5.3.4. “SLK operative
flag”)
Bits 1 and 2
show the current status of prefetch parameterization. The flags apply
both to the unbuffered prefetch function and the buffered prefetch.
Bit 1
Prefetch is parameterized:
‘0’
= no prefetch currently parameterized in system
‘1’
=
at least one
unbuffered prefetch
or one
buffered prefetch is parameterized
Bit 2
Prefetch parameterization is open:
“0”
= prefetch parameterization is closed. If prefetches have already been
parameterized, these are executed once the system completes the
PRECONNECTED
state.
‘1’
= prefetch parameterization is open. No prefetches are executed in this state.
Bit 3
Data transfer status (see Chapter 6.6 “'Open transfer' and 'Close transfer'
functions"):
‘1’
= “Open transfer” command executed
‘0’
= “Close transfer” command executed
The value of bit 3 does
not
return the accessibility of MDT data, since the transfer
channel function is no longer active. The bit remains for the sake of compatibility
with old applications. Bit 3 remains “0” when the “Open” and “Close” commands
are not used.
Bits 4 to 7
show the actual link state (see Chapter 5.3.1 “Actual link state”); this
value does not have to be entered separately in the prefetch.
8.4.2
Data array for event-oriented data channel
The SLK provides the data from the unbuffered prefetch starting with the
third byte
of the event-oriented data exchange. If no prefetch was executed, the value of each
byte is zero.
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