9. Fieldbus interface | 9.2 - Scale protocol | 114
Action of the master Slave reaction
Writing the bit address as a func
tion number to Write_Value_S
elect.
The bit from Write_Value_Select
is set and the corresponding
function carried out.
Set the Write_Active bit.
Wait until Write_Active has been
set.
Write 0 in Write_Value_Select.
Reset the Write_Active bit.
9.2.2.4 Reading bits
Reading individual bits which are not contained directly in the read window is
only possible with a corresponding function number and the data in Read_
Data (Byte 0-3) of the read window. In those bytes, the bits must be evaluat
ed individually.
The procedure is the same as that described in ChapterReading data.
9.2.3 Reading and writing bits directly
For reading status bits and for writing direct control bits, no procedure is re
quired. The general status bits are always provided and need not be request
ed. The direct control bits are also available continuously.
9.2.3.1 Reading status bit
The status bits in bytes 5-7 of the read window are always available and can
be read directly by the master.
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