Profibus Communication
B.5 Output Data (from Master to Slave)
SITRANS F M TRANSMAG 2
96
Operating Instructions, 11/2009, A5E00102775-07
Bit
1
Bit
0
Profile Designation
Meaning
1
0
high limited
Measured value has exceeded upper limit (alarm, warning or sensor
limit)
1
1
constant
Measured value remains constant
Note
Limit bits can only be clearly evaluated in combination with the quality information!
Status byte combinations
Several combinations of the values of the status byte are possible in normal operation (i.e.
when the input value of the function block concerned incl. status is not simulated
In the following table, the status conditions have descending order of priority from top to
bottom. If several status conditions are satisfied, the current status with the highest priority is
reported.
Table B- 6
Valid combinations of the status byte
Meaning substatus
applies to
Value hex
quality
limits
flow
total net total
total
1F
bad
out of service
constant
X
0F
bad
device failure
constant
X
0C
bad
device failure
O.K.
X
X
X
11
bad
sensor not connected
constant
X
X
X
07
bad
configuration error
constant
X
X
X
X
00
bad
non specific
O.K
X
X
X
X
52
uncertain sensor conversion not accurate
high limited
X
X
X
X
51
uncertain sensor conversion not accurate
low limited
X
X
X
X
4F
uncertain initial value
constant
X
4B
uncertain substitute set
constant
X
47
uncertain last usable value
constant
X
8E
good
active critical alarm
High limited
X
X
X
X
8D
good
active critical alarm
low limited
X
X
X
X
8A
good
active advisory alarm
high limited
X
X
X
X
89
good
active advisory alarm
low limited
X
X
X
X
84
good
active opdate event
O.K.
X
X
X
X
80
good
O.K.
O.K.
X
X
X
X
B.5
Output Data (from Master to Slave)
The output data consist per totalizer (net, forwards and reverse) of one byte of which only
the two LSBs respectively are evaluated. All other bits are not evaluated but should be set to