Device Functions Proline Promass 83 FOUNDATION Fieldbus 6 Discrete Output function block
Endress+Hauser 191
Example for controlling positive zero return via the Discrete Output function block.
The following example shows how positive zero return can be activated or deactivated via the
Discrete Output function block during a cleaning procedure.
1. In the first step, the connection between the Discrete Output function block and the
Transducer Block must be established. Here, the value 16 must be assigned to the parameter
CHANNEL in the Discrete Output function block.
→ Parameter CHANNEL → 16 (= Discrete Output function block)
2. In the CAS operating mode, the Discrete Output function block processes the set point value
specified at the input CAS_IN_D by the upstream function block and transfers it to the
Transducer Block.
Activating positive zero return
With a starting value of 0 (Discrete state 0), positive zero return is activated by a status change
from 0 to 2 at input CAS_IN_D.
Deactivating the positive zero return
Positive zero return can only then be deactivated when the input value at CAS_IN_D has first
been set to output value 0 (Discrete state 0). Only then can positive zero return be deactivated
through a status change from 0 to 2 at input CAS_IN_D.
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