How An Analog Input Function Block Works; Aifb Function Groups - Siemens SITRANS LR560 Operating Instructions Manual
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Also See for SITRANS LR560:
- Quick start manual (270 pages) ,
- Operating instructions manual (222 pages) ,
- Compact operating instructions (66 pages)
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B.9
How an Analog Input Function Block works
The AIFB provides a linear conversion to any desired units.
1. The AIFB Input value is the processed output value of the Transducer Block, in
Transducer Block units.
2. The user selects the desired AIFB output units and scaling is applied.
3. Damping may be applied based on a time constant provided by the user. See Damping
(Page 172) for details.
4. The status of the input value from the Transducer Block is checked. If the status is Bad, a
Fail-safe condition occurs. The output is determined by the setting for Failsafe Mode.
5. Actual Mode (2.6.2.) allows the entire AI block to be overridden by a Manual Output
value. See Actual Mode (2.6.2.) for details.
6. The value is checked against the user-defined warning and alarm limits. The upper and
lower limits are defined in units corresponding to the Output range, and a limit hysteresis
can be used to adjust the sensitivity. See Alarms and Warnings (2.6.7.) for details.
7. The output value (OUT) is communicated via cyclic data transfer.
B.10
AIFB function groups
LR560 (PROFIBUS PA)
Operating Instructions, 06/2018, A5E34648471-AE
PROFIBUS PA profile structure
B.9 How an Analog Input Function Block works
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