Siemens SITRANS LR260 Operating Instructions Manual page 125
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Also See for SITRANS LR260:
- Quick start manual (225 pages) ,
- Operating instructions manual (184 pages) ,
- Application manual (2 pages)
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Device / Output Simulation
Setting
AUTO
automatic
MAN
manual
O/S
function block disabled
One of three settings can be selected: the result is the output parameter (OUT).
AIFB execution steps:
The AIFBs can provide a linear conversion to any desired units.
1.
The input value is normalized (Scaling Input)
Process Variable range applies to any of the four LTB values. (Units of the Process
Variable scale are the same as the units used for the LTB output.) Output units
together with Process Variable range determine how the LTB output is converted to
whatever units the customer wants.
2.
The scaling output is applied.
For example:
6
5
4
3
2
1
0
1
3.
This value is filtered using a first order filter based on a time constant provided by
the user.
4.
The status of the Process Variable (input value) is checked. If the status is Bad, a
Fail-safe condition occurs. The output is determined by the Fail-safe Mode of the
block.
5.
The target mode parameter allows the entire AI block to be overridden by a Manual
Out value.
6.
The value is checked against the user parameterized warning and alarm limits.
(There is an upper and lower warning limit and an upper and lower alarm limit. The
unit of the limits corresponds to the unit of the output range. A hysteresis parameter
prevents toggling in the Status field of the OUT value.)
7.
The OUT VALUE parameter is the value for the cyclic data transfer.
A5E32337685
SITRANS LR260 (PROFIBUS PA) – OPERATING INSTRUCTIONS
description
2
3
4
5
Output range:
Output value
the automatically-recorded measured value
a manually-set fixed simulation value
the preset safety value.
AIFB
2
Out (or AIFB
Out)
2
straight to LCD
(same values displayed
on LCD as PLC)
Page 119
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