Writing cyclic values to the process image
The source for values that are written cyclically to the process image depends on the setting at
input parameter
SelStrInputs
:
●
SelStrInputs
=
FALSE
(default): The values and signal states for the I/O outputs are
transferred from output structure CyclData.Output which is interconnected with visualization
block SiFC43PA.
●
SelStrInputs
=
TRUE
: The values and signal states for the I/O outputs are transferred
from the
SetTot1/2/3, DCtr, CtrlCmd
,
CtrlCmdEnable
inputs and their signal
states to the device.
Retain last values if I/O values are invalid
The block retains the last valid values if invalid I/O values were found (inputs <> 16#80xxxxxx
or
RackF
=
TRUE
).
Signal state for process values
The signal state of process values (output structure
CyclicData
.
Inputs
) is derived from the
higher-level error, or from the signal state returned by FC430. In the case of higher-level errors
such as rack failure (inputs Mode <> 16#80xxxxxx or
RackF
=
TRUE
), status (.ST) 16#00 is
output and otherwise the value provided by FC430 PA.
Simulating signals
The block does not have a function for simulating process values.
13.4.4
Error handling of FbFC43PA
Error handling of FbFC43PA
The following errors can be displayed for this block:
● Higher-level error
● Module errors
Higher-level error
Higher-level errors are indicated by the value 1 at output parameter
QRackF
if the signal state
in the HighWord of input parameter
Mode
changes to a value other than 16#80 , or if
input
RackF
is set.
The
CyclData.Csf
output is set in addition, and the signal status 16#00 output in the output
parameters
Input.MassFlow.ST
,
Input.Density.ST
,
Input.PMedTemp.ST
,
Input.Tot1.ST
,
Input.Tot2.ST
,
Input.VolFlow.ST
,
Input.FractnA.ST
,
Input.FractnB.ST
,
Input.FractnAp.ST
,
Input.FractnBp.ST
,
Input.CorVolFlow.ST
,
Input.FrameTemp.ST
,
Input.Tot3.ST
,
SITRANS FC430 PA
13.4 FbFC43PA
SITRANS Library for PCS 7
Function Manual, 05/2019, A5E35351976-11
635
Summary of Contents for SITRANS PCS 7
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Page 418: ...SITRANS P 10 2 SitraPDr SITRANS Library for PCS 7 418 Function Manual 05 2019 A5E35351976 11 ...
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