Siemens 7SC80 Manual page 565

Function block Function block
UINT_TO_REAL Conversion
UPPER_SETPOINT Upper Limit
X_OR XOR - Gate
ZERO_POINT Zero Supression
Device-Specific CFC Blocks
Table 4-1
Name
Input SWITCH
IN1
IN2
Output OUT
Task levels:
Behavior of inputs and outputs:
Table 4-2
Name
Input HYSVAL1
HYSVAL2
VAL1
VAL2
VAL3
VAL4
VAL5
Output MAXVAL
Y1
Y2
Y3
Y4
Y5
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
MW_
BEARB
X
X
X
X
ASWITCH – This block is used to switch between two REAL inputs (RMS values).
Type
BOOL
REAL
REAL
REAL
Recommendation: Into task levels PLC1_BEARB and PLC_BEARB, because these
levels are directly triggered.
Note: If you use this block in the task levels MW_BEARB and SFS_BEARB, a
change of the SWITCH signal is only recognized if the signal lasts longer than
the processing cycle of the task level.
With the CFC block MaxValSel, you can determine the greatest value from 5 input values
taking into account the hysteresis value 1 (HYSVAL1) and issue it via MAXVAL. For the
greatest input value, the respective output Y1 to Y5 is set to "1" taking into account the
hysteresis value 2 (HYSVAL2).
Typ
REAL
REAL
REAL
REAL
REAL
REAL
REAL
REAL
BOOL
BOOL
BOOL
BOOL
BOOL
Task level
PLC1_ PLC_
BEARB BEARB
X
—
X
—
Description
Analog value selection
Analog value
Analog value
Selected analog value
Description
Hysteresis for determining MAXVAL
Hysteresis for determining Y1 to Y5
Operand 1
Operand 2
Operand 3
Operand 4
Operand 5
Max value from {0,VAL1,..,VAL5}
VAL1 = MAXVAL +/- HYSVAL2
VAL2 = MAXVAL +/- HYSVAL2
VAL3 = MAXVAL +/- HYSVAL2
VAL4 = MAXVAL +/- HYSVAL2
VAL5 = MAXVAL +/- HYSVAL2
Technical Data
4.22 User-defined Functions (CFC)
SFS_
BEARB
X X
— —
X X
— —
Default function
FALSE
0.0
0.0
Default function
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0
0
0
0
0
0
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