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131
10
Unity Pro
DINT_AS_WORD_DFB
33002515 07/2012
DINT_AS_WORD_DFB: Type 
conversion
Description
Function description
This derived function block converts one input word from the DINT data type to 2 
output values of the WORD data type.
The individual words of the DINT input are assigned to the outputs according to the 
output names.
EN and ENO can be configured as additional parameters.
Representation in FBD
Representation:
Representation in LD
Representation:
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DINT_AS_WORD_DFB
132
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Representation in IL
Representation:
CAL DINT_AS_WORD_DFB_Instance (IN:=DINT_variable, 
LOW=>LowWord, HIGH=>HighWord)
Representation in ST
Representation:
DINT_AS_WORD_DFB_Instance (IN:=DINT_variable, 
LOW=>LowWord, HIGH=>HighWord) ;
Parameter description
Description of the input parameters:
Description of the output parameters:
Parameters
Data type
Meaning
IN
DINT
Input
Parameters
Data type
Meaning
LOW
WORD
least significant word
HIGH
WORD
most significant word
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133
11
Unity Pro
DIOSTAT
33002515 07/2012
DIOSTAT: Module function status 
(DIO)
Description
Function description
This function provides the function status for I/O modules of an I/O station (DIO).
Each module (slot) is displayed as an output "status" bit. The bit on the far left side 
in "status" corresponds to the slot on the far left side of the I/O station.
NOTE: If a module of the I/O station is configured and works correctly, the 
corresponding bit is set to "1".
EN and ENO can be configured as additional parameters.
Representation in FBD
Representation:
Representation in LD
Representation:
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DIOSTAT
134
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Representation in IL
Representation:
CAL DIOSTAT_Instance (LINK:=LinkNumber, DROP:=DropNumber,
STATUS=>Status)
Representation in ST
Representation:
DIOSTAT_Instance (LINK:=LinkNumber, DROP:=DropNumber,
STATUS=>Status) ;
Parameter description
Description of the input parameters:
Description of the output parameters:
Parameter 
Data type
Meaning
LINK
UINT
Link No. (0...2)
DROP
UINT
I/O station no: (1...64)
Parameter 
Data type
Meaning
STATUS
WORD
Status bit pattern (see page 133) of an I/O station
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135
12
Unity Pro
GET_TOD
33002515 07/2012
GET_TOD: Reading the hardware 
clock (Time Of Day)
Description
Function description
This function block searches (together with the other function blocks in the HSBY 
group) the configuration of the respective PLC for the necessary components. 
These components always refer to the hardware actually connected.
Therefore the correct functioning of this function block on the simulators cannot be 
guaranteed. 
The GET_TOD function block reads the hardware clock, if relevant registers are 
provided with this configuration. If these registers are not present, the TOD_CNF 
output is set to "0".
EN and ENO can be configured as additional parameters.
Representation in FBD
Representation:
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GET_TOD
136
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Representation in LD
Representation:
Representation in IL
Representation:
CAL GET_TOD_Instance (TOD_CNF=>RegisterPresentFlag, 
D_WEEK=>DayOfWeek, MONTH=>Byte_variable2, 
DAY=>Byte_variable3, YEAR=>Byte_variable4, 
HOUR=>Byte_variable5, MINUTE=>Byte_variable6, 
SECOND=>Byte_variable7)
Representation in ST
Representation:
GET_TOD_Instance (TOD_CNF=>RegisterPresentFlag, 
D_WEEK=>DayOfWeek, MONTH=>Byte_variable2, 
DAY=>Byte_variable3, YEAR=>Byte_variable4, 
HOUR=>Byte_variable5, MINUTE=>Byte_variable6, 
SECOND=>Byte_variable7) ;
GET_TOD
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137
Parameter description
Description of the output parameters:
Parameters
Data type
Meaning
TOD_CNF     BOOL
"1" = 4x-register for hardware system clock was 
found and the clock is operational. 
"0" = time is set at the moment. In this case the other 
outputs keep their values.
D_WEEK     BYTE
Weekday, 1 = Sunday .. 7 = Saturday
MONTH    
BYTE
Month 1..12
DAY    
BYTE
Day 1..31
YEAR    
BYTE
Year 0..99
HOUR    
BYTE
Hour 0..23
MINUTE
BYTE
Minute 0..59
SECOND     BYTE
Second 0..59
GET_TOD
138
33002515 07/2012
33002515 07/2012
139
13
Unity Pro
LIMIT_IND_DFB
33002515 07/2012
LIMIT_IND_DFB: Limit with 
indicator
Description
Function description
This derived function block transfers the unchanged input value (Input) to the 
Output, if the input value is not less than the minimum value (LimitMinimum) and 
does not exceed the maximum value (LimitMaximum). If the input value (Input) 
is less than the minimum value (LimitMinimum), the minimum value will be 
transferred to the output. If the input value (Input) exceeds the maximum value 
(LimitMaximum), the maximum value will be transferred to the output.
Additionally, a indication is given if the minimum or maximum value is violated. If the 
value at the (Input) input is less than the value at the (LimitMinimum) input, the 
(MinimumViolation) output becomes "1". If the value at the (Input) input is more 
than the value at the (LimitMaximum) input, the (MaximumViolation) output 
becomes "1".
The data types of the (LimitMinimum, Input, LimitMaximum) input values and 
the (Output) output value must be identical.
EN and ENO can be configured as additional parameters.
Formula
Block formula:
OUT = IN, if (IN ≤ MX) & IN ≥ MN
OUT = MN, if (IN < MN)
OUT = MX, if (IN > MX)
MN_IND = 0, if IN ≥ MN
MN_IND = 1, if IN < MN
MX_IND = 0, if IN ≤ MX
MX_IND = 1, if IN > MX
LIMIT_IND_DFB
140
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Representation in FBD
Representation:
Representation in LD
Representation:
Representation in IL
Representation:
CAL LIMIT_IND_DFB (MN:=LimitMinimum, IN:=INPUT,
MX:=LimitMaximum, MN_IND=>MinimumViolation,
OUT=>Output, MX_IND=>MaximumViolation)
Representation in ST
Representation:
LIMIT_IND_DFB (MN:=LimitMinimum, IN:=INPUT,
MX:=LimitMaximum, MN_IND=>MinimumViolation,
OUT=>Output, MX_IND=>MaximumViolation) ;
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