Chapter 8 Logic Instructions
8-339
8_
FB/FC
Explanation
Applicable model
FC
GetBitOffsetValue is used to read the value of the specific bit of the
specified address and display it in the output parameter.
DVP15MC11T
DVP15MC11T-06
GetBitOffsetValue
StartRegister
GetBitOffsetValue
Offset
EN
E NO
Parameters
Parameter name
Meaning
Input/ Output
Description
Valid range
StartRegister
Starting address
Input
Specify the starting
address
Offset
How many bits
are offset
Input
Specify the offset value by
regarding the bit0 of the
variable that
StartRegister
points to as the reference
0~1023
GetBitOffsetValue
The read bit
value
Output
The read bit value
TRUE / FALSE
B
oo
le
an
Bit string
Integer
Real
number
Time, date
P
oi
nt
er
B
OOL
BYT
E
WO
R
D
DW
O
RD
LW
O
R
D
US
INT
UI
NT
UDI
NT
UL
INT
SI
N
T
IN
T
DI
NT
LI
N
T
R
EA
L
L
R
E
AL
T
IME
D
AT
E
T
O
D
DT
P
oi
nt
er
T
o
X
X
StartR
egister
●
Offset
●
●
GetBit
Offset
Value
●
Note:
1. The symbol
●
indicates that the parameter is allowed to connect to the variable or constant of the
data type.
2. xx of the ‘Pointer To xx’ data type includes Bit string and Integer data types.
Function Explanation
The GetBitOffsetValue instruction is used to read the value of the specified bit and the output
GetBitOffsetValue
shows the read state value. The
StartRegister
parameter is a Pointer-type variable. The
Offset
parameter specifies the offset value which regards the bit0 of the variable the
StartRegister
parameter
points to as the reference. The
GetBitOffsetValue
parameter shows the state value of the specified bit, which
is TRUE or FALSE.
If the specified offset value exceeds the range of the starting address of
StartRegister
, the operation will be
performed according to the corresponding offset address which regards the StartRegister as the starting
address.
See more in the following example.
Содержание DVP-15MC Series
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