Arithmetic instructions
435
Part III FP Instructions
F288_DBAND
32-bit data deadband control
If the input value at input s3 < s1, the lower limit at input s1 is subtracted from
the input value at s3, and the result is stored as the output value at d.
If the input value at input s3 > s2, the upper limit at input s2 is subtracted from
the input value at s3, and the result is stored as the output value at d.
If the input value at s2 s3 s1, 0 is returned as the output value at d.
0
Lower limit of
deadband s1
Input value s3
Output value d
Upper limit of deadband s2
In this range, zero is output
This instruction also exists as a P instruction (for FP2/2SH, FP3/5, FP10/10SH PLC types), which
is only executed at the rising edge of the EN trigger. Select [Insert P instruction] from the
"Instructions" pane if you require a P instruction. To facilitate reuse, the instruction then appears
under "Recently used" in the pop-up menu. Press <Ctrl>+<Shift>+<v> within the programming
area to open the list of recently used elements.
PLC types
Availability of F288_DBAND (see page 1323)
Variable Data type Function
s1 the area where the lower limit is stored or the lower limit data
s2 the area where the upper limit is stored or the upper limit
data
s3 the area where the input value is stored or the input value
data
d
ANY32
the area where the output value data is stored
For Relay T/C Register Constant
s1, s2, s3 DWX DWY DWR DWL DSV DEV DDT DLD DFL dec. or hex.
d - DWY DWR DWL DSV DEV DDT DLD DFL -
Description
The function compares the input value at input s3 with a deadband whose lower limit is specified at
input s1 and whose upper limit is specified at s2. The result of the function is returned at output d
as follows:
Data types
Operands
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