Arithmetic instructions
376
Part III FP Instructions
F46_DBSUB
8-digit BCD subtraction
31 . . 28 27 . . 24 23 . . 20 19 . . 16
15 . . 12 10 . . 8 7 . . 4 3 . . 0
d
0 0 1 0 0 0 1 1 0 0 0 1 0 0 0 1
0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0
16# BCD
31 . . 28 27 . . 24 23 . . 20 19 . . 16
15 . . 12 10 . . 8 7 . . 4 3 . . 0
s
0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1
16# BCD
31 . . 28 27 . . 24 23 . . 20 19 . . 16
15 . . 12 10 . . 8 7 . . 4 3 . . 0
d
0 0 1 0 0 0 1 1 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1
16# BCD
2 3 2 1 0 0 4 4
0 0 2 1 0 0 1 1
2 3 0 0 0 0 3 3
Bit
Trigger: ON
Bit
Example value 16#00210011 (BCD)
32-bit area
Bit
Example value 16#23210044 (BCD)
Result value 16#23000033 (BCD)
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 F46_DBSUB (see page 1325)
Variable Data type Function
s DWORD subtrahend, 32-bit area for 8-digit BCD data or equivalent
constant
d DWORD minuend and result, 32-bit area for 8-digit BCD data
For Relay T/C Register Constant
s DWX DWY DWR DWL DSV DEV DDT DLD DFL dec. or hex.
d - DWY DWR DWL DSV DEV DDT DLD DFL -
Description
Subtracts the 8-digit BCD equivalent constant or 8-digit BCD data specified by s from the 8-digit
BCD data specified by d if the trigger EN is in the ON-state. The result is stored in d.
Data types
Operands
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