Arithmetic instructions
380
Part III FP Instructions
F48_DBSUB2
8-digit BCD subtraction, destination can be specified
31 . . 28 27 . . 24 23 . . 20 19 . . 16 15 . . 12 10 . . 8 7 . . 4 3 . . 0
s1
0 0 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 0 1 0 0 0
16# BCD
31 . . 28 27 . . 24 23 . . 20 19 . . 16 15 . . 12 10 . . 8 7 . . 4 3 . . 0
s2
0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0
16# BCD
31 . . 28 27 . . 24 23 . . 20 19 . . 16 15 . . 12 10 . . 8 7 . . 4 3 . . 0
d
0 0 1 1 0 0 1 1 0 1 0 0 0 1 0 0 0 1 0 1 0 1 0 1 0 1 1 0 0 1 1 0
16# BCD
3 35 5 5 58 8
0 01 1 0 02 2
3 34 4 5 56 6
Trigger: ON
Bit
Example value 16#00110022 (BCD)
Bit
32-bit area
Example value 16#33555588 (BCD)
Bit
Result value 16#33445566 (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 F48_DBSUB2 (see page 1325)
Variable Data type Function
s1 DWORD minuend, 32-bit area for 8-digit BCD data or equivalent
constant
s2 DWORD subtrahend, 32-bit area for 8-digit BCD data or equivalent
constant
d DWORD result, 32-bit area for 8-digit BCD data
Description
Subtracts the 8-digit BCD equivalent constant or 8-digit BCD data specified by s2 from the 8-digit
BCD equivalent constant or 8-digit BCD data specified by s1 if the trigger EN is in the ON-state.
The result is stored in d.
Data types
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