Arithmetic instructions
378
Part III FP Instructions
F47_BSUB2
4-digit BCD subtraction, destination can be specified
15 . . 12 10 . . 8 7 . . 4 3 . . 0
0 0 1 6
0 0 0 4
0 0 1 2
s1
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 1
0 0 0 1
0 1 1 0
16# (BCD)
15 . . 12 10 . . 8 7 . . 4 3 . . 0
s2
0 1 0 0
16# (BCD)
15 . . 12 10 . . 8 7 . . 4 3 . . 0
d
0 0 1 0
16# (BCD)
Bit
Result value 16#12 (BCD)
Bit
Bit
Trigger: ON
Example value 16#4 (BCD)
Example value 16#16 (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 F47_BSUB2 (see page 1325)
Variable Data type Function
s1 WORD minuend, 16-bit area for 4-digit BCD data or equivalent
constant
s2 WORD subtrahend, 16-bit area for 4-digit BCD data or equivalent
constant
d WORD result, 16-bit area for 4-digit BCD data
Description
Subtracts the 4-digit BCD equivalent constant or 16-bit area for 4-digit BCD data specified by s2
from the 4-digit BCD equivalent constant or 16-bit area for 4-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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