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