Panasonic FP Series Programming Manual page 387

Arithmetic instructions
F57_BDEC
Subtracts "1" from the 4-digit BCD data specified by d if the trigger EN is in the ON-state. The
Description
result is stored in d.
Example value 4322 (BCD)
Bit 15 . . 12 10 . . 8 7 . . 4 3 . . 0
d
16# BCD
Trigger: ON
Result value 4321 (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 F57_BDEC (see page 1325)
PLC types
Data types
Variable Data type
WORD
d
Operands
For
d
Error flags
No. IEC address
%MX0.900.11
R900B
%MX0.900.9
R9009
In this example, the same POU header is used for all programming languages. For an example
Example
using IL (instruction list), please refer to the online help.
POU header All input and output variables used for programming this function have been declared in the POU
header.
386
4-digit BCD decrement
0 1 0 0 0 0 1 1 0 0 1 0 0 0 1 0
4 3 2
0 1 0 0 0 0 1 1 0 0 1 0 0 0 0 1
4 3 2
Function
16-bit area for BCD data to be decreased by 1
Relay
- WY WR WL
Set
for an instant
for an instant
2
1
T/C Register
SV EV DT LD FL
If
 the calculated result is 0.
 the result exceeds the range of 4-digit
BCD data (underflow).
Constant
-