(Fun21) - FATEK FBS Series Manual

Basic Function Instruction
FUN 21 D P
(Converts BCD data of the device specified at S into BIN and stores the result in D)
→BIN
WX WY
Range
WX0 WY0
Ope-
∣
rand
WX240 WY240
S
○
D
The decimal (BCD) data must be converted to binary (BIN) data first in order for PLC to accept the data
●
which is originally in decimal unit (BCD code) inputted from external device such as digital switch because
the BCD data can not be accepted by PLC for its operations.
Converts BCD data of the device specified at S into BIN and writes the result in D when the operation
●
control input "EN" =1 or "EN↑" (
FO0 is set to 1 and the old data of D are retained.
Constant is converted to BIN automatically when store in program and can not be used as a source
●
operand of this function.
Example
16-bit BCD to BIN conversion
Ladder diagram
X0
EN
BCD TO BIN CONVERSION
WM WS TMR CTR
WM0 WS0 T0
∣ ∣ ∣ ∣
WM1896 WS984 T255
○ ○ ○ ○
○ ○ ○ ○
P
instruction) from 0 to 1. If the data in S is not in BCD, then the error flag
21P. BIN
S : WX 0 ERR
1
R
D :
X15
↓
S WX0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0
B15
↓
D R1 0 0 0 0 0 1 0 0 1 1 1 1 0 0 1 0
HR IR OR
C0 R0 R3840 R3904
∣ ∣ ∣ ∣
C255 R3839 R3903 R3919
○ ○ ○ ○
○ ○ ○
Key operations
ORG
1 2

X0＝
6 - 3 8
Operand
S : The register to be converted
D : The register to store the converted data
(BIN code)
The S, D may combine with V, Z, P0~P9 to
serve indirect addressing
HR HSCR RTCR SR
R3920 R4096 R4128 R4136
∣ ∣ ∣
R4047 R4127 R4135 R4167
○ ○ ○
○ *
○ ○ ○
Mnemonic code
ORG
FUN
S : WX
D : R
X0
3 4
↓
B0
↓
FUN 21 D P
→BIN
ROR DR
R5000 D0
∣ ∣ ∣
R8071 D4095
○ ○ ○
○ *
○
X 0
21P
0
1