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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
9 Move and Compare – FNC 10 to FNC 19
9.9 FNC 18 – BCD / Conversion to Binary Coded Decimal
1
Introduction
2
Overview
3
Instruction
List
4
Devices
in Detail
5
Specified the
Device &
Constant
6
Before
Programming
7
Basic
Instruction
8
FNC00-FNC09
Program Flow
9
FNC10-FNC19
Move & Compare
10
FNC20-FNC29
Arith. & Logic
Operation
2. 32-bit operation (DBCD and DBCDP)
This instruction converts the binary (BIN) data of [ +1, ] into binary-coded decimal (BCD) data, and
transfers the converted BCD data to [ +1, ].
• The data of [ +1, ] can be converted if it is within the range from K0 to K99999999 (BCD).
• The table below shows digit specification for [ +1, ] and [ +1, ].
Related instruction
Cautions
1. When using SEGL (FNC 74) or ARWS (FNC 75) instruction
Because conversion between binary-coded decimal data and binary data is automatically executed in SEGL (FNC 74)
and ARWS (FNC 75) instructions, BCD instruction is not required.
2. Handling of BCD inputs and outputs
Binary data is used in all operations in PLCs including arithmetic operations (+, −, × and ÷), increment and decrement
instructions.
• When receiving the digital switch information in the binary-coded decimal (BCD) format into a PLC, use BIN (FNC
19) instruction for converting BCD data into binary data.
• When outputting data to the seven-segment display unit handling binary-coded decimal (BCD) data, use BCD (FNC
18) instruction for converting binary data into BCD data.
Errors
In BCD or BCDP (16-bit type) instructions, an operation error occurs when the value is outside the range from
0 to 9999.
In DBCD or DBCDP (32-bit type) instructions, an operation error occurs when the value is outside the range
from 0 to 99,999,999.
[+1,]
Number of digits Data range
K1Y000 1 0 to 9
K2Y000 2 00 to 99
K3Y000 3 000 to 999
K4Y000 4 0000 to 9999
K5Y000 5 00000 to 99999
K6Y000 6 000000 to 999999
K7Y000 7 0000000 to 9999999
K8Y000 8 00000000 to 99999999
Instruction Function
BIN (FNC 19) Converts binary-coded decimal (BCD) data into binary (BIN) data.
S
S
D
D
S
S
S
S
D
D
FNC 18
DBCD
When "K8Y000" is specified
S
D
Command
input
PLC
DBCD (FNC 18)
Y034 Y030 Y024 Y020 Y014 Y010 Y004 Y000
Y037 Y033 Y027 Y023 Y017 Y013 Y007 Y003
BIN
BCD
……………………
D D
S
S