Mitsubishi Electric MELSEC-Q00U(J)CPU

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APPENDICES
A
Appendix 4 Data Used in Sequence Programs
(1) Inputting numeric values externally to the CPU module
When setting a numeric value to the CPU module externally using a digital switch, BCD (binary-coded decimal)
can be used as DEC (decimal) by the method given below.
(a) Numeric values used inside the CPU module
The CPU module performs program operations in binary.
If the value set in binary-coded decimal is used without conversion, the CPU module performs program
operations regarding the set value as binary.
Therefore, the program operations are not performed correctly.
(b) Using any numeric data regardless of the data type
To convert the data set in binary-coded decimal into binary, which can be used in the CPU module, use the BIN
instruction.
The BIN instruction allows the CPU module to use any external numeric data regardless of the data type.
For details of the BIN instruction, refer to the following.
MELSEC-Q/L Programming Manual (Common Instruction)
(2) Outputting numeric values externally from the CPU module
When externally displaying numeric values operated in the CPU module, a digital indicator can be used.
(a) Outputting numeric values
The CPU module performs program operations in binary.
If the binary values used in the CPU module are output to a digital indicator, the indicator does not show the
values correctly.
To convert the data set in binary into binary-coded decimal, which can be used in the external indicator, use the
BCD instruction.
The BCD instruction allows the external indicator to display values in decimal.
For details of the BCD instruction, refer to the following.
MELSEC-Q/L Programming Manual (Common Instruction)
[Setting numeric data]
Digital switch
XF X0to
4321
CPU module
Input data in BCD.
BIN data
BINP K4X0 D0
BCD D5 K4Y30
[Setting numeric data]
Digital indicator
Y3F Y30to
CPU module
Output data
in BCD.
BIN data
BINP K4X0 D0
BCD D5 K4Y30