6. BASIC INSTRUCTIONS
6 − 1
MELSEC-A
6. BASIC INSTRUCTIONS
The basic instructions are instructions which are capable of handing numeric data
expressed in 16 bits and 32 bits, and are classified into the following instructions.
Classification of Basic Instructions Description Ref. Page
Comparison operation instruction Comparison such as =, >, and < 6-2
Arithmetic operation instruction
Addition subtraction, multiplication,
and division in BIN and BCD.
INC, DEC
6-8
BCD ↔ BIN conversion instruction
Conversion from BCD to BIN and
from BIN to BCD
6-38
Data transfer instruction Transfer of specified data 6-46
Program branch instruction Jump, call, interrupt enable/disable 6-58
Program switching instruction Switching between main and subprogram 6-70
Refresh instruction Data link refresh and I/O partial refresh 6-83
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