3. Instruction Set
3-295
API Mnemonic Operands Function
110
D ECMP P
Floating point compare
Controllers
ES2/EX2 SS2 SA2
SE
SX2
Bit Devices Word devices Program Steps Type
OP
X Y M S K H KnX KnY KnM KnS T C D E F
S
1
* * *
S
2
* * *
D * * *
DECMP, DECMPP: 13
steps
PULSE 16-bit 32-bit
ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2
Operands:
S
1
: 1
st
comparison value S
2
: 2
nd
comparison value D: Comparison result, 3 consecutive
devices
Explanations:
1. The data of S
1
is compared to the data of S
2
and the result (＞, ＝, ＜) is indicated by three bit
devices in D.
2. If the source operand S
1
or S
2
is specified as constant K or H, the integer value will
automatically be converted to binary floating point for comparison.
Program Example:
1. If the specified device is M10, M10~M12 will automatically be used.
2. When X0 = ON, one of M10~M12 will be ON. When X0 = OFF, DECMP is not executed,
M10~M12 will retain their previous state before X0 = OFF.
3. Connect M10~M12 in series or parallel for achieving the results of ≧, ≦, ≠.
4. RST or ZRST instruction is required if users need to reset the comparison result.
X0
DECMP D0 D100 M10
M10
M11
M12
M10 = ON when (D1,D0)>(D101,D100)
M11 = ON when (D1,D0)=(D101,D100)
M12 = ON when (D1,D0)<(D101,D100)
