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
S1 * * *
S2 * * *
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:
S1: 1st comparison value S2: 2nd comparison value D: Comparison result, 3 consecutive
devices
Explanations:
1. The data of S1 is compared to the data of S2 and the result (＞, ＝, ＜) is indicated by three bit
devices in D.
2. If the source operand S1 or S2 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)