Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 425)

8 Application Instructions API 100-149
DVP-PLC Application Manual 8-23
API Mnemonic Operands Function
110 D ECMP P
Floating Point Compare
Controllers
ES/EX/SS SA/SX/SC EH/SV
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
ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV
Operands:
S
1
: Binary floating point comparison value 1 S
2
: Binary floating point comparison value 2 D: Comparison
result
Explanations:
1. D occupies 3 consecutive devices.
2. See the specifications of each model for their range of use.
3. The binary floating point values S
1
and S
2
are compared with each other. The comparison result (>, =, <) is
stored in D.
4. If S
1
or S
2
is an designated constant K or H, the instruction will convert the constant into a binary floating point
value before the comparison.
Program Example:
1. Designated device M10 and M10 ~ M12 are automatically occupied.
2. When X0 = On. DECMP instruction will be executed and one of M10 ~ M12 will be On. When X0 = Off, DECMP
instruction will not be executed and M10 ~ M12 will remain their status before X0 = Off.
3. To obtain results , , ≠ ≧ ≦ , serial-parallel M10 ~ M12.
4. Use RST or ZRST instruction to clear the result.
X0
DECMP D0 D100 M10
M10
M11
M12
On when (D1,D0)>(D101,D100)
On when (D1,D0)=(D101,D100)
On when (D1,D0)<(D101,D100)
Remarks:
For floating point operations, see “5.3 Handling of Numeric Values”.