8 Application Instructions API 100-149
DVP-PLC Application Manual
8-24
API Mnemonic
Operands
Function
111
D EZCP P
Floating Point Zone 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
*
*
*
S
*
*
*
D
*
*
*
DEZCP, DEZCPP: 17 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
: Lower bound of binary floating point
S
2
: Upper bound of binary floating point
S
: Binary floating point
comparison result
D
: Comparison result
Explanations:
1.
D
occupied 3 consecutive devices.
2.
S
1
≤
S
2
. See the specifications of each model for their range of use.
3.
S
is compared with
S
1
and
S
2
and the result (>, =, <) is stored in
D
.
4. If
S
1
or
S
2
is andesignated constant K or H, the instruction will convert the constant into a binary floating point
value before the comparison.
5. When
S
1
>
S
2
,
S
1
will be used as upper/lower bound for the comparison.
Program Example:
1. Designated device M0 and M0 ~ M2 are automatically occupied.
2. When X0 = On. DEZCP instruction will be executed and one of M0 ~ M2 will be On. When X0 = Off, EZCP
instruction will not be executed and M0 ~ M2 will remain their status before X0 = Off.
3. Use RST or ZRST instruction to clear the result.
X0
DEZCP
D0
D10
D20
M0
M1
M2
M0
On when (D1,D0) > (D21, D20)
On when (D1,D0) (D21, D20) (D11, D10)
<
<
On when (D21, D20) > (D11, D10)
Remarks:
For floating point operations, see “5.3 Handling of Numeric Values”.
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