Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 426)

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”.