Eaton ELC-PB, Programming Manual

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3 . I n s t r u c t i o n S e t
M N050 03003E F or mo re infor ma tio n vi sit:
w w w. e a t o n . c o m
3-53
API Mnemonic Operands Function
11 D ZCP P
S1, S2, S, D
Zone Compare
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 * * *
ZCP, ZCPP: 9 steps
DZCP, DZCPP: 17 steps
ELC ELCB ELCM
PB PC/PA/PH PV PB PH/PA
32 16 P 32 16 P 32 16 P 32 16 P 32 16 P
Operands:
S
1
: First comparison value (Minimum)
S
2
: Second comparison value (Maximum)
S
: Comparison value
D
: Comparison result result (starting bit address – uses 3 consecutive bit
addresses)
Description:
1.
S
is compared with the lower limit,
S
1
and the upper limit
S
2
and
D
contains the compare result.
2. The values are binary values. If bit 15=1 in 16-bit instruction or bit 31=1 in 32-bit instruction,
the comparison will regard the value as a negative binary value.
3. If operand
S
1
,
S
2
,
S
use index register F, only a 16 bit compare is available.
4. Operand
S
1
should be less than Operand
S
2,
Operand
D
occupies 3 continuous addresses.
Program Example:
1. If
D
is set to M0, then M0, M1, M2 will display the result of the ZCP as shown below.
2. When X0=ON, ZCP instruction is evaluated and one of M0, M1 or M2 will be ON. When
X0=OFF, ZCP instruction is not evaluated and M0, M1, M2 remain in the previous status.
X0
M0
M1
M2
ZCP
If C10 < K10, M0 = On
If
K10 < C10 < K100, M1 = On
If C10 > K100, M2 = On
X0
K10 C10 M0 K100
= =
3. Use RST or ZRST instructions to reset the comparison result.