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 N 0 5 0 0 3 0 0 3 E F o r m o r e i n f o r m a t i o n v i s i t : w w w. e a t o n . c o m
3 - 3 0 1
API Mnemonic Operands Function
120 D EADD P S
1
, S
2
, D Floating Point Addition
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 *
DEADD, DEADDP: 13
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
: Augend S
2
: Addend D : Addition result
Description:
1. S
1
+
S
2
=
D . The floating point value in the registers specified by S
1
and S
2
are added together
and the result is stored in the registers specified by D .
2. If the source operand S
1
or S
2
is a constant K or H, the integer value will automatically be
converted to binary floating point to perform the addition operation.
3. S
1
and S
2
can specify the same register number (the same address can be used for S
1
and
S
2
).
4. This instruction works best when used as a pulse instruction (EADDP).
5. Flags: M1020 (Zero flag), M1021 (Borrow flag) and M1022 (Carry flag)
If the absolute value of the result is larger than the maximum floating point value, the carry flag
M1022= ON.
If absolute value of the results is less than the minimum floating point value, the borrow flag
M1021= ON.
If the conversion result is 0, zero flag M1020= ON.
Program Example 1:
When X0= ON, add the binary floating point value in D1/D0 and the binary floating point value in D3
/D2 and store the result in D11/D10.
D0 DEADD
X0
D2 D10
Program Example 2:
When X2= ON, add the binary floating point value of D11/D10 and K1234 (automatically converted
to binary floating point) and store the result in D21/D20.
D10 DEADD
X2
K1234 D20