Delta DVP-SS2 User Manual

3. Instruction Set
3-415
API Mnemonic Operands Function
Controllers
ES2/EX2/
EC5
SS2
SA2
SE
SX2
121 D ESUB P Floating point subtraction
Type
OP
Bit Devices Word devices Program Steps
X Y M S K H KnX KnY KnM KnS T C D E F
DESUB, DESUBP: 13
steps
S
1
*
*
*
S
2
*
*
*
D
*
PULSE
16-bit
32-bit
ES2/EX2/
EC5
SS2
SA2
SE
SX2
ES2/EX2/
EC5
SS2
SA2
SE
SX2
ES2/EX2/
EC5
SS2
SA2
SE
SX2
Operands:
S
1
: Minuend S
2
: Subtrahend D: Subtraction result
Explanation:
1. S
1
− S
2
= D. The floating point value in S
2
is subtracted from the floating point value in S
1
and
the result is stored in D. The subtraction is conducted in binary floating point format.
2. If S
1
or S
2
is designated as constant K or H, the instruction will convert the constant into a binary
floating point value before the operation.
3. S
1
and S
2
can designate the same register. In this case, if the instruction is specified as
“continuous execution instruction” (generally DESUBP instruction) and the drive contact is ON,
the register will be subtracted once in every scan.
4. Flags: M1020 (Zero flag), M1021 (Borrow flag) and M1022 (Carry flag)
If absolute value of the result exceeds max. floating point value, carry flag M1022 = ON.
If absolute value of the result is less than min. floating point value, borrow flag M1021 = ON.
If the conversion result is 0, zero flag M1020 = ON.
Program Example 1:
When X0 = ON, binary floating point value (D1, D0) minuses binary floating point value (D3, D2) and
the result is stored in (D11, D10).
D0
DESUB
X0
D2
D10
Program Example 2:
When X2 = ON, K1234 (automatically converted into binary floating point value) minuses binary
floating point (D1, D0) and the result is stored in (D11, D10).
K1234
DESUB
X2
D0 D10

Delta DVP-SS2 Specifications

General

Brand	Delta
Model	DVP-SS2
Category	Controller
Language	English