Delta VFD11AMS21AFSHA, User Manual

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Chapter 16 PLC Function Applications

MS300
(High Speed Model)
16-69
API
ESUB
Subtraction of binary floating point numbers
121
D P
Bit device Word device
16-bit command
－ － － －
32-bit command (13 STEP)
DESUB Continuous
execution type
DESUBP Pulse
execution type
Flag signal: none
X Y M K H KnX KnY KnM T C D
S1 ＊ ＊ ＊
S2
＊ ＊ ＊
D
＊
Notes on operand usage:
Please refer to the function specifications table for each device in
series for the scope of device usage

S
1
: minuend.
S
2
: subtrahend.
D
: difference.
 When the content of the register designated by
S
2
is subtracted from the content
of the register designated by
S
1
, the difference will be stored in the register
designated by
D
; subtraction is performed entirely using binary floating-point
numbers.

If the source operand S
1
or
S
2
designates a constant K or H, the command will
transform that constant into a binary floating point number for use in subtraction.

In the situation when S
1
and
S
2
designate identical register numbers, if a
"continuous execution" command is employed, when conditional contact is On,
the register will perform addition once during each scan. Pulse execution type
commands (DESUBP) are generally used under ordinary circumstances.

When X0=On, a binary floating point number (D1, D0) will be subtracted to a
binary floating point number (D3, D2), and the results stored in (D11, D10).
X0
DESUB
D0
D2
D10
 When X2 =On, the binary floating point number (D1, D0) will be subtracted from
K1234 (which has been automatically converted to a binary floating-point
number), and the results stored in (D11, D10).
X2
DESUB
D0 K1234 D10