Delta Electronics AH500, Manual

Page: 192 / 547

C h a p t e r 5 A p p l i e d I n s t r u c t i o n s
5 - 7 7
API Instruction code Operand Function
111 D EZCP P S
1
, S
2
, S, D
Binary floating-point
zonal comparison
Device X Y M S K 16# F KnM KnS D W T C V Z
S
1
  
S
2
  
S
  
D
  
Pulse instruction 16-bit instruction 32-bit instruction (12 steps)

–

E xp la nat io n

S
1
: Minimum binary floating-point value; S
2
: Maximum binary
floating-point value; S : Binary floating-point value; D : Comparison result
(D occupies three consecutive devices.)

The instruction is used to compare the binary floating-point value in S
with that in S
1
, and compare the binary floating-point value in S with that
in S
2
. The comparison result is stored in D .

If S
1
is a floating-point number, the instruction will be used to compare
the floating-point number with the binary floating-point value in S
2
. If S
2
is
a floating-point number, the instruction will be used to compare the
binary floating-point value in
S
1
with the floating-point number.

If the binary floating-point value in S
1
is greater than that in S
2
, the binary
floating-point value in S
1
will be taken as the maximum/minimum value
during the execution of the instruction EZCP.
E xa mple

When X0.0 is ON, the instruction DEZCP is executed, and M0, M1, or
M2 is ON. When X0.0 is OFF, the execution of the instruction DEZCP
stops, and the states of M0, M1, and M2 remain unchanged
.

If the operand D is M0, M0, M1, and M2 will be occupied automatically.

If users want to reset M0, M1, or M2, they can use the instruction RST or
ZRST.
X0.0
DEZCP D0 D10 D20
M0
M1
M2
If the value in ( D1, D0) >the value in (D 21, D20) , M0 will be O N.
If the value in ( D1, D0) <the value in (D 21, D20) < the value in (D11, D 10),
M1 w ill be O N .
If the value in ( D21, D20) >the v alue in (D 11, D 10), M2 wi ll be ON .
M0
A dditio nal

re m ark
Please refer to section 5.3 for more information about performing
operations on floating-point numbers.