Delta VP3000 Series - Page 387

Chapter 7 Second Development Platform VP3000
378
API Instruction code Operand Function
275–280 D
FLD※
S
1
, S
2
Floating-point number contact type
comparison LD※
Type
Operand
Bit devices Word devices
16-bit instruction
- -
- -
32-bit instruction (9 steps)
FLD※
Continuous
execution
type
- -
Associated flag: none
X Y M K H KnX KnY KnM T C D
S
1
  
S
2
  
Caution for using operand: ＃ : & | ^
 See the specification of each model for the scope of device’s usage.
Description
 S
1
: source device 1
S
2
: source device 2
 This instruction compares the content in S
1
and S
2
. Take “FLD=” as an example, if the result is
“equal to”, the continuity of the instruction is enabled; if the result is “not equal to”, the
continuity of the instruction is disabled.
 Use FLD※ instruction, users can execute operation directly by inputting floating-point value
(e.g. F1.2) in S
1
, S
2
or storing floating-point value in the register D.
 The instruction is used for direct connection with busbar
API No. 32-bit instruction
Continuity
condition
Discontinuity
condition
275 FLD=
S
1
= S
2
S
1
≠ S
2
276 FLD>
S
1
> S
2
S
1
 S
2
277 FLD<
S
1
< S
2
S
1
 S
2
278 FLD<>
S
1
≠ S
2
S
1
= S
2
279 FLD<=
S
1
 S
2
S
1
> S
2
280 FLD>=
S
1
 S
2
S
1
< S
2
Example
 When the floating-point value in D200 (D201) ≤ F1.2 and X1 is ON, then Y21 is being triggered
and hold.
FLD<=
D200 F1.2
X1
SET
Y21