Delta AH500 - Page 218

AH500 Programming Manual
6-13
API Instruction code Operand
Function
0024~
0029
D
FAND※ S
1
, S
2
Comparing the floating-point
numbers
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
S
1
          
S
2
          
Pulse instruction 32-bit instruction (5-7 steps) 64-bit instruction (5-7 steps)
-
AH500
AH500
Symbol:
Taking FAND= and DFAND= for example
S
1
：
Data source 1 Double word/Long word
S
2
：
Data source 2 Double word/Long word
Explanation:
1. The instructions are used to compare the value in S
1
with that in S
2
, and the values
compared are floating-point numbers. Take the instruction FAND= for example. When the
comparison result is that the value in S
1
is equal to that in S
2
, the condition of the instruction
is met. When the comparison result is that the value in S
1
is not equal to that in S
2
, the
condition of the instruction is not met.
API
number
32-bit
instruction
64-bit
instruction
Comparison operation result
ON
OFF
0024
FAND＝ DFAND＝ S
1
＝S
2
S
1
≠S
2
0025
FAND＜＞ DFAND＜＞
S
1
≠S
2
S
1
＝S
2
0026
FAND＞ DFAND＞ S
1
＞S
2
S
1
≦S
2
0027
FAND＞＝ DFAND＞＝ S
1
≧S
2
S
1
＜S
2
0028
FAND＜ DFAND＜ S
1
＜S
2
S
1
≧S
2
0029
FAND＜＝ DFAND＜＝ S
1
≦S
2
S
1
＞S
2
Example:
Take the instruction FAND＝ for example. When X1.0 is ON and the value in D1 is equal to that in
D2, Y1.0 is ON.
Additional remark:
1. If the value in S
1
or S
2
exceeds the range of values which can be represented by the
floating-point numbers, the contact is OFF, SM is ON, and the error code in SR0 is 16#2013.