Delta AH500 - Page 515

Chapter 6 Applied Instructions
6-347
API Instruction code Operand
Function
1517 RAND P
S
1
, S
2
, D
Random number
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
S
1
          
S
2
          
D
        
Pulse instruction
16-bit instruction (7 steps)
32-bit instruction
AH500
AH500
-
Symbol:
S
1
：
Minimum value Word
S
2
：
Maximum value Word
D
：
Device in which the result is stored Word
Explanation:
1. The instruction is used to generate the random number within the range between the minimum
value in S
1
and the maximum value in S
2
, and the result is stored in D.
2. If the value in S
1
is larger than the value in S
2
, the values in S
1
and S
2
are taken as the
maximum value and the minimum value respectively when the instruction is executed.
Example:
When X0.0 is ON, the random number within the range between the minimum value in D0 and the
maximum value in D10 is generated, and the result is stored in D20.
Additional remark:
The values in S
1
and S
2
should be within the range between 0 and 0~32767. If the value in S
1
or S
2
exceeds the range, the instruction is not executed, SM0 is ON, and the error code in SR0 is
16#2003.