Delta AH500 - Page 469

Chapter 6 Applied Instructions
6-301
API Instruction code Operand Function
1222 D BAND P
S
1
, S
2
, S
3
, D
Deadband control
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
S
1
           
S
2
           
S
3
           
D
         
Pulse instruction
16-bit instruction (9 steps)
32-bit instruction (9 steps)
AH500 AH500 AH500
Symbol:
S
1
：
Minimum value of the
deadband
Word/Double word
S
2
：
Maximum value of the
deadband
Word/Double word
S
3
：
Input value Word/Double word
D
：
Output value Word/Double word
Explanation:
1. The minimum value of the deadband in S
1
or the maximum value of the deadband in S
2
is
subtracted from the input value in S
3
, and the difference is stored in D.
If the minimum value of the deadband in S
1
is larger than the input value in
S
3
, the minimum value of the deadband in S
1
is subtracted from the input
value in
S
3
, and the difference is stored in
D
.
If the maximum value of the deadband in S
2
is less than the input value in S
3
,
the maximum value of the deadband in S
2
is subtracted from the input value
in S
3
, and the difference is stored in D.
If the input value in S
3
is within the range between the minimum of the
deadband in S
1
and the maximum value of the deadband in S
2
, the output
value stored in
D
is 0.
If the minimum value of the deadband in S
1
is larger than the maximum value
of the deadband in S
2
, the instruction is not executed.
2. Only the 32-bit instructions can use the 32-bit counter.