Delta AH500 Programming Manual page 470

AH 5 00 Pr ogr am m ing Ma n ua l
3. The figures:
BAND is not exec uted.
Output value
4. The minimum value of the deadband in S
input value in S , and the output value in D should be within the range described below.
3

If the instruction BAND is executed, the minimum value of the deadband in S
maximum value of the deadband in S
within the range between -32768 and 32767. Suppose the minimum value of the
deadband in S
output value in D is calculated as follows.
Output value in D=-32768-10=16#8000-16#000A=16#7FF6=32758

If the instruction DBAND is executed, the minimum value of the deadband in S
maximum value of the deadband in S
within the range between -2147483648 and 2147483647. Suppose the minimum value of
the deadband in (S
is -2147483648. The output value in (D+1, D) is calculated as follows.
Output value in (D+1, D)
=-2147483648-1000=16#80000000-16#000003E8=16#7FFFFC18
=2147482648
Example 1:
When X0.0 is ON, -1000 or 1000 is subtracted from the binary-coded decimal value in X1, and the
difference is stored in D1.
The execution results:
Minimum Maximum
value of the value of the
deadband deadband
-1000 1000
6 - 3 0 2
T he lower l imit value
of the deadband
Input value
, the maximum value of the deadband in S
1
, the input value in S
2
is 10 and the maximum value of the deadband in S
1
, the input value in S
2
+1, S ) is 1000 and the maximum value of the deadband in (S
1 1
Input value in
D0
-1200
1200
500
BAND is exec uted.
Output value
T he upper li mit value
of the deadband
, and the output value in D is
3
, and the output value in D is
3
Function
D0<-1000=>D1=D0-(-1000)
D0>1000=>D1=D0-1000
-1000≦D0≦1000=>D0=0
Input value
, the
2
, the
1
is -32768. The
3
, the
1
+1, S )
3 3
Output value
in D1
-200
200
0