F348_FBAND

The function compares the input value at input s3_In with a deadband whose lower limit is specified at input s1_Min and whose upper limit is specified at s2_Max. The result of the function is returned at output d as follows:

Parameters

Input

s1_Min (REAL)

the area where the lower limit is stored or the lower limit data

s2_Max (REAL)

the area where the upper limit is stored or the upper limit data

s3_In (REAL)

the area where the input value is stored or the input value data

Output

d (REAL)

the area where the output value data is stored

Remarks

• Instead of using this F instruction, we recommend using the corresponding FP7 instruction: FP_BAND

• If the input value at input s3 < s1, the lower limit at input s1 is subtracted from the input value at s3, and the result is stored as the output value at d.

• If the input value at input s3 > s2, the upper limit at input s2 is subtracted from the input value at s3, and the result is stored as the output value at d.

• If the input value at s2 ³ s3 ³ s1, 0 is returned as the output value at d.

  

  1.  (1) output value d
  2.  (2) input value s3_In
  3.  (3) upper limit of deadband s2_Max
  4.  (4) in this range, zero is output
  5.  (5) lower limit of deadband s1_Min

Error flags

sys_bIsOperationErrorHold (turns to TRUE and remains TRUE)

if the values at inputs s1_Min, s2_Max, and s3_In are not REAL numbers or the value at s1_Min > s2_Max.

sys_bIsOperationErrorNonHold (turns to TRUE for one scan)

if the values at inputs s1_Min, s2_Max, and s3_In are not REAL numbers or the value at s1_Min > s2_Max.

sys_bIsEqual (turns to TRUE and remains TRUE)

if the result is 0.