West Control Solutions KS98-1 - Manual (Page 122)

III-5.6 MEAN (mean value formation (No. 75))
General
Function MEAN forms the floating, arithmetic mean value of the number ( ValNo) of the values detected last at input
x1 for output at output y1.
The interval between the individual samplings (interval) is adjustable with
Sample and Unit.
Unit is used to specify the measurement interval (sec = seconds, min = minutes or h = hours).
Sample is used to specify the number of ‘Unit` intervals for measurement.
+ With the sample input wired, the adjusted sample and unit parameter are ineffective.
Only the sample-pulse is used
Example 1: mean value of the past minute with sampling per second.
Sample = 1 and Unit = sec r value sampling per second.
ValNo = 60 r the past 60 values form the mean value (1 minute).
Example 2: mean value of the past day with sampling per hour.
Sample = 1 and Unit = h r value sampling per hour.
ValNo = 24 r the past 24 values for the mean value (1 day).
Example 3: mean value of the past day with sampling per quarter of an hour.
Sample = 15 and Unit = min r value sampling at intervals of 15 minutes.
ValNo = 96 r the past 96 values form the mean value (1 day).
+ If the sample input is wired, sampling is triggered by a positive flank at this input.
The adjusted sampling interval is invalid.
disabl = 1 interrupts the sampling, reset = 1 deletes the mean value.
Internal calculation:
The number of input values entered in
ValNo is stored, totalized and divided by the number.
y
value value value value n
n
1
1 2 3
=
+ + + _ _ _ ... _
Example: ValNo = 5
11 24 58 72 12
y1
11 24 58 72 12
5
35 4
=
+ + + +
=
_ ,
9499-040-82711 Signal converters
MEAN (mean value formation (No. 75)) III-122
x1
reset
disabl
sample
Unit
ValNo
Sample
]
ValNo
ready
Mean