ABB SM1000 User Manual page 88

Videographic Recorder
SM1000
Analog Input Sources only – see Section 4.6.1, page 72.
Input Signal
m 3 /sec
m 3 /hr
150
0.04167
0.0208
75
Area = total
volume of flow
0
t
1hr
The totalizer pulse rate is
proportional to the input signal.
At this point it is
0.0208 pulses per second
OR
Digital Input Sources only – see Section 4.6.1, page 72
Input Signal
On
Off
86
Units
0
1hr
Totalizer Value
Units
500
400
300
200
100
t
0
1minute 1minute
Totalizer Value
Set the required totalizer count rate and cut off value.
The count rate is determined by the maximum number of
engineering units (or pulses) per second and the smallest
totalizer increment:
engineering full scale value (rate)
------------------------------------------------------------------------- -
engineering units (in seconds)
Example – to totalize a flow with a maximum rate of 2500 liters/
3
minute (= 2.5m /minute) to the nearest 0.1m
as follows:
3
150m /hour
-------------------------------- - =
3600 seconds
The resulting value must be within the range 0.00001 to
99.99999. The totalizer increment is determined by the number
of decimal places in the 'Predetermined count' value – see page
85.
The totalizer cut off value is the lowest input value (in engineering
units) at which the totalizer is to stop counting.
2000
1000
t
Set the required totalizer count rate.
A digital totalizer pulse can be scaled to represent a value of
between 0.00001 and 1000.00000. The totalizer is then
incremented by this amount each time there is an off/on
transition.
Example – a count of 5 digital pulses with 'Count rate' set to
100 increments the totalizer from 0 to 500 in 100 unit steps.
t
4 Configuration
3
, the calculation is
0.04167 pulses/second
IM/SM1000 Issue 11