Calculating The Totalizer Count Rate Manually - ABB ControlMaster CM30 User Manual

ControlMaster CM30, CM50 and CMF310
Universal process controllers,

7.7.1 Calculating the Totalizer Count Rate Manually

Analog Mode
Eng Hi (of source) x volume unit conversion
Count Rate =
Example:
Eng Hi = 2500 l/m.
3
increment in m .
Volume unit conversion: 1 l = 0.001 m
Source time units = minutes, count rate units = seconds.
Time unit conversion: 1 min = 60 s.
2500 x 0.001
Count Rate =
If the input source is at a fixed rate of 2500 l/min, the totalizer increments at 0.04167 m
If the input source is reduced to a fixed rate of 1250 l/min, the totalizer increments at:
1250
x 0.04167 = 0.0208 m
2500
Digital Mode
The count rate setting determines the scaling of the digital input pulses.
For example, with a Count Rate = 100 totalizer units / pulse, 5 digital input pulses increment the totalizer
from 0 to 500 in 100 unit steps:
Input Signal
On
Off
74
1 1
/ , / DIN and fieldmount
4 2
time unit conversion
Totalizer required to
3
.
= 0.04167 m
60
3
.
1 Minute
3
/s
t 0
Totalizer Value
7 Advanced Level
3
/s.
Units
500
400
300
200
100
t
1 Minute
IM/CM/ED–EN Rev. X