Omron CRT1 - 10-2008 Operation Manual page 27

Features of CompoNet Slave Units
Expansion Using
Expansion Units
Scaling
Last Maintenance Date
(Maintenance Function)
Cumulative Counter
Moving Average
Setting the Number of AD
Conversion Points
Rate of Change
Calculations
Comparator
Peak/Bottom Hold
Top/Valley Hold
4
One Expansion Unit can be added to a Digital I/O Slave Unit (with 2-tier termi-
nal block and 16 points). This extends the range of possible system configura-
tions by making it possible to expand to a variety of I/O combinations, e.g., 16
inputs and 8 outputs or 24 inputs (16 inputs + 8 inputs).
Converted data can be scaled to any value by the user. Ladder program cal-
culations for the Master Unit are not required if the scaling function is used
with the Slave Unit. The offset compensation function can also be used to off-
set scaled values.
These settings are made by using the CX-Integrator.
The date that maintenance was performed can be written in the Slave Unit by
using the CX-Integrator.
The cumulative counter function calculates the integral time for input (or out-
put) analog values and reads the cumulative value. Monitor values can be set
in Units. If the cumulative counter value exceeds the set monitor value, the
Cumulative Counter Monitor Flag in general status turns ON.
These values can be set and read by using the CX-Integrator.
An Analog Input Unit or Temperature Input Unit can calculate the moving aver-
age of the last eight inputs and use it as the converted data. Smooth input val-
ues can be obtained by averaging the inputs if there are rapid fluctuations in
the input.
Settings for averaging are made by using the CX-Integrator.
The conversion cycle is 4 ms max. when using all 4 analog inputs. The AD
conversion cycle can be made faster if fewer AD conversion points are used.
You can find the rate of change during the set data sampling cycle for the
input value to an Analog Input Unit or Temperature Input Unit.
The rate of change settings are made by using the CX-Integrator.
The input to an Analog Input Unit or Temperature Input Unit or the calculated
data for a Unit can be compared with alarm settings (upper upper limit, upper
limit, lower limit, and lower lower limit) and the result stored in the Analog Sta-
tus Flags. The Normal Flag (pass signal) turns ON for values that are in set
range.
The alarm settings are made by using the CX-Integrator.
The peak/bottom hold function holds the maximum (peak) or the minimum
(bottom) input value to an Analog Input Unit or Temperature Input Unit. The
maximum (peak) or minimum (bottom) value can be compared with an alarm
set value and used to turn ON an alarm flag as status data. This is called the
comparator function.
The peak/bottom hold settings are made by using the CX-Integrator.
The top/valley hold function holds the top or valley input value to an Analog
Input Unit or Temperature Input Unit. The Top/Valley Detection Timing Flag
can be used to check when top and valley values were detected. The top and
valley values can be compared with an alarm set value and used as status
data to turn ON alarm flags (comparator function).
The top/valley hold settings are made by using the CX-Integrator.
Section 1-1