Omron CRT1 - 10-2008 Operation Manual page 344

Overview of Temperature Input Units
Selecting Allocation Data
Flow of Data in
Temperature Input Units
• Scaling to user-specified industrial units
• Moving average processing
Processed data can be allocated as I/O in the Master Unit.
The following math operations can be performed on temperature input values
that have undergone the above processing.
• Peak/hold operation
• Top/valley operation
• Rate of change calculations
• Cumulative operation
The values after processing are called peak value, bottom value, top value,
valley value, rate of change, and cumulated value.
Math operations are performed according to the following flowchart.
Input
Moving
average
A
Top/Valley
Peak/Bottom
Peak Top
value 2 value 4
Bottom Valley
value 3 value 5
Hold Flag
Data Flow
Selection
After performing math operations, select the data to be allocated to I/O in the
Master Unit from the following six values: temperature input value, peak value,
bottom value, top value, valley value, and rate of change. The selected data
will be Temperature Data 1, and can be allocated in the Master Unit alone or
in combination with Status Flags. The data is selected using the CX-Integrator
or explicit messages.
Comparison with four alarm set values, HH, H, L, and LL can be performed for
Temperature Data 1. This is called the comparator function.
In a Temperature Input Unit, it is possible to switch the display mode of the
data selected from the six values. The Display Mode can be the Normal Dis-
play Mode or the 1/100 Display Mode. The data can be allocated in either
mode for Temperature Data 1.
Scaling
Cumulated
Rate of change
value
Rate of change Cumulated
value 6 value
Top/Valley detection timing
(allocated I/O data)
Conversion
Allocated
processing
I/O data
Section 7-2
A
Analog or
Temp. input
value 1
Processing
results
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