Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 437

Temperature Input Terminals
Rate of Change
Calculation
Setting Using the DeviceNet Configurator
1,2,3...
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The rate of change can be obtained for each sampling cycle set for the tem-
perature input data. This function calculates the difference between each set
sampling cycle and value obtained in the previous cycle. The sampling cycle
can be set between 250 ms and 65,500 ms in 250-ms increments. The default
setting for the sampling cycle is 250 ms.
Temperature
input value
Rate of
change
Note If the sampling cycle is set to a small value, the rate of change will be sensitive
to small changes. If the temperature data is subject to minute fluctuations, and
the sampling cycle is shorter than the cycle of fluctuation, the fluctuation will
be regarded as the rate of change. To prevent this occurring, use moving
average processing, which will set a longer sampling cycle.
Fluctuation in the
temperature input value
Short sampling cycle
1. Double-click the icon of the Temperature Input Terminal to be set in the
Main Window and open the Edit Device Parameters Window. (From the
Maintenance Mode Window, click the right mouse button over the Slave
icon and select Parameters and Edit.)
Temperature data
Derivative data
Desired gradient
Long sampling cycle
Section 7-6
Time
0