Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 448

Temperature Input Terminals
Cumulative Counter
Setting Using the DeviceNet Configurator
1,2,3...
3. Return to the General Tab, click the Download Button, and then click the
Reset Button to reset the Unit.
4. Click the OK Button and exit the window.
The cumulative counter integrates the temperature input value over time to
determine the amount of heat endured by a sensor or device. calculates a
time integral of analog input values over time. The cumulative value can be
calculated in hours ( ° C × hours or ° F × hours) or minutes ( ° C × minutes or ° F ×
minutes).
For example, when the units are set to hours, a cumulative value of 100 hours
indicates a temperature value equivalent to 100 ° C continuing for one hour.
The value stored in the four-byte area (two words) is the integral value for 300
time divisions. The data is displayed according to the set conditions. (See
notes 1 and 2.)
Monitor values can also be set in the Unit. When the cumulated count value
exceeds the set monitor value, the Cumulative Counter Flag in the area for
Generic Status Flags turns ON.
1. When ° F units are selected, the integration is performed on the ° F values.
Note
2. Even if the 1/100 display mode is selected, the integration is performed on
the original ( × 100) temperature values.
3. The meaning of the integral value depends on the decimal point position
for the temperature values.
Temperature
input value
Note The following table shows the time divisions and number of measurements.
Units
Hours
Minutes
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.)
Integral value
( ° C × hours or ° C × minutes)
Time division
(See note.)
Time division
12 seconds
200 ms
Section 7-6
Time
Number of measurements
300
300
427