Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 430

Temperature Input Terminals
Peak/Bottom Hold
4. When using the offset compensation option, set the offset value in the
Scaling Offset field.
5. Return to the General Tab, click the Download Button, and then click the
Reset Button to reset the Unit.
6. Click the OK Button and exit the window.
Peak/bottom hold is used to hold the maximum (peak) value or minimum (bot-
tom) value of the temperature input value. When the Hold Flag (output) allo-
cated in the OUT Area turns ON, the hold function starts, searching for the
peak or bottom value until the Hold Flag turns OFF. (The peak/bottom value is
refreshed when the Hold Flag turns OFF.) The comparator function can be
used to compare the peak or bottom values allocated as temperature data 1.
(Refer to details on the comparator function.)
Example of Bottom Hold
Hold value
Previous
value
Hold Flag
ON
Hold function starts.
Note A delay in network transmission time will occur from the time the Hold Flag
turns ON (or OFF) in the Master's ladder program until notification of the flag's
status is actually sent to the Slave. Therefore, even when the Hold Flag is ON,
the first temperature data transmitted to the Master when the CPU Unit power
is turned ON may be the data from when the Hold Flag was OFF. To collect
peak/bottom hold data using the Hold Flag at the Master, configure a ladder
Temperature input value
The bottom value
is updated.
Bottom hold value
OFF
Hold function stops.
Section 7-6
409