Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 369

Analog Input Terminals
Comparator
348
3. To set the sampling cycle, click the Rate of Change Tab and input the de-
sired value for the sampling cycle in the Sampling Rate field.
4. Return to the General Tab, click the Download Button, and then click the
Reset Button to reset the Unit.
5. Click the OK Button and exit the window.
When the High High Limit, High Limit, Low Low Limit, and Low Limit are set in
the Slave, a flag will turn ON when a value exceeds the setting range. The
four set values are High High Limit (HH), High Limit (H), Low Low Limit (LL),
and Low Limit (L), and the values are compared with those in Analog Data 1.
(The comparator function cannot be used with Analog Data 2.) When each of
these values is exceeded, the Comparator Result Flag in the area for Analog
Status Flags turns ON. If an alarm does not occur, the Normal Flag (pass sig-
nal) turns ON.
Set values
Comparator Result Flag
(in Analog Status Flags)
ON/OFF
Note When the analog input value changes faster than the conversion cycle, the
High Limit alarm may turn ON without the Normal Flag (pass signal) turning
ON for the Low Limit alarm. Configure ladder programs to prevent this occur-
ring.
HH
H
L
LL
HH alarm
H alarm
Normal Flag
(Pass signal)
L alarm
LL alarm
Section 7-4