Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 370

Analog Input Terminals
Setting Hysteresis
OFF Delay
Setting Using the DeviceNet Configurator
1,2,3...
The Comparator Result Flag turns OFF when the value is lower than the hys-
teresis width (H or HH alarm occurs) or exceeds it (L or LL alarm occurs), as
shown in the following diagram. If the analog value fluctuates around the
threshold, and the flag repeatedly turns ON or OFF, setting hysteresis will sta-
bilize the flag operation.
HH set value or
H set value
HH Alarm Flag or
H Alarm Flag
The time until the Comparator Result Flag turns OFF can be extended. For
example, even if the Flag is ON momentarily, the OFF delay can be set so that
the Master can receive notification of the Flag's status.
HH set value
HH Alarm Flag
1. Double-click the icon of the Analog Slave 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 Pa-
rameters and Edit.)
Hysteresis width
LL set value or L
set value
LL Alarm Flag or
L Alarm Flag
Hysteresis width
OFF delay
Section 7-4
Hysteresis
width
349