Omron CRT1 - 10-2009, Operation Manual

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521
Analog I/O Slave Unit (input) Functions
Section 11-4
Setting Hysteresis
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 and OFF, set the hysteresis to
stabilize the flag operation.
OFF Delay
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 Unit can receive notification of the Flag’s status.
Setting Using the CX-Integrator
1,2,3... 1. Turn ON the power supply to the CompoNet Slave Unit.
2. Double-click the icon of the Slave Unit to set in the Network Configuration
Window to open the Configuration Window. (Alternatively, right-click the
icon and select
Parameters - Edit from the pop-up menu.)
3. Select the Tab Page for the input where the comparator function is to be
set, and select
Comparator under the Function Choice heading.
HH set value or
H set value
Hysteresis width
LL set value or L
set value
Hysteresis
width
HH Alarm Flag or
H Alarm Flag
LL Alarm Flag or
L Alarm Flag
HH set value
Hysteresis width
OFF delay
HH Alarm Flag