Input Filter (Input Units Only) - Omron CRT1 - 10-2009 Operation Manual

Functions of Digital I/O Slave Units

11-3-2 Input Filter (Input Units Only)

Description
Input Time Constant
OFF Response Time
Settings Using the CX-Integrator
1,2,3...
496
An input value is read more than once during a set time interval. The input
value can be set to be enabled only when all the read values are the same.
This function operates for all input points in one Slave Unit.
When the input data turns ON, the input data is read 4 times at a set time (1/4
of the time setting). The internal input data turns ON only when all four values
are ON. The ON timing is delayed by the value of the input time constant. The
same function is supported when the input data turns OFF.
1 2 3 4
ON
OFF
The internal input data
OFF
ON OFF ON
remains OFF because the
read input data was not ON
all 4 times.
Input data
ON
OFF
When the input data turns OFF, the input data is read 5 times at a set interval
(1/5 of the OFF response time setting). The internal input data turns OFF only
when all values are OFF. The OFF timing is delayed by the value of the OFF
response time.
This function can also be used to implement an OFF delay.
To enable reading pulses shorter than the communications cycle time, set the
OFF response time to a value longer than the communications cycle time.
(The input may remain ON if the input pulse interval is too short.)
1 2 3 4 5
ON
OFF
OFF ON OFF OFF ON
The internal input
data remains ON
because read input
data was not OFF
Input data all 5 times.
ON
OFF
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. Click the IN Tab. Select the Input Time Constant and OFF Delay from the
pull-down lists.
1 2 3 4
ON
OFF
The internal input
ON ON ON ON
data turns ON
because the read
input data was
ON all 4 times.
Input data
ON
OFF
ON delay (= input filter time)
1 2 3 4 5
ON
OFF
OFF The internal
OFF OFF OFF OFF
input data turns
OFF because
the read input
Input data
data was OFF
all 5 times.
ON
OFF
OFF-delay time
Section 11-3