Selecting 10-Ms Time-Constant Filter; Figure 2-3 S1 Dipswitch Settings; Figure 2-4 S2 Dipswitch Settings - Siemens SIMATIC 505 User Manual

Selecting 10-ms
Time-Constant
Filter
SIMATIC 505 Interrupt Input Module User Manual
Figure 2-3 shows how to set the dipswitches in S1 to select the interrupt
type for each pair of input points.
Switch S1
Interrupt Type Switches
Each pair of switches selects interrupt type
for a pair of input points, as shown here.
A B A
OFF
y
b
ON
1 2 3
Input
Points
9/10 11/12
The second set of dipswitches, located closest to the faceplate of the module
and labeled S2, is used to select input filter time constants of 10 ms per pair
of points, as shown in Figure 2-4. You can filter any of the 16 input points,
both non-interrupting and interrupting. The 10-ms filter may be useful in
applications where relay chatter or switch bounce is a potential problem.
NOTE: Filtering delays module response time to input transitions. For
interrupt applications with critical response time requirements, be careful
to take into account the time delay before you decide to use these filters.
OFF
y
b
ON
Input Points:
B A B A B
4 5 6 7 8
13/14 15/16

Figure 2-3 S1 Dipswitch Settings

Switch S2
10-ms Filter Switches
Each switch activates the filter for a
pair of input points, as shown here.
1 2 3 4 5
1/2 3/4 5/6 7/8 9/10 11/12 13/14 15/16

Figure 2-4 S2 Dipswitch Settings

Select Interrupt Type for each pair of
points according to the chart below.
Interrupt Type
A B
Off Off
No Interrupt
Off
On-to-off edge
On
Off
Off-to-on edge
On
Either edge
On On
Off = no filter
On = 10-ms filter
6 7 8
Installing the Module 2-5