Optional Configurations
5-7
High Speed Counter Encoder Module User Manual
Two jumpers, one for Channel 1 and one for Channel 2, select the minimum
input pulse width detected by the counter. By selecting the appropriate
filtering jumper, you can prevent narrower input signals or noise from being
counted by the counter. Table 5-1 lists the jumper settings for each filtering
option. The default setting is shaded in the table. See Figure 5-3 for jumper
locations.
Table 5-1
Input Filtering Jumper Options
Channel 1
Jumper
Channel 2
Jumper
Filter Frequency
Minimum
E47
E53
100 kHz
4 microseconds
E48
E54
25 kHz
16 microseconds
E49
E55
6.25 kHz
64 microseconds
E50
E56
1.5 kHz
256 microseconds
E51
E57
400 Hz
1024 microseconds
E52
E58
100 Hz
4096 microseconds
For a more detailed description of the characteristics of input filtering, see
Appendix A.
Setting both jumpers to the Hold (left) position prevents the MODFAIL or
OUTDIS signals from affecting the output drivers. If you install the
MODFAIL jumper in the Clear (right) position, an active signal disables
(turns off) the eight outputs. If you install the OUTDIS jumper in the Clear
(right) position, an active signal disables (turns off) the eight outputs.
When the module fails, the output states may continue to change,
depending on the counter configuration and input clock.
The polarity of the eight output signals is individually selectable by
jumpers. See Figure 5-3.
•
Setting a jumper to the right position (non-inverted) causes a 1 output
to turn on the output.
•
Setting a jumper to the left position (inverted) inverts the output signal
so that a 0 turns on the output.
Input Filtering
Options
Output Disable
Jumpers
Output Polarity
Jumpers