WISE-4000 User Manual 56
Digital Filter
Digital input channels support digital filters, these can be enabled or disabled by
clicking the Digital Filter check box. If you enable the filter, you can define the mini-
mum acceptable signal width by the Min. Low Signal Width and Min. High Signal
Width text box. (Unit: 0.1ms) The high frequency noise will be removed by this filter.
Counter Mode
When you choose Counter mode, one counter will count the pulse number of the dig-
ital signal from the selected channel, and then record the count number in the regis-
ter. In the DI Status page, the current count value of the selected channel is displayed
by the Counter value text box. Start or stop the counter by switching the Start/Stop
switch next to the Counter value. Reset the counter (the value in the register will be
initialized to the startup value, default to be zero) by clicking the Reset button. Preset
the Startup Value in the text box. When you reset the counter value, either by the
reset button in the status page or by a command, the value will be reset to the Startup
Value. The default value of the Startup Value is zero.
Like the DI mode, you can enable/disable the Invert Signal function and Digital Fil-
ter in the configuration page. The operation is the same. If you enable Keep Last
Value, when the digital module been powered off, the last counter value will be kept
in the register. When the module powers on, the counter will continuously count from
that value. Without this function, when the module powers off, the counter will reset
and the count value in the register will be zero.
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