Technical data

Manual VIPA System 200V Chapter 3 Digital input modules
HB97E - SM - Rev. 09/19 3-37
The module has 3byte parameter data for selecting the counter mode and
configuring the digital input filters.
Byte Bit 7 ... Bit 0
0 Counter function
00h: Quadruple Pulse Evaluation
01h: Pulse and Direction Evaluation
02h: Clock Up / Clock Down Evaluation
03h: Frequency Measurement
04h: Period Measurement
others: not allowed
1 Filter (Divider 0) value: 0 ... 255
2 Filter (Divider 1) value: 0 ... 255
A description of the counter functions can be found at the next page.
The counter inputs are debounced by means of digital filters, which can be
adjusted via parameter Filter (Divider 0 and Divider 1).
So that an pulse can be evaluated as a counting pulse, this must be
present longer than the parameterized filter value. Shorter pulses are not
evaluated.
For calculation of the pulse time the following formula is to be used:
T
Pulse
≥ (Divider 0 +1)*(Divider 1 +1)*2.5µs
Divider 0 = 3, Divider 1 = 0
T
Pulse
≥ (3+1)*1*2.5µs = 10µs
In this way filter for a pulse time of 2.5 ... 163840µs can be parameterized.
Divider 0 = 0, Divider 1 = 0
T
Pulse
≥ 1*1*2.5µs = 2.5µs
By default (after Reset) a filter width of 2.5µs is used.
Parameter data
Counter function
Filter
Example:
Example (default:)