The DL-CNT1 module contains 4 counters with 24-bit range (numerical range of each counter is 0 to 16,777,215). The first two counters have more configuration options compared to the second couple of counters ():

• Alarm output can be set when counter value exceeds defined value. Output logic (if active high or low) can be defined in the counter configuration.

• Counting can be enabled/disabled by the external input (gate). Gate logic (if active high or low) can be defined in the counter configuration. Inputs of the last two counters are used as gate inputs for first two counters. (counter 2 input works as gate for counter 0 and counter 3 input works as gate for counter 1).

Third and fourth counters functionality is limited to simple counting with the possibility to read and preset counter value. Counter modes (counting enable, logical signal levels etc.) are defined by software.

The DL-CNT2 contains one incremental counter with 32-bit precision (counter numerical range is -2,147,483,648 to 2,147,483,647). The counter is also capable to preset counter value and capture value according to logical inputs and to signal alarm outputs if the counter value underflows low limit or overflows high limit. The counter can work in three modes:

• counting of quadrature-modulated inputs

• counting of two up/down inputs

• counting of two step/direction inputs

Thorough module description can be found in the DataLab IO/USB hardware documentation. Software control and configuration options are described in the DataLab IO/USB Active X and Control Web driver documentation.