16
Function groups
Function groups
Manual ADQ-22/23-Serie Rev. 1.1
Digital
filter
Fig. 6: Wiring of the isolated digital inputs
3.2.3 Programming
All input ports (DI_x) can be programmed independently of each other. The port direction is
predetermined by the hardware.
A digital filter can be programmed for each port: 10 ms / 3.2 ms / 1 ms / 10 µs (bypass).
3.2.3.1 Read single value
In this operating mode, you can read in one digital value at a time in the respective port width.
Follow the procedure described in the online help.
3.2.3.2 Streaming operation
The software-controlled streaming mode enables the continuous reading of the digital inputs
up to 1 kS/s port by port.
Follow the procedure as described in the online help.
3.2.3.3 Interrupt modes
If required, the isolated input ports can be monitored for bit change or bit pattern equality and
evaluated as an interrupt event. In addition, an interrupt can be triggered if the external voltage
supply is missing or too low. Programming is done in the „Interrupt“ operating mode.
3.2.3.3.1 Bit change
In the „bit change“ operating mode, one or more input bits can be masked that are to be moni-
tored for a change of state. One bit mask each for rising and falling edge defines which bit and
which edge should trigger an interrupt. As soon as a corresponding edge arrives at at least one
bit masked with a „1“, an interrupt is triggered (see Fig. 6).
