Down Counter; Watchdog (Apci-2032, Apci-1564); Fig. 8-11: Function Of The Down Counter - Addi-Data APCI-2032 Technical Description

APCI-1032, APCI-1564 and APCI-2032

Down counter

To count the same number of values (4) as by up counting, the reload value is to be set
to 3.
The counter counts down to 0 and is reset to the reload value from the next changing
edge.
8.6

Watchdog (APCI-2032, APCI-1564)

The watchdog is a down-counter which resets the digital outputs after the reload value
has run down (timeout).
3 different states are available for the watchdog.
The watchdog is switched off. It has no influence ont the outputs.
"OFF"
The watchdog is switched on by software trigger.
"ON"
It controls the program course and affects the outputs through timeout.
"Alarm" The watchdog sets alarm by resetting all outputs.
The states can be read back through software.
Time intervals can be programmed from 20 ms to 5 s in 20 ms steps.

Fig. 8-11: Function of the down counter

Functions of the board
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