Watchdog Timer Output (Jwdt1); Table 1.4: Watchdog Timer Output (Jwdt1); Table 1.5: Atx/At Mode Selector (Pson1); Table 1.6: Com3 Rs-232/422/485 Mode Selector (Jsetcom3 - Advantech AIMB-781 User Manual

1.8.3

Watchdog timer output (JWDT1)

The AIMB-781 contains a watchdog timer that will reset the CPU. This feature means
the AIMB-781 will recover from a software failure or an EMI problem. The JWDT1
jumper settings control the outcome of what the computer will do in the event the
watchdog timer is tripped.

Table 1.4: Watchdog timer output (JWDT1)

Function
NC
* Reset
* default setting
Note! The interrupt output of the watchdog timer is a low level signal. It will be
held low until the watchdog timer is reset.

Table 1.5: ATX/AT mode selector (PSON1)

Function
AT Mode
* ATX Mode
* default setting

Table 1.6: COM3 RS-232/422/485 mode selector (JSETCOM3)

Use JSETCOM3 to select the RS-232/422/485 mode for COM3. The default setting is RS-
232.
AIMB-781 User Manual
Jumper Setting
1 2 3
1-2 closed
1 2 3
2-3 closed
Jumper Setting
1 2 3
1-2 closed
1 2 3
2-3 closed
RS232 RS422
10
RS485