Rs232/422/485 Select(J1); Watchdog Timer Configuration - Advantech PCA-6773 Series User Manual

2.7 RS232/422/485 Select(J1)

Table 2.4: RS232/422/485 Select
PIN
1-2
3-4
5-6

2.8 Watchdog timer configuration

An on-board watchdog timer reduces the chance of disruptions which
EMP (electro-magnetic pulse) interference can cause. This is an invalu-
able protective device for standalone or unmanned applications. Setup
involves one jumper and running the control software (refer to Appendix
A).
2.8.1 Watchdog timer action (JP2)
When the watchdog timer activates (CPU processing has come to a halt),
it can reset the system or generate an interrupt on IRQ11. This can be set
via setting JP2 as shown below:
Table 2.5: Watchdog timer action (JP2)
* default setting
PCA-6773 User's Manual
RS232
Closed
Open
Open
*System reset
RS422
Open
Closed
Open
14
RS485
Open
Open
Closed
IRQ 11