Advantech PCI-6872 用户手册
PCI-6872 User’s Manual
14
2.7 COM2 RS232-422-485 Select (J3)
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).
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 output option (J2)
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 J2 as shown below:
it can reset the system or generate an interrupt on IRQ11. This can be set
via setting J2 as shown below:
Table 2.4:
COM2 RS232-422-485 Select
PIN
RS232*
RS422
RS484
1-2
Closed
Open
Open
3-4
Open
Closed
Open
5-6
Open
Open
Closed
Table 2.5: Watchdog timer output option (J2)
*System reset
IRQ 11
* default setting