interrupt routine in PLC?

[asahin11]

Hi all,

i wounder if the PLC systems have interrupt routine? if yesi how can i activate this routine(s)?

thanks, regards

[ausdev]

Most modern PLC's have some form of interrupt function.
Allen Bradley PLC's all employ a High speed interrupt for capturing encoder or pulse events
But the Micrologix range of PLC's has even more interrupt functions:
STI : selectable time interrupts. Program scan entera user set file every configured time period
UII : User select interrupt, the user sets an event (input or flag) and configures program file to enter upon event

Hope this helps!!

[asahin11]

thank you for your reply.

i wonder that program an interrupt routine in PLC is same as in microcontroller such as PIC, Motorola etc.?

regards,

[tuvoj]

Look at Z-Worlds PLC-related boards--they program in concurrent C/C++ and have full interrupt support that works very much as any other processor would...

Cheers-Tuvo