Siemens Simatic S7-400 - Manual (Page 470)

CPUs for M7-400
11-42
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Interrupt Assignment
Table 11-9 Interrupt Assignment
Interrupt Function
NMI Group interrupt for faults and reset signals
IRQ0 System timer
IRQ1 Reserved for keyboard
IRQ2 Cascading of the 2nd interrupt controller
IRQ3 Assigned to COM2, otherwise free
IRQ4 Assigned to COM1, otherwise free
IRQ5 Assigned to LPT2, otherwise free
IRQ6 Assigned to floppy disk drive, otherwise free
IRQ7 Assigned to LPT1, otherwise free
IRQ8 Real-time clock
IRQ9 Software interrupt, rerouted to IRQ2
IRQ10 IF 964-DP, otherwise free
IRQ11 CP 1401, otherwise free
IRQ12 Assigned to trackball/mouse
IRQ13 Assigned to numeric coprocessor
IRQ14 Assigned to hard disk drive, otherwise free
IRQ15 Assigned