Siemens Simatic S7 Series

Program instructions
7.10 Interrupt
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
289
Interrupt queue overflow bits
Description (0 = No Overflow, 1 =
Overflow)
SM Bit
Communications queue
SM4.0
I/O Interrupt queue SM4.1
Timed Interrupt queue
SM4.2
Priority order for interrupt events
Priority group
Event
Description
Communications
Highest Priority
8 Port 0 Receive character
9
Port 0 Transmit complete
23
Port 0 Receive message complete
24
Port 1 Receive message complete
25
Port 1 Receive character
26
Port 1 Transmit complete
Discrete
Medium Priority
19
PLS0 Pulse Count Complete
20
PLS1 Pulse Count Complete
34
PLS2 Pulse Count Complete
0
I0.0 Rising edge
2
I0.1 Rising edge
4
I0.2 Rising edge
6
I0.3 Rising edge
35
I7.0 Rising edge (signal board)
37
I7.1 Rising edge (signal board)
1
I0.0 Falling edge
3
I0.1 Falling edge
5
I0.2 Falling edge
7
I0.3 Falling edge
36 I7.0 Falling edge (signal board)
38
I7.1 Falling edge (signal board)
12 HSC0 CV=PV (current value = preset value)
27
HSC0 Direction changed
28
HSC0 External reset
13
HSC1 CV=PV (current value = preset value)
16
HSC2 CV=PV (current value = preset value)
17
HSC2 Direction changed
18
HSC2 External reset
32
HSC3 CV=PV (current value = preset value)