Siemens CPU 312 IFM User Manual

CPUs
1-45
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Display of the Interrupt Inputs
In variable OB40_POINT_ADDR, you can view the interrupt inputs which have
triggered a process interrupt. Figure 1-9 shows the allocation of the interrupt inputs
to the bits of the double word.
Note: Several bits can be set if interrupts are triggered by several inputs within
short intervals (< 100 s). That is, the OB is started once only, even if several
interrupts are pending.
0 Bit No.
PRIN from I126.0
54 13
2
31 30
PRIN from I126.1
PRIN from I 126.2
PRIN from I126.3
Reserved
PRIN: Process
interrupt
Figure 1-9 Display of the States of the Interrupt Inputs of the CPU 314 IFM

Siemens CPU 312 IFM Specifications

General

Brand	Siemens
Model	CPU 312 IFM
Category	Controller
Language	English