Siemens SIMATIC IM 151/CPU User Manual

Functions of the IM 151/CPU
5-14
ET 200S Interface Module IM 151/CPU
A5E00058783-01
OBs for Cycle and Restart
Table 5-9 OBs for Cycle and Restart
Cycle and Restart
Invoked OB Possible Start Events
Cycle OB 1  First OB 1 after restart (power on or STOP-RUN
transition of the IM 151/CPU)
 Termination of the previous program cycle
Restart (change from STOP to
RUN)
OB 100  Manual restart request (STOP-RUN via mode
selector or MPI command)
 Automatic restart request (after power off to power
on transition)
OBs for Interrupts
Table 5-10 OBs for Interrupts
Interrupts
Invoked OB Possible Start Events
Time-of-day interrupt
OB 10
 Automatic start after setting and activation of the time-of-day
interrupt using STEP 7
 Activation via SFC 30 after setting with STEP 7 or SFC 28
Delay Interrupt
OB 20
 Expiration of the time specified in SFC32
Watchdog interrupt
(default: 100 ms
clock pulse)
OB 35
 Depending on the clock pulse (parameter assignment with
STEP 7 )
Process interrupt OB 40  Activation of a process interrupt
Diagnostic interrupt OB 82  Outgoing event (cause of event no longer exists)
 Incoming event (cause of event still exists)
Removal/insertion
interrupt
OB 83
 Removal and insertion of modules in RUN mode
If OBs 10, 20, 40, 82, 83 are missing, or with OB 85 and the corresponding start
event, the IM 151/CPU goes into STOP mode.

Siemens SIMATIC IM 151/CPU Specifications

General

Brand	Siemens
Model	SIMATIC IM 151/CPU
Category	Control Unit
Language	English