7.3.2 Useful Operating States For Normal Operation And Transitions - Siemens SIMATIC S5 Manual

IP 265
This provides you with the opportunity to continue the sub process controlled by the IP 265 even if
the CPU is in the STOP mode.
Table 7-2. Behaviour of IP 265 in Case of CPU STOP if IP 265 is in RUN Mode
Configuration
DISABLED (default setting)
ENABLED
DISABLED:
If the CPU goes into RUN mode again, the IP 265 must be switched explicitly to RUN by a RUN
command (control word). Since the PIQ is deleted at a cold restart of the CPU, the input parameters
must also be entered into the PIQ in addition to the control word.
ENABLED:
In this case, the IP 265 remains in the RUN mode after a CPU STOP. Since the PIQ is deleted at a
cold restart of the CPU, the input parameters must be entered in the PIQ again and the RUN bit in
the control word must be set again. Only if the RUN bit is set, are the input parameters processed
by the IP 265.

7.3.2 Useful Operating States for Normal Operation and Transitions

The state transition diagram in Figure 7-2 on the next page gives an overview of possible operating
states and their transitions during normal operation of the IP 265. Error states which can be initiated
through incorrect user inputs and hardware faults are not included in the representation.
Prerequisite for normal operation:
A permissible memory submodule with valid IP 265 user program is inserted in the IP 265.
EWA 4NEB 812 6130-02a
LEDs
STOP LED: Steady light
RUN LED: Steady light
Startup, Loading and Operating States
Behaviour
IP 265 enters STOP state, I/O is
passive
IP 265 remains in the RUN
state, I/O is active
7-9