Siemens SIMATIC S5-115F - Page 345

Rules Governing the Use of the S5-115F S5-115F Manual
Example:
Structure of the control program
The control program is structured so that when a signal group is passivated, the relevant program
section is no longer processed ( Figure 10-40).
Please note that the I/O modules of one signal group can only be depassivated after safe switch on
of the control program has been confirmed.
Figure 10-40. Schematic of a Structured Program Sequence
Program for pre-
interlock of the
entire control
Process program section
e.g. PB 11 for control
of burner 1
Process program section
e.g. PB 12 for control
of burner 2
Process program section
e.g. PB 13 for control of
burner 3
Process program section
e.g. PB 14 for control of
burner 4
a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a
Has signal
group 13 been
passivated?
a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a
Has signal
group 11 been
passivated?
a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a
Has signal
group 12 been
passivated?
a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a
Are I/O
modules to be
passivated with
FB 255?
Depassivation of
signal group with
FB 255
Program section with
check of process
variables, to deter-
mine whether I/Os can
be switched back on
safely
a a a a a
a
a a a
a
a a a a a
yes
a a a a
a
a a
a
a
a a
a
a a a a
no
a a a a
a
a a
a
a
a a
a
a a a a
no
a a a a
a
a a
a
a
a a
a
a a a a
no
a a a a
a
a a
a
a a a a
no
a a a a
a
a a
a
a a a a
no
a a a a a
a
a a a
a
a
a a a
a
a a a a a
yes
a a a a a
a
a a a
a
a
a a a
a
a a a a a
yes
a a a a a
a
a a a
a
a a a a a
yes
a a a a a
a
a a a
a
a a a a a
yes
a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a
Has signal
group 14 been
passivated?
10-62 EWA 4NEB 811 6148-02