S5-95F Design, Functions and Operation
2.5.3 Operating Statuses of the S5-95F Following Power-Up
Table 2-7. Operating Statuses of the S5-95F Following Power-Up
Operating
Status
Prerequisite Characteristics of the
Operating Status
Optical
Display
System
initialization
ON/OFF switches of
both subunits in "1"
position
Subunits are synchronized
• All outputs are disabled
• In the safety mode, the S5-95F
loads the control program from the
memory submodule
• In the test mode, the control
program is not loaded
automatically
STOP LEDs
flickering
STOP System initialization
executed successfully
Position of RUN/STOP
switches irrelevant
• Self-tests are executed, but no I/O
test
• All outputs are disabled
• User program is not yet processed
STOP LEDs show
steady light
STARTUP RUN/STOP switches of
both subunits in "RUN"
position
• Execution of the complete self-test
in the safety mode
• Process I/O images, timers and
non-retentive flags and counters
are set to zero
• DB1 parameters are accepted
• OB21/22 are processed
• External I/Os and onboard I/Os are
not yet addressable
• Scan monitor is switched off
• Time-controlled and interrupt-
controlled processing are not
possible
STOP and RUN-
LEDs show steady
light
RUN STARTUP executed
successfully
Both RUN/STOP
switches in "RUN"
position
• Execution of the complete
additional self-test routine once
within one hour
• Process I/O images, timers,
counters and flags are compared
cyclically
• Scan monitor is active
• OB1 is processed
• Input modules are read
• Output modules are addressed
• Time-controlled and interrupt-
driven processing not possible
RUN LEDs show
steady light
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EWA 4NEB 812 6210-02
2-17
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