S5-95F Design, Functions and Operation
Quasi-Safety Mode
The S5-95F is in the quasi-safety mode, if no
EPROM submodule
is plugged in
and
when you
observe a
special sequence
when switching on the system. Via the programmer you transfer the
control program directly into the internal RAM of the S5-95F.
In the quasi-safety mode, the S5-95F operates in the same way as in the safety mode. Since,
however, the control program is not protected against corruption, the quasi-safety mode may only be
used for testing of the control program.
Self-test routine in quasi-safety mode
Immediately after switching on the quasi-safety mode, the S5-95F executes the complete self-test
routine and thus checks all components. Execution of the total self-test routine takes approx. 90 s.
In the RUN mode, the S5-95F executes the self-test in test slices. The operating system of the S5-
95F ensures that all test slices are executed once within one hour.
Switching the S5-95F to Quasi-Safety Mode
Prerequisites:
• The system has executed the same control program at least once in the test mode
• The ON/OFF switches of both basic units are in the "0" position
• The RUN/STOP switches of both basic units are in the STOP position
•
No EPROM submodules
are plugged into the two basic units
Table 2-5. Switching to Quasi-Safety Mode
Step Procedure S5-95F Reaction
1 Switch on the power supply of both
subunits
Set ON/OFF switch to "I"
The subunits are synchronized.
Both STOP LEDs flicker for approx. 20 s;
afterwards, both STOP LEDs show steady
light.
2 Switch the system to RUN
Briefly press the RUN/STOP switch of
subunit A and B simultaneously in the
COPY position
Set the RUN/STOP switch of subunit
A to RUN
Set the RUN/STOP switch of subunit
B to RUN (within 30 min.)
System switches to quasi-safety operation.
Subunit A:
STOP LED on, RUN LED flashing
Subunit B:
STOP LED on
System executes complete self-test, STOP
and RUN LEDs in both subunits are on for
approx. 90 s, afterwards both RUN LEDs
show steady light.
System is in quasi-safety mode
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If you wish to change from quasi-safety mode to test mode, you must perform an overall reset on
the S5-95F.
EWA 4NEB 812 6210-02
2-15
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