If the newly inserted, safety-related AS-i slave already has the correct address, it is enough to
close the contacts on the safety-related AS-i slave in order for the MSS 3RK3 to be able to receive
the new code sequence.
If the new safety-related AS-i slave has to be included on the bus by the AS-i master, it is rst
necessary to wait for the autoadressing phase of the AS-i master. During the autoaddressing
phase, the new AS-i slave is addressed through address "0." This is not monitored by the MSS
3RK3. The system does not detect the new AS-i slave until it is provided with a correct address.
Teaching the new code sequences
If a safety-related AS-i slave is replaced, the MSS 3RK3 detects that the code sequence
transmitted by the AS-i slave is not contained in the code sequence table. This initially results in
the substitute value "0" being used in the interconnection logic for this slave.
Note
Important requirement
Before the code sequences are taught, both contacts of the safety-related AS-i input slaves must
be closed to enable the code sequences to be taught.
If the contacts are not closed, calculation in the logic diagram continues with the substitute
value "0." The current status of the AS-i slave is displayed in the "Learn ASIsafe code tables" dialog
box in Safety ES.
If MSS 3RK3 has ascertained after a monitoring period has elapsed that the new code sequence
is unique, the TEACH-LEDs will indicate that the new code sequence can be used instead of the
originally used code sequence. The new code sequence is applied and saved if you press the
RESET button for 3 s or use the "Apply learned AS-i code tables" command.
Table 7-1 LED display during teaching of code sequences
LED Display Explanation
DEVICE green Device in safety mode
ickering green Device in test mode
AS-i ashing red Other code sequence on the AS-i bus
TEACH yellow ashing Teaching of code sequences active: The code sequences
are being taught.
SF O No group error
Table 7-2 LED display if the code tables can be applied
LED Display Explanation
DEVICE green Device in safety mode
ickering green Device in test mode
AS-i ashing red Other code sequence on the AS-i bus
TEACH yellow Code sequences can be applied
SF O No group error
You will nd further information in Chapter "Teaching the code sequences (Page 208)".
Diagnostics / service
7.10 Replacement of AS-i components
SIRIUS 3RK3 Modular Safety System
352 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006
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