7.10.4 Additional AS-i slave in running operation
Additional non-safety-related AS-i slave
An additional non-safety-related slave on the AS-i bus is ignored.
Additional safety-related AS-i slave
WARNING
Loss of the safety functions.
Can Cause Death, Serious Injury, or Property Damage.
For safety reasons, the code sequences of all safety-related slaves must be known to every
monitor on the AS‑i bus. If an additional safety-related AS‑i slave is added to the AS‑i bus, the
code sequence of this slave must be taught on every MSS 3RK3 or safety monitor located on the
AS‑i bus, irrespective of whether or not this new safety-related AS-i slave is monitored by the
respective MSS 3RK3 or safety monitor.
Consider the following when adding a further safety-related slave:
• If a new safety-related AS-i slave is connected to the AS-i bus and its contacts are closed, the
MSS 3RK3 detects a new code sequence, the AS-i BF-LED ashes red, and the TEACH-LED
lights up yellow. The code sequence table can be transferred into the memory of the
MSS 3RK3 in three dierent ways:
– Pressing the RESET buttons for 3 s
– Pressing the "Apply code tables" button in the "Target system" > "ASIsafe code tables"
dialog box in Safety ES
– Controlling a device command function element with the "Adopt code tables" command
The TEACH-LED goes o after the code sequences have been successfully stored.
• As long as the contacts of the safety-related input slave are not closed, it will be ignored by
the MSS 3RK3.
• As soon as teaching in the background has detected that the code sequence that provides a
newly inserted safety-related AS‑i slave is identical to an existing slave, the substitute value
"0" will be used for both slaves.
You will nd further information in Chapter "Teaching the code sequences (Page 208)".
7.10.5 Replacement of MSS 3RK3 with AS-i interface
Replacement of all 3RK3 central units is identical. Because the code sequences are stored on the
memory module, the code sequences do not have to be taught as new.
Diagnostics / service
7.10 Replacement of AS-i components
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 355
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