Siemens SIRIUS 3RK3 - Simulation of Non-Safety-Related AS-I Slaves

6.5.7.4 Simulation of non-safety-related AS‑i slaves
An MSS 3RK3 with AS‑i interface can identify itself as a slave on the AS-i bus. For this, a maximum
of 4 non-safety-related standard slaves or a maximum of 4 A/B slaves are simulated on the bus.
One of these AS-i slaves can be con󹪝gured as a CTT2 diagnostics slave.
The following non-safety-related slaves can be simulated:
• Standard slaves type S‑7.F.F (Std 4I/4O)
• A/B slaves type S‑7.A.E (A/B 4I/3O)
• CTT2 diagnostic slave type S-7.5.5 (CTT2 + 2I/2O)
With a simulated non-safety-related AS-i slave, master calls to the simulated slave can be
incorporated in the safety logic and signals sent to the master.
CTT2 slave
With a simulated CTT2 slave, diagnostic data can be exchanged with the AS-i master via the CTT2
protocol (message and control data). The CTT2 slave also has 2 non-fail-safe inputs and outputs.
Terminal designation in Safety ES
Input terminals for non-safety-related signals can have input signals of the simulated slaves
assigned to them in the interconnection logic in Safety ES.
Terminal designation in the input cell Explanation
SLOT3_ASI#xx(AB)_Qc Master call from AS-i master to simulated non-safety-rela‐
ted AS-i slave of the MSS 3RK3
SLOT3_ASI#xx_Qy.z Master call (CTT2 protocol) from AS-i master to simulated
non-safety-related AS-i slave (CTT2) of the MSS 3RK3 (see
Chapter "Diagnosis using AS-Interface (CTT2 protocol)
(Page 298)")
Output terminals for non-safety-related signals can be con󹪝gured as output signals of the
simulated slaves in the interconnection logic in Safety ES.
Terminal designation in the output cell Explanation
SLOT3_ASI#xx(AB)-Sc Sensor signal from MSS 3RK3 to AS‑i master: Non-safety-
related AS‑i output data range of the simulated AS-i slave
designates "non-safety-related" output
SLOT3_ASI#xx-Sy.z Signal from simulated CTT2 slave of MSS 3RK3 to AS‑i mas‐
ter (see Chapter "Diagnosis using AS-Interface (CTT2 pro‐
tocol) (Page 298)").
xx: AS-i address
(AB): A or B can be entered here if the monitored slave is an A/B slave. This identi󹪝er is omitted for standard
slaves. MSS 3RK3 supports only standard slaves for CTT2.
c: Channel number of AS-i slave process image
y.z: De󹪝nes bit position in CTT2 frame
Operation
6.5 Connecting to the AS-i master via AS-Interface
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 217