Siemens SIRIUS 3RK3 - Replacement of AS-I Components; Replacement of an AS-I Slave During Running Operation

7.10 Replacement of AS-i components
7.10.1 Replacement of an AS-i slave during running operation
Behavior of the MSS 3RK3 in case of a defective AS-i slave:
An AS-i slave is considered faulty or defective if it is no longer addressed by the AS‑i master.
MSS 3RK3 detects this con󹪝guration error and uses the substitute value "0" in the
interconnection logic.
Replacement of a non-safety-related slave
WARNING
Loss of the safety function through changes to the system.
Can Cause Death, Serious Injury, or Property Damage.
To ensure the safety of the system, any changes to it or any replacement of defective
components must be followed by a thorough and successfully completed function test of the
system.
A complete function test consists of the following tests:
• Con󹪝guration test (test of the con󹪝guration)
• System test (wiring test of the connected sensors and actuators)
If a non-safety-related slave of the same type is plugged in at the corresponding address and if
MSS 3RK3 detects that this slave matches the data in the con󹪝guration of the target expanded
con󹪝guration, the con󹪝guration error will automatically be reset. The sensor value is input to the
logic processing again instead of the substitute value.
Replacing a safety-related AS-i slave
WARNING
Loss of the safety function through changes to the system.
Can Cause Death, Serious Injury, or Property Damage.
To ensure the safety of the system, any changes to it or any replacement of defective
components must be followed by a thorough and successfully completed function test of the
system.
A complete function test consists of the following tests:
• Con󹪝guration test (test of the con󹪝guration)
• System test (wiring test of the connected sensors and actuators)
Addressing the new slave
Diagnostics / service
7.10 Replacement of AS-i components
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 351