Siemens SIRIUS 3SK1

9.3 Modes
The 3SK1 safety relays have 4 main operating modes:
• Power-up
• Con󹪝guration mode
• Safety mode
• Error mode
Power-up
On powering up (up to 7 seconds), the 3SK1 safety relay runs through a complete function test.
Con󹪝guration mode
A saved con󹪝guration can only be modi󹪝ed in con󹪝guration mode.
The con󹪝guration must only ever be modi󹪝ed after disconnecting the power supply.
If the device detects a con󹪝guration change during the restart (DIP, PAR, potentiometer, input
expansion, output expansion), it does not change automatically to safety mode after power up,
but instead remains in con󹪝guration mode.
In con󹪝guration mode, those LEDs 󹪞ash yellow whose ON DIP switch position is on the right; all
other parameter settings are not explicitly indicated.
The con󹪝guration is accepted by pressing the SET/RESET button for approximately 1 s.
In con󹪝guration mode, the device is in the safe state. No monitoring functions are active.
Note
A con󹪝guration change made during operation is not accepted, and in safety mode, this is
indicated by a yellow/green 󹪞ashing "DEVICE" LED. The device can be restarted by performing a
RESET (pressing the SET/RESET button) or by disconnecting and reconnecting the supply
voltage.
Safety mode (DEVICE LED: green)
In safety mode, all monitoring functions are active in accordance with the set con󹪝guration.
Note
Parameterized startup testing is indicated by a green 󹪞ashing "DEVICE" LED. Only when this has
been successfully executed does the "DEVICE" LED show a green light.
Error mode
Error mode is indicated by a red "DEVICE" LED or by a red "SF" LED. In error mode, the
device ALWAYS changes to the safe state.
Con󹪝guration / operation
9.3 Modes
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005 179