Functions Under "Additional Parameters - Siemens SIRIUS 3RW55 Equipment Manual

Functions

8.16 Functions under "Additional parameters"

Procedure for SIL 1 (STO)
1. Reset the signal at the failsafe digital input F‑DI by changing from the OFF command to the
ON command.
Note that just resetting the EMERGENCY-STOP pushbutton does not initiate a restart
(EN 60204‑1).
2. Acknowledge the error with the message text "Safety-related shutoff" by canceling the motor
ON command.
Note that the error with the message text "Safety-related shutoff" can only be acknowledged
with the stop key if a 3RW5 HMI High Feature is used.
The motor can be started again.
3. Set a start command at digital input DI again
The motor starts again.
Procedure for SIL 3 (STO)
1. Reset the signal at the failsafe digital input F‑DI by issuing an enable signal by pressing the
start key on the safety relay / safety control.
2. Acknowledge the error with the message text "Safety-related shutoff" by canceling the motor
ON command.
Note that the error with the message text "Safety-related shutoff" can only be acknowledged
with the stop key if a 3RW5 HMI High Feature is used.
The motor can be started again.
3. Set a start command at digital input DI again
The motor starts again.
Procedure for SIL 3 (STO) with coupling of the control signal at the digital input DI to the enable
signal at the failsafe digital input F‑DI.
Reset the signal at the failsafe digital input F‑DI by issuing an enable signal by pressing the start
key on the safety relay / safety control.
The motor starts again if a start command is still present at the digital input DI.
8.16 Functions under "Additional parameters"
Operating principle
The 3RW55 and 3RW55 Failsafe soft starters have additional functions and settable parameters
that are to be found under "Additional parameters" in the 3RW5 HMI High Feature.
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SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006