Siemens SIRIUS 3RW52 Equipment Manual page 34

Description
3.6 Operating modes and master control function
Connection abort
On failure of the bus connection or a CPU stop, the 3RW52 soft starter behaves as follows,
irrespective of the mode:
3RW52 soft starter with firmware version earlier than V2.0.1: The 3RW52 soft starter
remains in "Automatic" mode or switches to "Automatic" mode.
Note
Response of 3RW52 soft starter in the event of bus connection failure or CPU stop
(3RW52 Soft Starter with firmware version earlier than V2.0.1)
To enable you to continue controlling the 3RW52 soft starter after failure of the bus
connection or CPU stop, you will need a 3RW5 HMI (accessory), which enables you to
switch to "Manual operation local" mode.
Without 3RW5 HMI, you cannot control the 3RW52 soft starter until the bus connection
has been restored.
Alternatively, you can remove the 3RW5 communication module. Then restore the
3RW52 soft starter on the device to the factory setting (Page 203) in order to switch to
"Manual operation local - Input controlled" mode.
3RW52 soft starter from firmware version V2.0.1: The 3RW52 soft starter behaves in
accordance with the parameter "Control via digital input" (Page 147).
If other connections between the control source and 3RW52 soft starter are aborted, control
automatically switches back to the lowest priority of the current mode.
"Automatic" mode: The 3RW52 Soft Starter responds as it does upon failure of the bus
connection or CPU stop.
Operating mode "manual - bus": Control switches to "Manual - bus - Connection abort".
Operating mode "manual - local": Control switches to "Manual - local - Input controlled".
Additional information
You will find further information on the 3RW5 communication modules in the manual for the
3RW5 communication module used.
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Equipment Manual, 04/2020, A5E35630451002A/RS-AE/005
SIRIUS 3RW52 Soft Starter