Additional Information - Siemens SIRIUS 3RW5 Equipment Manual

Description
3.7 Operating modes and master control function
Connection abort
On failure of the bus connection or a CPU stop, the 3RW5 soft starter behaves as follows,
irrespective of the operating mode:
● 3RW50 soft starter: The 3RW50 soft starter behaves in accordance with the parameter
"Control via digital input" (Page 39).
● 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 (Page 49). Then restore
the 3RW52 soft starter on the device to the factory setting, in order to switch to the
"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 39).
● 3RW55 and 3RW55 Failsafe soft starters: The 3RW55 soft starter behaves in accordance
with the parameter "Response to CPU/master stop" (Page 88).
If other connections to the control source are aborted, the master control automatically
switches back to the lowest priority of the current mode.
● "Automatic" mode: The 3RW5 soft starter responds as it does upon failure of the bus
connection or CPU stop.
● Operating mode "Manual - local": Master control switches either to
"Manual - local - Connection abort" or to "Manual operation local - input controlled". For
certain 3RW5 soft starters and parameter assignments,
"Manual - local - Connection abort" is not possible. In the following cases, control
switches to "Manual operation local - input controlled":
– 3RW50 soft starter
– 3RW52 soft starter
– 3RW55 and 3RW55 Failsafe soft starters: Input action
Example of a 3RW55 soft starter: The 3RW5 HMI High Feature has master control.
Input 2 is assigned the input action "Operating mode manual - local" and the input action
is activated. On a connection abort terminating the connection to the
3RW5 HMI High Feature, control switches to "Manual - local - input controlled".

Additional information

Further information on the 3RW5 soft starters and restoring the factory settings of the device
can be found in the Equipment Manual of the respective 3RW5 soft starter.
34
"Operating mode manual - local" is parameterized and activated.
SIRIUS 3RW5 Modbus communication module
Equipment Manual, 03/2020, A5E43676481002A/RS-AC/003