Siemens SIRIUS 3RW5 Equipment Manual page 72

Configuring
6.2 Configuring the 3RW5 soft starter in the Modbus RTU system
Procedure
1. Configure the 3RW5 soft starter in the Modbus RTU system.
The following procedures are possible, for example:
– Configuring 3RW5 soft starters without help from a 3RW5 HMI (Page 78)
– Configuring 3RW5 soft starters with the aid of a 3RW5 HMI (Page 80)
Refer to the information on Modbus RTU in chapter Configuring the 3RW5 Soft Starter
(Page 73).
2. Parameterize the 3RW5 soft starter. In particular, note the information in chapter
Operation on failure of the bus connection to the controller (Page 88). You will find more
information on parameterization in the Equipment Manual of the 3RW5 soft starter.
Depending on the selection and equipment of the 3RW5 soft starter, you can
parameterize the 3RW5 soft starter in different ways via the
3RW5 communication module:
– Modbus master on PC with Modbus RTU connection
– Configuration software of the controller on PC or programming device with a
Note
With Modbus RTU, you can set only values for parameter set 1 (PS 1) and parameters
(e.g. input action) that are independent of the parameter set. For PS 2 and PS 3, the
default values are used.
Note
During parameterization of the 3RW5 soft starter, it is possible to select impossible
combinations of interdependent values. In the "Soft starter diagnostics" data table
(Page 152) the diagnosis "Invalid parameter value" is then signaled. You will find the
dependencies of the parameters in the Equipment Manual of the 3RW5 soft starter.
Result
The 3RW5 soft starter is integrated into the Modbus RTU system as a slave and
parameterized. You can program the controller and commission the 3RW5 soft starter in the
Modbus RTU system.
72
Modbus RTU connection.
SIRIUS 3RW5 Modbus communication module
Equipment Manual, 03/2020, A5E43676481002A/RS-AC/003