Siemens SIRIUS 3RW5 - Page 90

Configuring
6.4 Operation on failure of the bus connection to the controller
SIRIUS 3RW5 Modbus communication module
90 Equipment Manual, 03/2020, A5E43676481002A/RS-AC/003
Parameters
Parameters
Description
Response to CPU/Master
Stop
This parameter defines how the 3RW55 and 3RW55 Failsafe Soft Starters behave on failure
of the bus connection or CPU stop:
• Switch substitute value (factory setting)
The process image output of the 3RW5 soft starter is automatically changed to the
values defined in the following parameter "Substitute value".
• Keep last value
The 3RW5 soft starter does not change the process image output. The current control
commands are retained.
Substitute value
1)
On failure of the bus connection or CPU stop, the 3RW55 and 3RW55 Failsafe Soft Starters
can be controlled by a substitute process image output.
• Motor CW
• Motor CCW
• Reset
• Emergency start
• Creep speed
• Output 1
• Output 2
• Parameter set bit 0
2)
• Parameter set bit 1
2)
• Disable Quick-stop
• Output 3
• Activate pump cleaning (only adjustable via user program)
• Manual operation local - input controlled (only adjustable via user program)
• Use alternative stopping mode
• Motor standstill
Parameters of CPU / master
disabled
This parameter defines how the 3RW55 and 3RW55 Failsafe Soft Starters process the
parameter values received from the controller.
• Deactivate (factory setting)
The parameters set on the 3RW55 or 3RW55 Failsafe Soft Starter are overwritten on
bus startup by the values stored in the configuration software of the controller.
• Activate
The Soft Starter acknowledges to the controller the correct receipt of all the parameter
values sent to it by the controller via cyclic and acyclic communication channels.
The 3RW55 or 3RW55 Failsafe Soft Starter then rejects these values. This prevents the
parameters stored in the 3RW55 and 3RW55 Failsafe Soft Starters from being
overwritten.
1)
In the 3RW5 HMI High Feature, the parameter is only visible if "Switch substitute value" is selected in the parameter
"Response to CPU / Master Stop".
2)
Explanation in the following table. When making the settings via the 3RW5 HMI High Feature, observe the Equipment
Manual of the 3RW5 soft starter. You can select the parameter set directly in the SIRIUS Soft Starter ES (TIA Portal).