Functions
7.10 Control via digital input
SIRIUS 3RW50 soft starter
Manual, 09/2019, A5E35628455002A/RS-AA/001
139
7.10
Control via digital input
Operating principle
The parameter "Control via digital input" is only relevant when using a
3RW5 communication module. The parameter is helpful, for example, for applications in
which the bus connection serves mainly for observation and monitoring purposes.
The parameter defines how the master control function behaves on failure of the bus
connection or a CPU stop. A failure of the bus connection or a CPU stop can also occur in
the operating mode "manual - local", for example when observing or monitoring via the bus
connection. You can use the parameter to disable a switchover to the "Automatic" mode and
operating mode "manual - bus".
Setting options
Parameterization of the control via digital input is possible by the following methods:
●
Setting parameterizing mode via key combination on the 3RW50 soft starter (Page 101)
●
3RW5 HMI High Feature
Access protection to 3RW5 HMI High Feature is not active or has been reset.
Menu: "Parameters > Soft Starter > Additional parameters > Control via digital input"
Parameter
Parameter
Description
Control via digital input
Manual activation
On failure of the bus connection or a CPU stop the 3RW50 soft starter
remains in the "Automatic" mode or the 3RW50 soft starter switches to
the "Automatic" mode.
Permanent activation
A switch to the "Automatic" mode and operating mode "manual - bus" is
not possible. If the 3RW50 soft starter is in the "Automatic" or "manual -
bus" mode, the 3RW50 soft starter switches to the "Manual operation
local - input controlled" mode. Control by means of a higher-level control
(e.g. PLC) is not possible.
Activate on bus error (factory setting)
On failure of the bus connection or a CPU stop, the 3RW50 soft starter
switches from the "Automatic" mode to the "Manual operation local - input
controlled" mode or the 3RW50 soft starter remains in the operating
mode "manual - local" mode.
No change on bus error
On failure of the bus connection or a CPU stop the master control
function does not switch, but the 3RW50 soft starter remains in the
current mode.
