Operating principle of the energy saving mode
The following graphic shows the principle of operation of commands, parameters and
diagnostic messages:
(QGB3DXVH
6WDUWB3DXVH
W
RQ
W
RIIBPLQ
W
RII
W
3DXVHBPLQ
W
①
Message "Start pause pending" (46.6) in data set 92 from 3RW5 soft starter (slot 2) (Page 168)
②
Message "Energy saving mode active" (46.7) in data set 92 from 3RW5 soft starter (slot 2)
(Page 168)
③
Energy saving mode
④
Operating mode
t
off
"Time_to_Pause" parameter
t
off_min
"Time_min_length_of _stay" parameter
t
on
"Time_to_operate" parameter
t
Pause_min
"Time_min_Pause" parameter
8.1.2.2
Activating the energy saving function
After the "Start_Pause" command the 3RW5 soft starter checks the transmitted pause time
(t
Pause
). The switch to energy saving mode only takes effect when t
Pause
is greater than the device-
specific minimum pause time (t
Pause_min
). If the pause time is shorter, the 3RW5 soft starter
remains in operating mode and sends an error message.
To switch off the motor, the following cyclic and acyclic control data of the controller (bits in the
process image output (PIQ)) are suppressed and overwritten with the value "0":
• "Motor CW"
• "Motor CCW"
The other bits of the PIQ (e.g. "Reset") remain active.
Functions
8.1 PROFIenergy
SIRIUS 3RW5 PROFINET communication modules
86
Equipment Manual, 05/2021, A5E35631297002A/RS-AD/004