Siemens SIMATIC ET 200AL, System Manual

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Functions
5.11 Saving energy with PROFIenergy
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
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5.11 Saving energy with PROFIenergy
Saving energy with PROFIenergy
PROFIenergy is a PROFINET-based data interface for switching off consumers centrally and
with full coordination during pause times regardless of the manufacturer or device type.
Through this, the process should only be provided with the energy that is absolutely required.
The majority of the energy is saved by the process; the PROFINET device itself only
contributes a few watts of savings potential.
Figure 5-108 Energy savings during pauses with PROFIenergy
Basic information
In order to use the PROFIenergy functionality, the existing IO controller has to be "upgraded"
to a so-called "PROFIenergy controller" by means of a function block in the PROFINET IO
system and at least one PROFIenergy-capable IO device ("PROFIenergy device") has to exist.
The PROFIenergy commands (for example to start or end a pause) are sent by the
"PROFIenergy controller" to the individual "PROFIenergy devices". Each "PROFIenergy device"
decides individually how it responds to the PROFIenergy command (response is device- and
manufacturer-specific).
No additional hardware is needed; the PROFIenergy commands are directly interpreted by the
PROFINET devices.
Principle of operation
At the beginning and end of pauses, the system manager enables or disables the pause
function of the system; then the IO controller sends the PROFIenergy command
"Start_Pause"/"End_Pause" to the PROFINET devices. The device interprets the contents of the
PROFIenergy command and switches off or back on.
Through other PROFIenergy functions, device information can be accessed during pauses.
The user can use this information in order to optimally time the transfer of the
"Start_Pause"/"End_Pause" command.