Signal Function
Feedback signal, "prewarning
time T
1
expired"
This signal is set by the basic PLC program (FB15) if the timer has expired and the pre‐
warning is output on the HMI.
Feedback signal, "prewarning
time T
2
expired"
This signal is set by the basic PLC program (FB15) if, after the prewarning limit has been
reached, also the prewarning time of the corresponding energy profile has expired. This
means that this signal is equivalent to the information "Energy-saving state active".
Note
Shutdown auxiliary equipment
If auxiliary equipment is also to be shut down using the "Prewarning time expired" signal, which
acknowledges the shutdown process, then using a normal PLC timer and the signal "PLC user
program signal", a monitoring function can be installed in the basic PLC program. If the auxiliary
equipment has still not been run down after the PLC timer has expired, then the energy-saving
state can be exited again using the "PLC user program signal".
4.1.5 Interface signals 840D sl
4.1.5.1 Signals for controlling energy-saving profiles
Dynamic data are cleared when the control powers up.
The signals described in the following section refer to energy-saving profile 1.
Control signals (user program)
DB1000
DBX0.0 Directly activate energy-saving profile
DBX0.1 Set time to prewarning limit
Control signals (HMI)
DB1000
DBX1.0 Directly activate energy-saving profile
Signals to check the energy-saving state (user program)
DB1000
DBX2.0 Master computer prohibits energy-saving state
DBX2.1 PLC user program signal prohibits energy-saving state
Ctrl-E Profiles
4.1 Commissioning the PLC for Ctrl-E Profiles
Ctrl-Energy
44 System Manual, 01/2015, 6FC5397-0EP40-5BA2
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