Signal Function
Data transfer active
(state condition "No communi‐
cation with an external device
active (USB, Ethernet, V24)")
This signal is set if data is being transferred. After completion of the data transfer, the HMI
resets this bit. This includes the use of a USB memory medium, a V24 connection or a
network drive.
This signal is also set when generating or importing a commissioning archive. This signal
is only available once for each control system and is automatically linked through the mask‐
ing. In the case of several operating stations, the group signal is formed. Acyclic S7 com‐
munication in the sense of a connected engineering system or an external HMI does not
apply as data transfer in the sense of this signal.
Screen change active
(state condition "No screen
change realized")
This signal is set if a screen is being changed. After processing, the PLC resets the bit.
This signal is only available once for each control system and is automatically linked through
the masking. For several operator stations, the group signal is formed here.
Generated by the PLC basic program (828D: PLC firmware)
Machine control panel used
(state condition "No key press‐
ed on the machine control pan‐
el")
This signal is set if the machine control panel in the PLC is used. To do this, a specified
address range of the inputs is monitored in the PLC.
● For 840D sl, the ranges addressed via parameters DB7 MCP1In and MCP2IN
● For 828D, the input range of the PN-MCP
This signal is only available once for each control system and is automatically linked through
the masking. The group signal is formed when several machine control panels are being
used.
NCK activity
(state condition "NC channel/
channels in reset")
This signal is set if the NCK channel is not in the Reset channel state.
Note: Static synchronized actions, which are also active in the Reset channel state = TRUE,
are not detected and must be taken into account by the user.
From the PLC user program interface
Master computer prohibits
(state condition "master com‐
puter signal prohibits")
Using this signal, an external master computer or a coupled control system can prevent
that the energy-saving profile is activated. This signal is available in the user interface for
each energy-saving profile.
PLC user program signal
(state condition "PLC user sig‐
nal prohibits")
Using this signal, from the user program in the PLC, an energy-saving profile can be pre‐
vented from being activated. This signal is available in the user interface for each energy-
saving profile.
4.1.4 PLC user program
The following signals are available in the user program for controlling the energy-saving
profiles. These signals are not masked within the energy profile, and are available for each
profile.
Signal Function
Control signal to "directly acti‐
vate the energy-saving profile"
The energy-saving profile is immediately activated when this signal is set. The two timers
are set to zero. For the case that the energy profile has already been activated, no change
is made.
Set time to prewarning limit When setting this signal, the timer for the prewarning limit T
2
is set to its setpoint and is
then restarted. This is also the case, even if the energy-saving profile is already active. The
activation is then reset, and after the prewarning time is set again.
Ctrl-E Profiles
4.1 Commissioning the PLC for Ctrl-E Profiles
Ctrl-Energy
System Manual, 01/2015, 6FC5397-0EP40-5BA2 43
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