Appendix
A.5 Interconnecting signals in the inverter
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
497
Where can you find additional information?
● This manual suffices for assigning a different meaning to the digital inputs.
● The parameter list in the List Manual is sufficient for more complex signal
interconnections.
● The function diagrams in the List Manual provide a complete overview of the factory
setting for the signal interconnections and the setting options.
Example
Moving a basic control logic into the inverter
A conveyor system is to be configured in such a way that it can only start when two signals
are present simultaneously. These could be the following signals, for example:
● The oil pump is running (the required pressure level is not reached, however, until after 5
seconds)
● The protective door is closed
To implement this task, you must insert free function blocks between digital input 0 and the
command to switch on the motor (ON/OFF1).
Image A-7 Example: Signal interconnection for control logic
The signal of digital input 0 (DI 0) is fed through a time block (PDE 0) and is interconnected
with the input of a logic block (AND 0). The signal of digital input 1 (DI 1) is interconnected to
the second input of the logic block. The logic block output issues the ON/OFF1 command to
switch-on the motor.
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