Example; A.6.2 Example - Siemens sinamics G120 Operating Instructions Manual

Appendix
A.6 Interconnecting signals in the inverter
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.
A.6.2

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
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.
Setting the control logic
Parameter
p20161 = 5
p20162 = 430
p20032 = 5
496
Example: Signal interconnection for control logic
Description
The time block is enabled by assigning to runtime group 5 (time slice of
128 ms)
Run sequence of the time block within runtime group 5 (processing before
the AND logic block)
The AND logic block is enabled by assigning to runtime group 5 (time
slice of 128 ms)
Operating Instructions, 01/2016, FW V4.7 SP6, A5E31759476B AE
Converter with CU250S-2 Control Unit