Advanced commissioning
7.7 Application-specific functions
Free function blocks
7.7.7.1
The free function blocks permit configurable signal processing in the inverter.
The following free function blocks are available:
● AND, OR, XOR, and NOT logic
● RSR (RS flip-flop), DSR (D flip-flop) flip-flops
● Timers MFP (pulse generator), PCL (pulse shortening), PDE (ON delay), PDF (OFF
delay), and PST (pulse stretching)
● ADD (adder), SUB (subtractor), MUL (multiplier), DIV (divider), AVA (absolute value
generated), NCM (comparator), and PLI (polyline) arithmetic functions
● LIM (limiter), PT1 (smoothing), INT (integrator), DIF (differentiator) controllers
● NSW (analog) BSW (binary) switches
● LVM limit value monitoring
The number of free function blocks in the inverter is limited. You can only use a function
block once. The inverter has 3 adders, for instance. If you have already configured three
adders, then no other adders are available.
Further information
Example
You can find an example for using the free function blocks in Chapter Interconnecting signals
in the inverter (Page 304).
Application description for the free function blocks
See also: FAQ (http://support.automation.siemens.com/WW/view/en/85168215)
Converter with control units CU240D-2
200 Operating Instructions, 04/2015, FW V4.7.3, A5E34262100B AB
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