Setting functions
8.7 Application-specific functions
Inverter with CU230P-2 Control Units
318 Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
Logical and arithmetic functions using function blocks
The free function blocks permit additional signal processing inside the inverter. In order to
use the free function blocks, you must interconnect the inputs and outputs of the function
blocks with the appropriate signals.
The following free function blocks are available:
● Logic AND, OR, XOR, NOT
● Arithmetic ADD, SUB, MUL, DIV, AVA (absolute value), NCM (comparison), PLI (polyline)
● Timers MFP (pulse generator), PCL (pulse shortening), PDE (ON delay), PDF (OFF
delay), PST (pulse stretching)
● RSR (RS flip-flop), DSR (D flip-flop)
● Switches NSW (analog) BSW (binary)
● Controllers LIM (limiters), PT1 (smoothing), INT (integrators), DIF (differentiators)
● Monitoring LVM
Activating and interconnecting free function blocks
None of the free function blocks in the inverter are active in the factory setting.
Proceed as follows to activate a free function block and interconnect with signals:
1. Select the required function block in the List Manual. You can find the parameters to set
the free function blocks in function diagrams 7200 ff. See also: Manuals for your inverter
(Page 446).
2. From an operator panel or via the expert list in STARTER, set the parameters that define
the runtime group of the block to the required value.
The block is now active.
3. If you have assigned several function blocks to the same runtime group, set the
parameter that defines the execution sequence within the runtime group.
4. Interconnect the inputs and outputs of the function block with the required signals in the
inverter.
You have activated a free function block and interconnected its inputs and outputs.
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