Siemens Sinamics G120 CU240E, Operating Instructions Manual, Page: 145 / 238

Functions
5.10 Technological functions
Frequency inverter
Operating Instructions, 08.10. 2008, t.b.d.
145
5.10.5 Logical and arithmetic functions using function blocks
Description
Additional signal connections in the inverter can be established by means of free function
blocks. Every digital and analog signal available via BICO technology can be routed to the
appropriate inputs of the free function blocks. The outputs of the free function blocks are also
interconnected to other functions using BICO technology. The following free function blocks
are available: Adders, subtracters, multipliers, dividers
Example:
You want to activate the motor via digital input 0 and digital input 1:
1.
To do so, interconnect the status signals of digital inputs r722.0 and r722.1 with the
inputs of a free OR block via BICO.
2. Now activate the OR block.
3. Finally, interconnect the OR block output with the internal ON command (P0840).
Table 5- 46 Parameters for using the free function blocks
Parameter Description
P2800 = … General enable signal for all function blocks
0: disabled
1: enabled
P2801 = …
P2802 = …
Activation of the individual function blocks
P2803 = … Activation of an 8 ms time slice for calculating the activated function blocks
0: All function blocks are calculated with a 128 ms time grid
1: Some of the function blocks can be calculated with an 8 ms time grid.
For more information about this function, see function diagrams 4800, 4810, 4820, and 4830
in the List Manual.