Functions
8.14 Free function blocks
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
8-69
8.14 Free function blocks
Data
Parameter range: P2800 … P2890
Warnings: -
Faults: -
Function chart number: FP4800 … FP4830
Cycle time: 128 ms
Description
For many applications, interlocking logic is required in order to control (open-loop) the
inverter. This interlocking logic couples several states (e.g. access control, plant/system
state) to form a control signal (e.g. ON command). Previously this was implemented using
either a PLC or relays. This represented additional costs for the plant or system. In addition
to logic operations, increasingly, arithmetic operations and storage elements are required in
inverters which generate a new unit from several physical quantities. This simplified PLC
functionality is integrated in the SINAMICS G120 using the freely programmable function
blocks (FFB).
The table below shows the function blocks that are integrated in the SINAMICS G120
inverter:
Table 8-28 Free function blocks
No. Type Example
3 AND AND 1
P2800 P2801[0]
A
B
C
&
P2810
r2811
ABC
000
010
100
111
Index0
Index1
3 OR OR 1
A
B
C
P2816
r2817
ABC
000
011
101
111
1
P2800 P2801[3]
Index0
Index1
3 XOR XOR 1
A
B
C
P2822
r2823
ABC
000
011
101
110
1
=
P2800 P2801[6]
Index0
Index1
3 NOT NOT 1
P2828
r2829
1
CA
AC
01
10
P2800 P2801[9]
Index0
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