Beckhoff TwinSAFE logic FB

Function blocks
170 Function blocks for TwinSAFE logic components
Sample position sensing
In the following sample position sensing takes place via 2 separate encoder systems. Scaling and
verification takes place within the TwinSAFE logic. It is important that the encoder systems use a different
procedure for determining the position and are mechanically decoupled. The user should consider shaft
breakage detection in the mechanical configuration. One channel (here: sin/cos encoder) is transferred to
the EL6910 logic via the TwinSAFE SC technology. The second channel is transferred via the standard
EtherCAT communication of the EL6910.
Sin/Cos Encoder
(TwinSAFE SC)
Encoder (not Sin/Cos)
Example for Logic program within the TwinSAFE Logic EL6910
Further
processing
within the logic
Figure 3-113: Schematic diagram of the configuration
Encoder
Sin/Cos
EL5021-
0090
PC
BlackChannel
Position
EL6910
Encoder
not Sin/Cos
Standard Fieldbus
Position
Figure 3-114: Schematic diagram of the configuration