Beckhoff TwinSAFE logic FB User Manual

Function blocks
Function blocks for TwinSAFE logic components 171
3.26.3 Application excentric mode
In excentric mode, only one direction of rotation is permitted. The FB checks that after a cycle the position
stops after TDC (top dead center) plus maximum overrun (OverrunMax). The current overrun or position
can be output after TDC (OverrunTDC).
Once standstill is reached, a new cycle is not permitted until a falling edge is detected at the Reset input.
As a further parameter BDC (bottom dead center) is specified with a lower and upper limit
(BDC_LowerLimit and BDC_UpperLimit). The output CamMonOK is immediately set to FALSE if the
press comes to a standstill without having reached or exceeded TDC, or if the direction of rotation is
reversed. If BDC is exceeded the press is in upward movement. This information is output at the
UpwardsMove output of the function block.
The BackwardsMove input is used to notify the function block that backward movement of the press is
permitted. This is only permitted if the position is between TDC1_UpperLimit and BDC_LowerLimit. The
backward movement ends when TDC1_UpperLimit is reached.
3.26.3.1 Schematic diagram of the ranges
Figure 3-115: Excentric mode - schematic diagram of the ranges

Beckhoff TwinSAFE logic FB Specifications

General

Brand	Beckhoff
Model	TwinSAFE logic FB
Category	Industrial Electrical
Language	English