Beckhoff TwinSAFE logic FB User Manual

Function blocks
Function blocks for TwinSAFE logic components 63
The following diagram shows the behavior of the MON function block; the rising edge of the Restart
occurs before the rising edge of the MonIn inputs. The Start state (FB state 6) is only assumed if both
signals are TRUE. The output is enabled with the falling edge at the Restart input. At least one of the
EDM inputs of the FB is active.
RESTART
MonIn
MonOut
EDM
FB State
State 1
State 3
State 6
State 1
In the following diagram the Restart is set to TRUE before the MonIn event takes place. With the falling
edge of the MonIn input, the EDM signal is immediately checked due to the Restart input signal. This
immediately leads to an EDM error and to the shutdown of the entire TwinSAFE group. At least one of the
EDM inputs of the FB is active.
RESTART
MonIn
MonOut
EDM
FB State
State 1
State 4 (Error – Diag 0001 0000)

Beckhoff TwinSAFE logic FB Specifications

General

Brand	Beckhoff
Model	TwinSAFE logic FB
Category	Industrial Electrical
Language	English