User's Manual

Dynamic series description
Safety functions
AUTEC - Dynamic Series
LIUDYN2AC0-00_eng.fm User manual
9
3.6 Safety functions
Autec radio remote controls are equipped with some functions that provide high
safety levels, in order to safeguard the safety of people and property.
3.6.1 Stop function
The stop function brings the machine to a safe state every time it is necessary to
stop it due to a potentially hazardous situation. This function is either voluntarily
enabled by the user (active stop), as appropriate, or it cuts in automatically and
autonomously (passive stop).
Active stop
Active stop is a function enabled by the STOP pushbutton (see paragraph 12.4).
The transmitting unit sends to the receiving unit a command that immediately
stops the machine. When the STOP pushbutton is pressed, the machine stops in
shorter time than when passive stop cuts in.
Passive stop
Passive stop is a function that cuts in when a fault occurs during operation. When
the radio link is incorrect or interrupted, the receiving unit autonomously stops the
radio remote control. The cut-in time of this function (passive stop cut-in time) is
set by the machine manufacturer (see technical data sheet).
3.6.2 Protection against unintended movements from the standstill position
(UMFS)
This safety function protects the system “machine+radio remote control” from un-
intended movements, namely machine movements not activated intentionally by
the user, but resulting from possible electrical and mechanical failure of the radio
remote control.
Such safety function checks the neutral (rest) position of the actuators that control
the machine's movements. Each time one of those actuators is operated, the
transmitting unit sends both the movement command and the “SAFETY” com-
mand. Depending on the specific application, outputs related to these commands
are wired in series; alternatively the SAFETY command's outputs drive the safety
device provided on the machine.