Instruction Manual

Safety engineering
Safety functions
Safe stop 1
1
1.3
1.3.4

1.3-7
EDS94AYAD EN 2.2
1.3.4 Safe stop 1
1.3.4.1 Description
Safe Stop 1 / SS1
This function corresponds to a ”Stop 1 ” according to EN 60204.
When this function is used, the motor is stopped within an adjustable
stopping time. The complete function sequence cannot be deactivated.
When the speed n = 0 is reached or the stopping time elapses, the power
supply of the motor is immediately safely interrupted (STO), depending on
which event occurs first. The motor cannot create torque and thus no
dangerous movements of the drive can occur. Additional measures, e.g.
mechanical brakes are needed againstm ovements causedby external force.
Priority function: STO
Subordinated function: None
t1 t2
t
S
t
n
0
1
t
0
'1'
0
SMxDIASS1
 Input signal of the request of a safety function
’1’ Logic signal level ”1” / ”true”
 Speed characteristic n of the motor
tx Action instant
t
S
Monitored stopping time
–– Normal operation
--- Incorrect operation
tTimeaxis