Normal Operation - Pilz PMCtendo DD5 Operating Manual

Function description
Behaviour of the safety function STO
The safety function STO activates the pulse disabler on the servo amplifier and removes
the power to the motor.
4.5.1

Normal operation

The behaviour of the servo amplifier always depends on the current setting of various para-
meters (e.g. ACTFAULT, VBUSMIN, VELO, STOPMODE, see commissioning software's
online help).
The diagram below illustrates the correct functional sequence when switching the servo
amplifier on and off.
U
24 V
U
BTB/RTO
U
L1,L2,L3
U
Intermediate
circuit
U
STO-ENABLE
U
HW-ENABLE
SW-ENABLE
n
Motor
speed
U
Output stage
enable
(internal)
Fig.: Switching on and off under normal conditions
Servo amplifiers on which the "Holding brake" function has been enabled have a separate
procedure to switch off the inverted rectifier (see section in this chapter entitled "Motor hold-
ing brake").
The drive is shut down safely using the safety function STO.
Operating Manual PMCtendo DD5
1002236-EN-04
<15 s (Boot-time)
~ 500 ms
>100 ms
t
t
t
t
5...8 min
t
t
VEL0
t
t
65