Function Description
Operating Manual PMCprotego D.48, PMCprotego D.72
1001735-EN-04
87
Motor output P
M
Motor circuit brake resistor R
M
20 kW - 40 kW 0.33 Ω (600 W) 1000 V
P
M
= (M
0
* n
n
) / 9550
where:
} P
M
: Motor output [kW]
} M
0
: Standstill torque [Nm]
} n
n
: Rated speed [1/min]
4.6.3 Stop Category 2
A controlled stop, with power left available to the machine actuators.
Drive-integrated solution
The safety card PMCprotego S from Pilz is used to implement a controlled stop of stop
category 2. The safety function "Safe stop 2 – SS2" (Safe Stop 2) must be activated then.
Information on the safety card PMCprotegoS is available in the download area
www.pilz.com.
As an alternative, the stop category 2 can be implemented via the control function with aux-
iliary contactors, as described in the following example.
The machine receives the operational stop command (disable) and brakes the drive using
the set braking ramp (STOPMODE and ACTFAULT parameters set to “1”).
} The drive is braked in a controlled manner as it comes to a stop. If the speed VEL0
(see timing diagram in the section entitled “Switch on/switch off behaviour”) drops be-
low the set value, the holding brake is applied and the servo amplifier is shut down. In
this case, the mains voltage is maintained.
} If the mains is switched off, not only is a controlled braking procedure initiated but the
mains voltage is galvanically isolated from the holding brake after a delay, which can be
set on the timer.
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General