Protective Equipment - Siemens SINAMICS S120 Function Manual

Basic functions
7.13 Motor Module as a Braking Module
Operating a parallel connection in master/slave mode
Motor Modules connected in parallel can also be operated in master/slave mode.
1. To do this, use parameter p1330 to transfer the input of the V/f characteristic to the next
power unit.
The slaves only receive the voltage setpoint for the V/f characteristic.
7.13.4

Protective equipment

The protection functions are explained in detail in Section Thermal monitoring and overload
responses (Page 636). Additional protective devices include:
● Ground fault
Monitoring of sum of all phase currents.
● Cable break
An unbalanced load of 20 % and more produces a non-symmetrical current, which is
detected by the I
– Alarm A06921 is output if phase non-symmetry is detected.
– The errors are located in parameter r0949:
– Fault F06922 is output if phase failure is detected.
● Overcurrent
The Imax controller is active. The setpoint is stored in parameter p0067.
● Overtemperature of the resistors
The temperature is monitored using bimetal temperature switches mounted on the
resistors.
Configuring temperature evaluation contacts
1. Switch the temperature evaluation contacts of all 3 resistors in series.
2. Connect the temperature evaluation contacts to the temperature sensor evaluation of the
Motor Module (terminals X41.3 and X41.4).
3. For the temperature monitoring, set the temperature sensor via Motor Module
(p0600 = 11).
4. Set sensor type "Bimetallic NC contact warning & timer" as motor temperature sensor
(p0601 = 4).
5. Parameterize the temperature sensor evaluation of the Motor Module as "external fault".
356
T monitoring.
2
Parameter r0949 = 11 Wire break phase U
Parameter r0949 = 12 Wire break phase V
Parameter r0949 = 13 Wire break phase W
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive functions