Setting The Load Torque Monitoring Function - Siemens SINAMICS V20 Series Operating Instructions Manual

Commissioning
5.6 Function commissioning
Setting parameters
Parameter Function
P1240[0...2] Configuration of Vdc controller
P0210 Supply voltage [V]
5.6.2.9

Setting the load torque monitoring function

Functionality
The load torque monitoring function allows the mechanical force transmission between the
motor and driven load to be monitored. This function can detect whether the driven load is
blocked or the force transmission has been interrupted.
The inverter monitors the load torque of the motor in different ways:
● Motor blocking detection
● Load missing detection
● Belt failure detection
Setting parameters
Parameter Function
P2177[0...2] Delay time for motor is blocked [ms]
P2179 Current limit for no load identified [%]
P2180 Delay time for load missing [ms]
P2181[0...2] Belt failure detection mode
82
Setting
This parameter enables / disables Vdc controller.
= 0: Vdc controller disabled
= 1: Vdc_max controller enabled (factory default)
= 2: Kinetic buffering (Vdc_min controller) enabled
= 3: Vdc_max controller and kinetic buffering (KIB) enabled
Note: This parameter must be set to 0 (Vdc controller
disabled) if a braking resistor is used.
This parameter defines the supply voltage. Its default value
depends upon the type of inverter.
Range: 0 ... 1000
Setting
Defines the delay time for identifying that the motor is blocked.
Range: 0 ... 10000 (factory default: 10)
This parameter defines the threshold current for A922 (load
missing) relative to P0305 (rated motor current).
Range: 0.0 ... 10.0 (factory default: 3.0)
Defines the delay time for identifying that the load is missing.
Range: 0 ... 10000 (factory default: 2000)
The belt failure detection is achieved by comparing the actual
frequency / torque curve with a programmed envelope
(defined by parameters P2182 ... P2190). If the curve falls
outside the envelope, a warning or trip is generated.
= 0: Belt failure detection disabled (factory default)
= 1: Warning: Low torque / frequency
= 2: Warning: High torque / frequency
= 3: Warning: High / low torque / frequency
= 4: Trip: Low torque / frequency
= 5: Trip: High torque / frequency
= 6: Trip: High / low torque / frequency
Operating Instructions, 07/2012, A5E03728167
SINAMICS V20 Inverter