Monitoring The Driven Load - Siemens SINAMICS G115D Operating Instructions Manual

Parameters for Vdc_max control
The parameters differ depending on the motor control mode.
Parameter for
U/f control
p1280 = 1
r1282
p1283
p1294
p0210
For more information about this function, see the List Manual (function diagrams 6320 and
6220).
6.25

Monitoring the driven load

In many applications, the speed and the torque of the motor can be used to determine
whether the driven load is in an impermissible operating state. The use of an appropriate
monitoring function in the converter prevents failures and damage to the machine or plant.
Examples:
• For fans or conveyor belts, an excessively low torque can mean a broken drive belt.
• For pumps, insufficient torque can indicate a leakage or dry-running.
• For extruders and mixers, an excessive torque together with low speed can indicate
machine blockage.
SINAMICS G115D distributed drive
Operating Instructions, 12/2020, FW V4.7 SP13, A5E48681219B-002
Parameter for
vector control
p1240 = 1
r1242
p1243
p1254
p0210
Overview of the manuals (Page 542)
Description
VDC controller configu-
ration
Vdc_max control
switch-on level [V]
Vdc_max control dy-
namic factor [%]
Vdc_max control auto-
matic ON level sensing
Unit supply voltage [V]
Advanced commissioning
6.25 Monitoring the driven load
Setting
0: VDC controller is disabled (factory
setting)
1: VDC controller is enabled
DC-link voltage value above which the
Vdc_max control is activated.
Scaling closed-loop control parameters
p1290, p1291 and p1292.
Factory setting: 100
0: Automatic detection disabled
1: Automatic detection enabled
Factory setting: dependent upon the
converter
If p1254 or p1294 = 0, the converter
uses this parameter to calculate the
switch-in thresholds of the Vdc_max
control. Set this parameter to the actual
value of the input voltage.
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