Siemens CU240B-2 Function Manual

5.12.1.3 Setting encoderless actual value sensing
Precondition
You are online with STARTER or Startdrive.
Procedure with STARTER
To set the encoderless actual value sensing, proceed as follows:
1. Press the "Configuration" button.
A
%
A
&
'
$


2. Press the "Mechanical configuration" button.
Set the following:
– (A) Actual value tolerance:
In most cases, you do not have to change this value. If, in operation, the inverter issues
message C01711 or C30711 (fault value 3 or 44 … 57), increase this value step-by-step
until the message to longer occurs.
Note: If you increase this value, the speed monitoring of the inverter becomes less
sensitive to limit violations.
– (B), (C), (D) Gearbox ratio:
Read the number of pole pairs (D) of the motor, and set the data of your machine
according to the following table.
Number of load revolutions Number of motor revolutions
Without gear Value (B) = 1 Value (C) = number of pole
pairs (D)
Gearbox with speed ratio
Load/motor = L/M
Value (B) = L Value (C) = M x number of pole
pairs (D)
– Example: The drive has a gearbox with a load/motor speed ratio = 23/50
⇒ Value (B) = 23, value (C) = 50 × number of pole pairs (D)
3. Close the screen forms.
4. Press the "Configuration" button.


Commissioning
5.12 Setting extended functions
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD 151

Siemens CU240B-2 Specifications

General

Brand	Siemens
Model	CU240B-2
Category	Inverter
Language	English