Siemens CU240B-2 - Enable Safe Torque Off Safety Function

Commissioning
4.3 Commissioning
Converter with Control Units CU230P-2; CU240B-2; CU240E-2
Getting Started, 04/2014, A5E32885834B AB
41
Procedure
To identify the motor data, proceed as follows:
1. Switch on the motor. You can enter the on command via the terminal strip, fieldbus, or
operator panel.
2. Wait until the inverter switches off the motor after completion of the motor data
identification. The measurement takes several seconds.
3. Backup the results of the motor data identification in the inverter so that they are not lost
when the power fails: TOOLS - PARAMETER SETTINGS - SAVE RAM TO ROM
If you have also selected a rotating measurement in addition to the motor data identification,
then the inverter again issues the alarm A07991.
1. Switch the motor on again in order to optimize the speed control.
2. Wait until the inverter switches off the motor after completion of the optimization. The
optimization can take up to one minute.
3. Backup the results of the motor data identification in the inverter so that they are not lost
when the power fails: TOOLS - PARAMETER SETTINGS - SAVE RAM TO ROM
You have now identified the motor data and the closed-loop speed control has been
optimized.
4.3.2
Enable "Safe Torque Off" safety function
Requirements:
● Commission a CU240E-2 Control Unit.
● In the basic commissioning, you selected a setting for the interfaces in which two
terminals are reserved for a safety function.
The "Basic Safety" wizard guides you through the enabling of the "Safe Torque Off" safety
function. Depending on the interface for "Safe Torque Off", the inverter skips individual
steps.
Note
If you enable "Safe Torque Off" via digital inputs, then
the inverter interconnects digital inputs
DI
4 and DI 5 to the fail-safe digital input F-DI. The drive can respond unexpectedly if you
additionally interconnect these same inputs with other functions.
•
Use digital inputs DI 4 and DI 5 exclusively for "Safe Torque Off".