Preconditions And Constraints; General Conditions; Permissible And Prohibited Applications - Siemens SINAMICS G120 Function Manual

Description

2.3 Preconditions and constraints

2.3 Preconditions and constraints
2.3.1

General conditions

Prerequisites for using fail-safe functions
1. The machine risk assessment (e.g. in compliance with EN ISO 1050, "Safety of
2. The closed-loop speed control of the inverter must function properly. Each fail-safe drive
3. Once the machine has been successfully commissioned, you must review the typical
Permissible control modes for using fail-safe functions
When the above-mentioned conditions are fulfilled, all of the fail-safe functions can be used
for both V/f control and vector control.
Permissible motors for using fail-safe functions
When the above-mentioned conditions are fulfilled, all of the fail-safe functions can be used
for induction motors from SIEMENS and other manufacturers.
2.3.2

Permissible and prohibited applications

The safety function STO may be used without any restrictions in all applications.
Suspended loads
If the motor can be accelerated by the mechanical system of the connected machine part
after the motor has been switched off, encoderless safety functions SS1 and SLS must not
be used.
Whether or not a mechanical brake is installed is irrelevant here.
18
machinery - Risk assessment - Part 1: Principles") allows inverter safety functions to be
used in accordance with SIL 2 or PL d.
train must be set up in such a way that all the operating procedures performed by the
driven machine can be properly monitored and that the inverter operates below its limit
values (for current, temperature, voltage, etc.). The drive train comprises an inverter,
motor, brake and driven machine. The performance and parameters of the inverter must
be compatible with both the connected motor and the application in question.
operating conditions and operate the machine close to the permissible limit values. The
fail-safe inverter must not malfunction during this test.
WARNING
Safety Integrated Function Manual, SINAMICS G120
Function Manual, 07/2010, FW 4.3.2, A5E03052391B AA