SIEMENS
SINAMICS G180
Configuring instructions
Functions
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Siemens D 18.1 · 2014
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Overview
(continued)
Safety Integrated functions
The safety functions integrated in SINAMICS G180 converters
provide highly effective application-oriented protection for
personnel and machinery.
When equipped with one of the options
G04
,
G05
or
G08
,
SINAMICS G180 converters provide the following Safety
Integrated function (terms defined according to IEC 61800-5-2):
•
Safe Torque Off (STO)
The Safety Integrated function is implemented electronically and
therefore offers short response times in comparison to solutions
with externally implemented monitoring functions.
Legal framework
Machine manufacturers and plant constructors must ensure that
their machines or plants cannot cause danger due to malfunc-
tions apart from the general risks of electric shock, heat or radi-
ation. In Europe, for example, compliance with the machinery di-
rective is legally stipulated by the EU industrial safety directive.
In order to ensure compliance with this directive, it is recom-
mended that the corresponding harmonized European stan-
dards are applied. This initiates the assumption of conformity
and gives manufacturers and operators the legal security when
complying with both national regulations and EU directives. The
machine manufacturer uses the CE labeling to document the
compliance with all relevant directives and regulations in the free
movement of goods.
Safety-related standards
Functional safety is specified in various standards.
EN ISO 12100 and EN ISO 14121-1, for example, are con-
cerned with the design and risk assessment of machines.
EN 62061 (only applicable for electrical and electronic control
systems) and EN ISO 13849-1 define the functional and safety-
related requirements of safety-oriented control systems.
The above-mentioned standards define different safety require-
ments that the machine has to satisfy in accordance with the risk,
frequency of a dangerous situation, probability of occurrence
and the opportunities for recognizing impending danger.
•
EN ISO 13849-1: Categories B, 1 … 4
•
EN ISO 13849-1: Performance Level PL a … e
•
EN 62061: Safety Integrity Level SIL 1 … 3
Software and protective functions
Description
Display
The bilingual, four-line graphical display with membrane keyboard on the converter
shows operational messages, alarms and fault messages in plain text. The converter
can be operated locally by means of this display.
Event memory
A comprehensive memory function for storing the last 64 events, including actual values
recorded prior to and during each event, aids the evaluation and analysis of faults.
Time synchronization and operating hours counters
Timing functions can be synchronized with an external clock via digital inputs.
Two different counters, one for frequency converter operating hours and the other
for fan operating hours, can supply important information to the service engineer.
Motor protection
Motor protection through evaluation of a KTY84, PTC or Pt100 temperature sensor.
When a KTY84 sensor is connected, the limit values can be set for alarm or shutdown.
When a PTC thermistor is connected, the system reaction to triggering of the thermistor
(alarm or shutdown) can be defined.
Motor blocking protection
A blocked motor is detected and can be protected against thermal overloading by a
fault trip.
Noise reduction
Optimization of the pulse pattern can minimize motor noise emissions and also reduce
motor losses.
Brake optimization
An oversaturation control system is provided to ensure optimum braking performance
without the need for any additional equipment.
A parameterizable DC braking function is also provided to permit precise deceleration
down to zero speed.
Operational reliability
In order to ensure smooth reliable operation, the converter is equipped with an
automatic overload time adaptation function and stall protection implemented by a
tried-and-tested current limitation control system.
Fault detection
Automatic monitoring for irregularities in operation, e.g. overspeed, underspeed or
no-load. These conditions can be detected and signaled by appropriate alarms.
Fault suppression
Fault messages and fault trips initiated by fault messages can be suppressed
(e.g. for smoke extraction motors).
Power unit protection
Ground fault monitoring at output end
A ground fault at the output end is detected by a total current monitor and
results in shutdown in grounded-neutral systems.
Insulation monitoring
The insulation can be monitored for ground faults on converters operating on a
non-grounded power supply system.
Current asymmetry monitoring at output end
A current symmetry monitoring system detects hazardous current unbalances and
initiates a fault trip if necessary.
Electronic short-circuit protection at the output end
A short-circuit at the output (e.g. at the converter output terminals, in the motor cable or
in the motor terminal box) is detected and the converter shuts down with "fault".
Thermal overload protection
When the overtemperature threshold monitor responds, an alarm is output initially and
the clock frequency is reduced. If the temperature continues to rise, the current limit
values are lowered in order to reduce the thermal load. Once the cause of the fault has
been eliminated (e.g. cooling has been improved), the original operating values are
automatically resumed.
© Siemens AG 2014