10 years' success in the Middle Kingdom - Sick

The SRM 50: communication,
precision and ease of use in all
TPM applications
The TPM is ideally suited for use, for
example, as a drive for compressing hygiene
articles in packaging; in automatic
feed systems for wood processing
machines and machine tools; as a
drive for dosing pumps; as an axle
drive on spraying robots (there’s an Exprotected
TPM version for use here); or
as a part-turn valve actuator in plants
for producing optical media and semiconductors.
Whatever the application,
the SRM 50 Multiturn motor feedback
system integrated in every TPM unit
ensures bi-directional communication
between the drive and the plant control
system via its standardised Hiperface
interface. Information on commutation
and rotor position is transmitted as absolute
values when the TPM is
switched on, thereafter counting continues
incrementally via sine/cosine
signals. “In this regard, the EEPROM
offers important advantages as a socalled
electronic type label in the
SRM 50”, Siegfried Wallauer mentions
the device’s integrated control system
parameterisation. “Gear and motor
characteristics, and commissioning
data, can be stored here and used for
autonomous setting of TPM parameters.
Programming data for the motor
feedback system, such as resolution or
a shift in zero position, can be stored in
a different EEPROM memory area and
called up from there.”
This feature of the integrated motor
feedback system (which has been tested
and approved by WITTENSTEIN for
connection to more than 20 different
control systems) provides easy and
reliable commissioning of the TPM. The
TPM can also fully exploit the
SRM 50’s resolution of more than
134 m. increments and its high precision
of less than 1 minute of angle.
insightLINK
You can obtain further product information
with the attached card under:
INFO 205
or on the Internet at:
www.sick.de/insight/en
More about the customer:
www.wittenstein.de and
www.sigpacksystems.com
SICK insight 2/2004
The driverless metro in Denmark Applications 13
Easy riding in Copenhagen thanks to LMS
Staying on the go with the
driverless metro
Not only is the metro new for Copenhagen, but also its driverless concept.
The central control system and the metro’s complete automation
could not be completed until laser measurement systems were in place
at each station to provide warnings about objects on the tracks.
New metro system in Copenhagen with
the obstacle detection system
>> The LMS units are an important
component of the obstacle detection
system (ODS). All objects larger than
450 x 450 x 450 mm 3 are detected by
one of the six scanners at each station
and evaluated by the ODS, then a signal
is transmitted to the automatic traffic
alarm control system (ATC).
Great safety reserves
The project’s safety planning was excellent.
The entire system structure (including
the sensors) is designed with
redundancy. Each metro station has its
own warning and visualisation system.
The scanners themselves are designed
for outdoor use and programmed in
such a way that spurious signals are reliably
prevented. All in all, the entire
system has a mean time between failure
(MTBF) of 115 years according to
the system integrator.
So it’s easy riding in Copenhagen: statistically
speaking, the first system
breakdown can be expected in 2119.
insightLINK
You can obtain further product information
with the attached card under:
INFO 206
or on the Internet at:
www.sick.de/insight/en
More about the customer:
www.m.dk
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