The Interests Group SERCOS interface e. V. (IGS), have
set themselves the task, to provide all companies interested
with this digital interface for communication between
numerical controls and drives under the name of SERCOS
interface, established as International Standard IEC 61491
and European Standard EN 61491 and supervise their compliance
with the association mark.
Tel: + 49 (0) 711 284 57-50
Fax + 49 (0) 711 284 57-55
SERCOS interface, the digital drive interface, has become
a worldwide accepted networking standard for distributed
motion control applications over the last decade. SERCOS
is particularly interesting due to its outstanding technical
features like real time capabilities, performance, noise
immunity, and last but not least a very large variety
of products and suppliers. The formula for the Third SERCOS
generation is therefore: 'Combining Ethernet's physics
and protocol with the proven mechanisms of SERCOS interface'.
This combination offers new and innovative options for
the future automation technology.
SERCOS interface, the unique worldwide standardized (IEC
61491 and EN61491) digital interface for a communication
between control systems and drives. This, for the first
time, allows the realization of numerically controlled
high-performance applications in the machine tool engineering.
An optical fibre ring is used as transmission medium.
The maximum transmission rate with the new SERCON 816
ASIC is 2, 4,8 or 16 Mbit/s, depending on the device design.
Basically three communications types between CNC and
digital drive control elements can be realised with this
- transmission of nominal position
- transmission of nominal speed or
- transmission of nominal torque
The transmission of the nominal position proved to be
the best solution for fast and highly precise applications.
In one optical fibrs ring up to 6 axes can be cyclically
and parallel supplied with new nominal positions values
(nominal positions) every 0,5 ms . The SERCOS interface
allows all drive-internal data, parameters and diagnosis
data to be displayed and entered by means of a SERCOS-compatible
- Noise free transmission via optical fibre
- Digital interface
- International Standard
- Standardized, worldwide established interface (EN/IEC
- High transfer rate - up to 16 Mbit/s
- Meticulous synchronisation of all nodes in the SERCOS
ring (especially for coordinated multi-axes applications)
- Cycle time configurable (typically: 1 msec.)
- Ring structure with up to 254 nodes and reduced wiring
- More than 70 suppliers worldwide offering SERCOS interface
- Standardised operating data and commands provide
interoperability of devices made by different manufacturers
- Connecting controls, drives and E/A stations via a
high-speed serial communications bus