1 introduction, 1introduction – ADLINK PCI-7856 User Manual
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Introduction
1
1
Introduction
Considering the advancement of the industrial machine automa-
tion field, designers not only use centralized control systems but 
also need a distributed solution to develop more complex machine 
applications. Distributed solutions provide many benefits such as 
lower maintenance, reduced wiring and a vast number of modules 
that are easy to integrate. Motionnet and HSL technologies are 
innovative distributed motion and I/O technology that enable time-
deterministic scanning of thousands of I/O points in milliseconds 
using master-slave architecture. The Motionnet bus further 
improves distributed motion control capability by providing control 
axes up to 256 axes and minimal command execution time for sin-
gle axis control.
The PCI-7856 is a PCI interface card which offers two ports for 
Motionnet and HSL systems for distributed motion and I/O in 
machine automation applications.
HSL technology allows thousands of I/O points to be scanned at 
the millisecond-level in real time by using mater-slave architec-
ture. Commercial Ethernet cables with RJ45 connector are used 
for simplified setup of the HSL slaves modules as close as possi-
ble to sensor devices which results in a dramatic reduction of wir-
ing. System integrators can benefit from HSL network because it 
integrates discrete I/O and analog I/O modules. This local network 
features rapid response, real-time scanning. 
A Motionnet system (referred to as“MNET”) is a distributed motion 
solution for machine systems. MNET is an innovative distributed 
motion technology which provides distributed motion axis control 
of up to 256 axes for any servo / stepper motor controlled using 
mater-slave architecture. This not only provides general purpose 
4-axes motion control, but also allows specific 64 of single axis 
motion control module to be scanned in millisecond-level in real 
time.