EC32 - Applications
Each productive system is comprised at least of
one application. The term “application” refers to a task in the
system, which communicates with the system or another application-task
via at least one channel. The number of application tasks is not
limited (in theory). An application task may or may not have a number
of 1 through 32 drivers.
For example the display task GD or the index-sequential database
do not have a driver, because they do not communicate to the outside
world.
The term driver refers to a task, which in general provides the
hardware-access-layer for its hosting application task. Due to this
concept, an application task does not need to know, whether it communicates
with the external world through a serial link, an ethernet-system
or any other media.
The following standardized application tasks are currently available:
|
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DBF : provides a mechanism
for storing data into a database based upon an FIFO-priciple. The
number of records is limited only by the available HD-space. No limit
on the number of separate FIFO?s. |
| - |
DBR: provides a mechanism
for storing data into a index-sequential database. Data is retrieved
by keyed access. |
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PMON: a communciation protocoll
defined by Volkswagen, which includes the ISO/OSI layers 3 through
6. |
| - |
8E41: a communication protocoll
defined by Volkswagen, which handles mobile ID-tags. |
| - |
RK512: a communication protocoll
defined by Siemens |
| - |
GD: an application for video
output |
| - |
GDT: an video application
with touch-screen capability |
| - |
plus a large number of specific
applications used for interfacing to PLC, as data collection applications
or other industrial purposes. |
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