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| Process
Visualisation |
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Example (demo) application image containing
| static
image |
3D
for excellent overview with few descriptive labels |
dynamic
display
objects |
lamps,
analog and digital instruments, history curves, switched and moving images |
| actuators |
push
bottons, switches, rotary switches see below |
| setvalue
entry |
including
desk top calculator, text entry, analog pots see
below |
| database |
for
recipe etc. storage, indexed and numbered databases |
| alarm
display |
static
or hidden window, coming/going |
| protocol |
to
printer and textfile upon remote command or change of value |
|
| Multiuser
DOS for speed and reliability |
MEG-Graph uses 640x480x16
VGA for high speed display of real time processes.
It is dedicated
for Multiuser DOS (REAL/32)
where up to 8 incarnations run simultaneously
without Windows
overhead. A multitude of DOS application programs may run on the same PC
simultaneously on the virtual screens.
MEG-Graph
is made for continuous operation 24 hours a day without any system crashes. |
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| Images |
An
unlimited count of different pictures allows overview and detailed survey
of the machines or plants. The pictures can be quickly loaded on demand
on any of the up to 8 virtual multitasking screens or selected quickly
by switching the virtual multitasking screens. This avoids the time and
power consuming windows approach and yields much better visibility and
clarity. |
| Interface |
The
PC is connected to other computers and especially to logical controllers
with an ARCnet interface, other connections (serial port) are available.
The physical action on relays and setvalue operators is performed
external to the PC, and the process flow is controlled by a dedicated computer
(eg. ATLAN). These controllers and computers also decide how to display
the values and how to act on the commands in real world. The visualisation
program is not intelligent but only a display and entry tool similar to
a front panel. Its major benefit is its modularity and capability of easy
modifications and expandability. |
Image
creation |
Pictures
are created with text files similar to a high level language source code.
Lines and arcs, filled polygons and dynamic objects are drawn using procedure
calls with parameters. The compiler allows variables and constants, nested
if - else - endif constructions and macros.
Bitmap
and AutoCAD slide pictures can be included for the static background and
for animated objects. This technology is ideally suited for good programmers
and it makes the program very cheap ( < 1k$) and versatile. We help
you creating your first pictures. |
| flexibility |
numerical
values in byte- 16- and 32-bit integer format, (un)signed, Intel and Motorola/S5+7
byte-swapped format, several Real-number types and BCD. All intermixed,
for instruments and set value objects.
Available for various
European languages, customizable fonts and error messages / help texts. |
Special
functions |
Instruments
are fully scalable, also the set value objects. Real time math functions
including linear interpolation can be programmed and used even by external
controllers, which have no math. Database records can be read and written
remotely. As all MEG-programs the visualisation program MEG-Graph
has a built in desktop calculator with Adam-Riese notation (with parentheses
and math funcs) for online entry of "formulae". Slavic characters (haceks)
on demand. |
 |
A demonstration picture to show
the flexibility of MEG-Graph. Low level PLC functionality is included for
convenience.
. |
| - |
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In this example the background image is
a scanned picture, dynamic objects (lamps, buttons, instruments ...) are
inserted with procedure calls as usual. Clicking in the switch fields (AUSLAUF,
REVOLVER, EINLAUF) will load another screen with detailed objects.
The * switch opens a menu for all available
(programmed) screens.
. |
| - |
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In the inn,
a somewhat unconventional application of MEG-Graph.
Keys are
big for touch screen convenience.
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|
.
For a demo disk
(plain DOS, working program) send
a mail (aux download
site)
MEG-Graph
and ARCnet
on the prof.
URL
REAL/32
Multitasking OS
legendum
(more tech.articles)
why
not Windows
. |
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