| In addition to the signals direcly connected on the
Process, it is often convenient get information on other systems which have
already carried out 'une mise en forme', a filtering, a calculation
'savant',...
|
-
automats / PLC for the internal variables, variables with
slow variation, alarms, ...
-
gauges of intelligent measurements for the continuous measurements or
for a summary at the end of the product (gauges with X-rays, laser, combined gauges,
...
|
| This type of network is carried out by means of current
communication which we will choose according to their availabilities of the
equipment and to the flow of data to be guaranteed :
|
-
serie (RS232, RS422, RS485)network.
-
ETHERNET network.
|
-
SIEMENS with the SINEC H1.
-
ALSTOM (Ex CEGELEC-ACEC) with the LN3, le HPC.
-
ABB MP200 with the GCOM.
-
INTERBUS.
-
PROFIBUS.
-
AMS ANSALDO.
|
| The connection functuality can be installed on the PC « nearest» or « most available ».
We thus obtain a configuration « of acquisition » similar to this one :
|
 |