EXAMPLES OF NETWORKING
Constellations can basically be produced by con-
necting identical interfaces together. This functions
without problems for the control unit, modems, in-
terface converters and chromatographs. Additional
software is required in certain cases:
Server software and interface drivers are required
for networks with server PCs
Interface drivers and software in the control system
are required for the connection to control systems.
The examples on this page show a number of fre-
quently used constellations up to a complex network:
Local operation
Networks without server
Networks with servers, also with modems
Redundant networks
NOTE:
Digital and analog process signals from external devices can
be networked to the chromatographs. They are connected to
the chromatographs via digital and analog inputs and pro-
cessed using BASIC programs.
Server PC
Server PC
Control PC
RS232
TTY
TTY
Schniko
Switched modem
Schniko
Telephone line
RS232
Control PC
Switched modem
Control PC
RS232
Modbus
Modbus
RS232
RS232
RS485
RS485
TTY
TTY
with DF32 and Schniko-2
with DF32 and Schniko-2
PGC 302 PGC 302
HONEYWELL
Control system
TDC3000
Double ChromLAN with stationary control PC
RS485
RS485
Single ChromLAN with stationary control PC
RS485
Control PC
with Schniko-2
RS232
Control Pc
Local operation
to
Chromatograph
Chromatographs
Chromatographs
No. 1 No. 2 No. 15
to
No. 2/1
No. 1/2
No.1/15
to
No. 1/1
No. 2/2 No2/15
Control PC
with Schniko-2
Networking
24
2VERNETZ.CHP, Stand Dezember 22, 1999
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