A: PL120100.057
B: PL120100.057
E: 03.93 / T. Weiß
G: 06.93 / T. Weiß
Chapter: 5.7
Page: 2
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Structure and Function
STU 500
3) Description of individual components
3.1 Operating unit (CTD)
The operating unit provides all necessary functions for the
communication of operator and machine. All information
items are represented by symbols, i.e. are independent of
language.
The unit consists of the following areas:
a) Set value input panel for displaying and inputting individual
set values.
b) Error dialogue panel for calling-up individual error
messages.
c) Process parameter selection panel for selecting individual
set values.
The operating unit is linked to the control unit by means of a
data cable and a feeder cable.
3.2 Control unit (STU, ALS)
16-bit processor card
This is the main control system which controls, regulates,
communicates, manages and checks all other units.
Analog card
Transforms analog signals into digital ones and vice versa.
Permits the connection of five temperature probes (FeCo)
and of two analog inputs and outputs each.
Coupling card
For coupling the STU-BUS system to the ALS-BUS system.
1-bit processor card
This is the control subsystem which controls all input and
output units. An LED signals the reset of this system following
“Netz Ein” and “Netzausfall” (power outage).
AIO 172
KOP 500
CC 11
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