CLINK II SCU MANAGER
functional description scu
version 5.0
30
5.5.1
Control levels
Figure 6: Control levels within a typical configuration
Within the Clink-system three control levels and ways of control are distinguished, see figure 6:
1
Process control level: controlled via DeviceNet
2
Switchgear level:
controlled via Digital inputs
3
Field level:
controlled via hard wired circuits
DeviceNet
At the highest level, motor control takes place by means of a Distributed Control System (DCS), a
Programmable Logic Controller (PLC) or a Supervisory Control And Data Acquisition system (SCADA). In this
manual all controlling systems are indicated as process controller. From a process controller it is possible to
switch motors on and off.
Via LCU-5 it is possible to configure the starter logic operation (see 5.6 on page 32) and the automatic restart
function (see 5.7 on page 40). In order to configure the automatic restart function select:
SCU Manager - Motor
Control - Settings - tab Restart
.
Digital inputs
At the second level, motor control takes place by means of:
•
Operation buttons on the motor starter tray. With these buttons start1, start2 and stop commands can be
given which are processed by the Starter Control Unit.
•
Digital inputs, for the use of digital inputs see 5.3.1 on page 25.
LCU
Field level
RCU
Process control level
Switchgear
level
Monitoring, maintenance &
engineering
M
feeder/
incomer
DCS
SCADA
EWS
DeviceNet
CIU 1
CIU 2
S
C
U
S
C
U
S
C
U
F
C
U
F
C
U
F
C
U