Manual
Double Sheet Control System R1000 series L20
with integrated fieldbus interface
B0063191 / 1.3
System description
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
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3.2.1 Versions of the control unit L20
The control unit article key is coded as follows:
Control unit L20 with fieldbus interface
all sensors are directly connected at the control unit by pluggable contacts.
L20- XX-S
L20-3-XX-S
A
Type of unit
L20
B
Measuring channels
„ „*
3
1 channel unit
1 channels unit
C
Fieldbus code
XX Bus code
D
Connection
S
Cables pluggable
XX
Bus code
PR
Profibus-DP
DNT
DeviceNet (A-coded)
PN
ProfiNet IO
CP
CanOpen
CC
CC-Link
EN
EtherNet/IP
ET
EtherCAT
A
B C D
* 1 is omitted in article key for the 1-channel control unit
The article key above leads to following version of the control unit:
L20-X-S:
Data backup via
fieldbus or serial
USB interface
Control unit for connecting 1 pair of sensors in wall mounting, fieldbus interface
L20-3-XX-S
Control unit for connecting up to 3 pairs of sensors in wall mounting, fieldbus
interface
3.2.2 Parameters of the control unit
The L20 provides for extensive configuration. So, different customer requirements can be served.
Configuration is performed by setting system parameters, adjust parameters and program
parameters. System parameters are set only once during commissioning, and will then remain
unchanged. Program parameters contain items which are material and job depending, and enable
individual adaptation to the measuring task. The adjustment parameters contain the adjustment of
the measuring point.
The parameters are explained in depth in the chapter 7.3 „Operation“.
Pay special attention to the program parameters
„low“,
„up“
and
„moving average above xx ms“
The switching thresholds of the status signals depend on the settings of „low“ and „up“.
The measuring signal is fed to a window comparator. The signal “0-sheet“ is generated when the
measuring signal falls below the lower switching threshold “ low”. The lower switching threshold
“low” can be set from 1...100%. The signal “2-sheet“ is generated when the upper switching
threshold is exceeded. The upper switching threshold “up” can be set from 100...180%. If the
measuring value is within both limits, the signal “1-sheet“ is generated.
a
b
c
up
low
Signal range for 0-sheet
Signal range for 1-sheet
Signal range for 2-sheet
Upper switching threshold
Lower switching threshold
Fig. 6: Visualization of switching thresholds
2
1
0
Signal
Obere Schaltschwelle
Upper switching threshold
Untere Schaltschwelle
Lower switching threshold
a
b
c
