Application Example - Siemens SIMOCODE pro System Manual

1.3

Application example

Description
The fill level of a liquid container is being monitored. A pump keeps the
liquid level (reference value) almost constant by pumping more liquid into
the container. The fill level (actual value) is measured by the fill level
indicator and output as an analog signal. When the fill level sinks below a
specific level, the pump is switched on by SIMOCODE pro. Liquid is
pumped in until the reference value is re-attained. The pump is then
switched off.
Controlling the pump
The pump can be controlled as follows:
• Locally: Local control station [LC] for manual switching on and off (by visual
contact)
• LC in the switchgear cabinet door: Control station operator panel [OP] for
switching on and off manually
• At automation level: Control station PLC/PCS [DP] for remote-controlled
switching on and off (automatic operation) via PROFIBUS DP
• Via SIMOCODE pro: Via local mode fill-level monitoring and/or limit value
monitoring.
Schematic
3/N/PE ~ 50/60 Hz 400/230 V
L1
L2
L3
N
PE
1 3 5
Q1
2 4 6
Current measuring
module (IM)
System
interface
1 3 5
- Q1
2 4 6
Pump
PE
U V W
T1
Thermistor
M
ϑ
3~
T2
Fig. 1-5: Schematic of a typical application example
SIMOCODE pro
GWA 4NEB 631 6050-22 DS 03
L1/L+
Control station
F11
Local control station [LC]
S0 S1
A2 A1 IN1 IN2
Basic unit (BU 2)
Connecting cable
T1 T2
OUT 1
Q1
N/L–
System description
Control station
PLC/PCS
PLC/PCS [DP]
PROFIBUS DP
Fill-level indicator
Liquid container
In+
In–
24 V
Analog module (AM)
Out+
1 Out–
Optional:
Laptop with
SIMOCODE ES
L+
L–
Control station
Operator panel
Display
Motor current
(Unit: % of I )
s
1-11