Examples - Siemens SINAMICS S120 Function Manual

4.1.4

Examples

Dancer control
The objective here is to maintain a constant level in the container.
This is carried out by means of a variable-speed pump in conjunction with a sensor
for measuring the level.
The level is determined via an analog input (e.g. AI0 on TB30) and sent to the
technology controller. The level setpoint is defined in a fixed setpoint. The resulting
controlled variable is used as the setpoint for the speed controller.
In this example, terminal board 30 (TB30) is used.
Fig. 4-1
Ramp-function
X
generator
setp
Tec _reg
setpoint
p2253
X
act
Actual
value
p2264
Fig. 4-2 Liquid level control: controller structure
© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition
Liquid level control: application
Tec _ reg type
+
+
p2263
1
– 1
0
Extended Functions
"Technology controller" function module
Sensor
X
act
Tec_ctrl Kp Tec_ctrl Tn
p2280
p2285
+
+
d
dt
n_setp1
p 1155
4-181