Configuring Process Control - Danfoss iC7 Series Application Manual

Application Guide | iC7 Series Industry
Table 18: Reference Settings
Index
5.9.3.1
5.9.3.3
5.9.3.4
5.9.3.14
Table 19: Basic I/O Settings
Index
9.5.2.1
9.5.2.2
9.5.2.3
9.5.2.4

Configuring Process Control

5.6
The built-in process controller is used to control processes based on the feedback sensor signal. Examples of controlled process variables
are flow, pressure, and temperature. The process controller is used as a reference source for the speed controller. For this reason, a pre-
condition of configuring the process control is to follow the instructions in the basic setup of a drive, configuring motor and motor
control, and configuring speed control.
The auto-tuning simplifies the configuration and saves time during commissioning, while ensuring accurate PID control adjustment. In
addition, the built-in controller supports inverse control for applications such as level control or the control of a vacuum pump. In such
applications, increasing the drive speed decreases the feedback value.
This section describes the extra configurations required to set up a basic pressure control loop according to the following illustration and
wiring diagram.
Process
Reference
Output
Figure 54: Process Controller
This configuration setup contains the following features:
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Parameter name
Torque Reference 1 Input
Torque Reference 1 Maximum
Torque Reference 1 Minimum
Torque Reference Ramp Time
Parameter name
T33 Terminal Mode
T33 Terminal Type
T33 Minimum Value
T33 Maximum Value
Process
Reference
r(t) e(t)
∑
+
-
Feedback
Sensor
Example setting
Basic I/O T33
100%
0%
10 s.
Example setting
Analog input
Voltage
0 V
10 V
P K p e(t)
+
+
u(t)
t
∑
I K i ∫e(T)dT
0
+
de(t)
D K d
dt
Feedback
Configuration Set-up Examples
Parameter
number
4534
4530
4531
2330
Parameter
number
2020
2273
2272
2271
y(t)
Plant /
Process
AB480436531518en-000601 / 136R0283