User Manual For - CONTROLLER/DATA RECORDER MultiCon CMC-99/141
7.13.2.
Examples of Controller configuration
s
7.13.2.1.
A
pplication of the Controllers
See also:
Chapter 7.13. CONTROLLERS
Task:
The task is to configure the controller which will control (via RS-485) the heater in order
to obtain a constant object temperature. A logical channels with set point value and
temperature from PT100 sensor are connected to the controller. After pre analize the sensor
type and the transmittance of the object, we set the controller coefficients on values: P=0.3,
I=0.5, D=0.02. We do not want that the controller respond for deviation lower than 2ºC. On
controller's output set 0-20mA range, because that is the range of the converter we use to
control the heater in this task.
Solution:
First configure the controller, then connect the Pt100 sensor and Current converter to
the device. Example of this connections are shown on
Fig. 7.111. The connection scheme for RT4 module and Modbus MB1 port
In the first step we define
Controller
settings:
–
touch screen and press
Menu
button,
–
press the
Device configuration
button,
–
enter the
Controllers
menu,
–
using the arrows tin the top navigation bar, select any
Controller
such as
1
,
–
in
Controller name
parameter write
Controller 1
,
–
Mode
parameter set as
PID
,
–
in
Dead zone
parameter write
2
,
–
for
Controller parameters
parameter block:
•
in
P coefficient
parameter write
0.3
,
•
in
I coefficient
parameter write
0.5
,
•
in
D coefficient
parameter write
0.02
,
•
Differentiated signal
parameter set as
error (deviation)
,
189
Power supply
(depending on version)
1
2
8
5
6
7
3
4
+24V DC ±5%
(
I
max. = 200mA)
digital input
0/15..24V DC
RS-485
GND
GND
A+
B-
isolated
Pt100
sensor
Slot B
RT4
4 RTD inputs
Current
converter
Slave device
Slave address: 1
Register: 1h
Heater
Control system
0÷5A
RS-485
I
N
1
I
N
2
I
N
3
I
N
4
n01
n02
n03
n04
n05
n06
n07
n08
n09
n10
n12
n13
n14
n15
n16
n11
GND
Inp.B1 : RTD
Inp.B2 : RTD
Inp.B3 : RTD
Inp.B4 : RTD
SERVICE
