ECO REFERENCE MANUAL
11-11
EG
EXAMPLE 10
SELECT BETWEEN POTENTIOMETER CONTROL AND PID REGULATION
In a ventilation system, the duct pressure differential is to be adjustable by means of a
potentiometer. Output signals from the pressure transducer are supplied to the Eco, the
selected pressure differential must be kept constant , and the internal PID regulator is used to
achieve this. Alternatively, selection can be made at the motor control panel for closed loop PID
regulation.
All settings based on factory settings with the following exceptions :
PARAMETER CHANGES FROM FACTORY DEFAULTS
SETTING
DESCRIPTION
P006 = 1
SELECT ANALOG SETPOINT
P007 = 0
SELECT RUN/STOP VIA TERMINALS
P012 = 10
MINIMUM SPEED = 10Hz
P053 = 22
DOWNLOAD OPe PARAMETER SET 0
P054 = 23
DOWNLOAD OPe PARAMETER SET 1
P201 = 1
PID ENABLED (SEE ABOVE OPe SETTINGS)
P202 = 1
PID PROPORTIONAL GAIN (MAY NEED TUNING)
P203 = 0.1 P205 = 10
PID INTEGRAL GAIN (MAY NEED TUNING)
P220 = 1
SWITCH OFF AT MINIMUM SPEED
P211 = 20 P212 = 100
SET ANALOG (PID) INPUT FOR 4 - 20 mA
L1
20
9
5
1
3
4
2
11
10
L2
L3
V
U
W
FUSES
P
mA
POWER SUPPLY
15V DC TRANSDUCER
M
A
B
D
MICROMASTER Eco
MIDIMASTER Eco
MOTOR CONTROL PANEL
FAULT CONTACT
CLOSED = HEALTHY
19
MAIN CONTACTOR
7
8
OPe
CLEAR
TEXT
DISPLAY
FITTED
(OPTION)
C
0 TO 10 BAR
E
(MCC)
4 TO 20mA
L1
L2
L3
N
PE
DIP SWITCHES
ITEM
DESCRIPTION
A
RUN/STOP COMMAND FROM MCC PANEL
B
SETPOINT POTENTIOMETER
C
DIFFERENTIAL PRESSURE TRANSDUCER
D
SELECT LOCAL POTENTIOMETER PUSHBUTTON
E
SELECT PID CONTROL PUSHBUTTON
