ECO REFERENCE MANUAL
11-9
EG
EXAMPLE 9
PID CONTROL - PRESSURE SETPOINT
In a ventilation system, the duct pressure differential is to be adjustable by means of a 0 - 10V
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.
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
P201 = 1 PID ENABLED
P202 = 1 PID PROPORTIONAL GAIN (MAY NEED TUNING)
P203 = 0 P205 = 10 PID INTEGRAL GAIN (MAY NEED TUNING)
P220 = 1 SWITCH OFF AT MINIMUM SPEED
P211 = 20 P212 = 100 SELECT ANALOG (PID) INPUT FOR 4 - 20mA
L1
20
9
5
1
3
4
2
9
2
11
10
L2 L3
VUW
FUSES
P
mA
0 TO 10 BAR
M
A
B
C
MICROMASTER Eco
MIDIMASTER Eco
FAULT CONTACT
CLOSED = HEALTHY
19
MAIN CONTACTOR
15V DC TRANSDUCER
POWER SUPPLY
(MAX 50mA)
4 to 20mA
MOTOR CONTROL PANEL (MCC) OR
BUILDING MANAGEMENT SYSTEM (BMS)
DIP SWITCHES
L1
L2
L3
N
PE
ITEM DESCRIPTION
A RUN/STOP COMMAND
B PRESSURE SETPOINT POTENTIOMETER OR 0 - 10V DC
SIGNAL
C DIFFERENTIAL PRESSURE TRANSDUCER
Note: Link terminals 2 and 10 if a 2 wire transducer is used.
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