Siemens Midimaster Eco Reference Manual page 74

ECO REFERENCE MANUAL
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
P006 = 1
P007 = 0
P012 = 10
P201 = 1
P202 = 1
P203 = 0 P205 = 10
P220 = 1
P211 = 20 P212 = 100
L1
L2
L3
N
PE
ITEM
A
B
C
SELECT ANALOG SETPOINT
SELECT RUN/STOP VIA TERMINALS
MINIMUM SPEED = 10Hz
PID ENABLED
PID PROPORTIONAL GAIN (MAY NEED TUNING)
PID INTEGRAL GAIN (MAY NEED TUNING)
SWITCH OFF AT MINIMUM SPEED
SELECT ANALOG (PID) INPUT FOR 4 - 20mA
FUSES
MAIN CONTACTOR
L1 L2 L3
19
20
9
5
1
3
4
2
9
MICROMASTER Eco
2
MIDIMASTER Eco
10
4 to 20mA
U V W 11
M
RUN/STOP COMMAND
PRESSURE SETPOINT POTENTIOMETER OR 0 - 10V DC
SIGNAL
DIFFERENTIAL PRESSURE TRANSDUCER
Note: Link terminals 2 and 10 if a 2 wire transducer is used.
DESCRIPTION
DIP SWITCHES
MOTOR CONTROL PANEL (MCC) OR
BUILDING MANAGEMENT SYSTEM (BMS)
FAULT CONTACT
CLOSED = HEALTHY
15V DC TRANSDUCER
POWER SUPPLY
(MAX 50mA)
mA C
P
0 TO 10 BAR
DESCRIPTION
A
B
11-9
EG