Siemens Midimaster Eco Reference Manual page 76

ECO REFERENCE MANUAL
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.
The OPe clear text display is required to be fitted and remain fitted for this application.
All settings based on factory settings with the following exceptions:
PARAMETER CHANGES FROM FACTORY DEFAULTS
SETTING
P006 = 1
P007 = 0
P012 = 10
P053 = 22
P054 = 23
P201 = 1
P202 = 1
P203 = 0.1 P205 = 10
P220 = 1
P211 = 20 P212 = 100
L1
L2
L3
N
PE
L1
OPe
CLEAR
TEXT
DISPLAY
FITTED
(OPTION)
MICROMASTER Eco
MIDIMASTER Eco
U
ITEM
A
B
C
D
E
SELECT ANALOG SETPOINT
SELECT RUN/STOP VIA TERMINALS
MINIMUM SPEED = 10Hz
DOWNLOAD OPe PARAMETER SET 0
DOWNLOAD OPe PARAMETER SET 1
PID ENABLED (SEE ABOVE OPe SETTINGS)
PID PROPORTIONAL GAIN (MAY NEED TUNING)
PID INTEGRAL GAIN (MAY NEED TUNING)
SWITCH OFF AT MINIMUM SPEED
SET ANALOG (PID) INPUT FOR 4 - 20 mA
FUSES
MAIN CONTACTOR
19
L2 L3
20
9
5
1
3
4
2
7
8
10
4 TO 20mA
V W
11
0 TO 10 BAR
M
RUN/STOP COMMAND FROM MCC PANEL
SETPOINT POTENTIOMETER
DIFFERENTIAL PRESSURE TRANSDUCER
SELECT LOCAL POTENTIOMETER PUSHBUTTON
SELECT PID CONTROL PUSHBUTTON
DESCRIPTION
FAULT CONTACT
CLOSED = HEALTHY
MOTOR CONTROL PANEL
(MCC)
15V DC TRANSDUCER
POWER SUPPLY
C
mA
P
DESCRIPTION
A
B
D
E
DIP SWITCHES
11-11
EG