Application 6; Parameter Changes - Siemens SED2 Commissioning Manual

7.7 Application 7
Condenser tower shall be controlled with the help of the integrated PID controller including hibernation.
Switching Hand / Auto via 2 digital inputs
–
QAE22A for temperature control
–
Error message via relay output 1
–
Indication of operation via relay output 2
–
L1
L2
L3
PE
Fuses
L1 L2 L3
20
21
22
23
24
25
SED2
P(1)
9
Hz
5
I Hand Fn
6
0 Auto P
8
4
SED2
2
u v w
M
3
Notes: When the chiller interlock latches, the VSD will start and maintain the temperature setpoint (P2201). If the
output of the VSD drops below the hibernation setpoint P2390, then, after the timeout period (P2391), the
VSD will drop from the minimum motor frequency (P1080) to zero, and turn off when the temperature
exceeds the setpoint by 2 °C.
P2392: VSD will restart and ramp up to maintain the setpoint once more. This feature allows the minimum
motor frequency to be set to protect the motor from overheating and stalling, while allowing the motor to
turn off when not needed to prevent overcooling of the chiller condenser water.

7.7.1 Parameter changes

Start with quick commissioning according to application 1
Par. no. Value Parameter function
P0501(0) 29 Type of sensor
P0701(0) 16 Function of DIN 1 in "Auto" mode
P0702(0) 27 Function of DIN 2 in "Auto" mode
P0704(0) 16 Function of DIN 4 in "Auto" mode
P1000(0) 3 Selection of frequency setpoint
P1004 50 Hz Selection fixed frequency setpoint
P1080 15 Hz Motor minimum frequency
P2201 27 °C Fixed PID setpoint
Siemens
Building Technologies
Error
Relay 1
Com
Run
Relay 2
Com
Inspection switch
Fan
Commissioning Guide
7 Applications
- Hand
- Off
- Auto
Chiller
Building Management System
(BMS)
5192A07en
DIP switch setting
ON
■ ■
OFF
1 2
Function selection
Set input scale to –50...150 °C
Fixed setpoin (direct selection + ON)
PID enable
Fixed frequency (direct selection + ON)
Setpoint by fixed frequency
Fixed frequency DIN 4 = 50Hz
Minimum frequency
Fixed setpoint for PID (DIN 1)
1 = Analog input 1
OFF = DC 0...10 V
ON = 0...20 mA
2 = Analog input 2
OFF = DC 0...10 V
ON = 0...20 mA
51 / 100
CM1G5192en
29.07.2010