Siemens SED2 Commissioning Guide

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Siemens Commissioning Guide CM1G5192en
Building Technologies 7 Applications 29.07.2010
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
Hand
Auto
SED2
0
I
P
Fn
P(1)
Hz
L1
L2
L3
PE
L1 L2 L3
20
9
5
4
2
SED2
uvw
M
3
21
22
23
24
25
6
8
Fuses
Building Management System
(BMS)
Inspection switch
Fan
5192A07en
Error
Com
Run
Com
Relay 1
Relay 2
- Auto
- Hand
- Off
Chiller
Immersion temp. sensor QAE22A
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 Function selection
P0501(0) 29 Type of sensor Set input scale to –50…150 °C
P0701(0) 16 Function of DIN 1 in “Auto” mode Fixed setpoin (direct selection + ON)
P0702(0) 27 Function of DIN 2 in “Auto” mode PID enable
P0704(0) 16 Function of DIN 4 in “Auto” mode Fixed frequency (direct selection + ON)
P1000(0) 3 Selection of frequency setpoint Setpoint by fixed frequency
P1004 50 Hz Selection fixed frequency setpoint Fixed frequency DIN 4 = 50Hz
P1080 15 Hz Motor minimum frequency Minimum frequency
P2201 27 °C Fixed PID setpoint Fixed setpoint for PID (DIN 1)
DIP switch setting
ON
1 = Analog input 1
OFF
■ ■
OFF = DC 0…10 V
1 2 ON = 0…20 mA
2 = Analog input 2
OFF = DC 0…10 V
ON = 0…20 mA

Siemens SED2 Specifications

General

Input Voltage	380-480V AC
Current Rating	Depends on model
Control Type	Digital
Communication	PROFIBUS, PROFINET, Ethernet
Communication Interface	RS485
Protection Features	Overcurrent, overvoltage, undervoltage, overtemperature, short circuit
Operating Temperature	0 to +45 °C
Storage Temperature	+70 °C