Application Example 3; Parameter Changes - Siemens sed2 Commissioning Manual

7.3 Application example 3

Temperature control: Cooling
When the demand for cooling increases, the fan will increase its speed
−
Switching on / off via digital input 1 (thermostat), on temperature rise ON
−
External alarm to digital input 2 (e.g. fire alarm); fan stops in the event of an alarm
−
Error message via relay output 1
−
Indication of operation via relay output 2
−
L1
L2
L3
PE
L1 L2
P(1)
Hz
I Hand
0 Auto
SED2
u
M
3

7.3.1 Parameter changes

Start with quick commissioning according to application example 1
Par. no. Value Parameter function
P0003 3 User access level
P0702(0) 29 Function of digital input 2 in "Auto" mode
P0702(1) 29 Function digital input 2 in "Hand" mode
P701(0) 16 Function of digital input 1
P2201 22 °C Room temperature setpoint
P2253(0) 2224 Setpoint source for PID setpoint
P501(1) 29 Selection of temperature sensor
P2264(0) 755.1 PID feedback
P2306 0 Selection of cooling / heating sequence
P2200(0) 1 Enable PID controller
P2280 10 PID proportional gain
P2285 30 PID integral action time
r2262 Current setpoint
r2272 Current feedback
32/80
Siemens Building Technologies
HVAC Products
Fuses
L3
Error
20
21
Com
22
23
Run
24
Com
25
SED2
5
6
9
Fn
P 11
2
v w
Inspection switch
Fan
Commissioning Guide
7 Application examples
Relay 1
Relay 2
Building Management System
DIP switch setting
ON
OFF
Function selection
Expert function
External alarm
External alarm
ON, fixed setpoint (thermostat)
Adjust required setpoint
Fixed PID setpoint
LG-Ni 1000: -50...150 °C
Analog input 2
Cooling
PID controller enabled
- Switch on/off
- External alarm
(BMS)
5192A03en
1 = analog input 1
❚ ❚
OFF = DC 0...10 V
1 2 ON = 0...20 mA
2 = analog input 2
OFF = DC 0...10 V
ON = 0...20 mA
CM1G5192en
26.02.2003