Siemens G120P

4
Application examples
Cooling tower fan (LG-Ni1000) + hibernation
40
Siemens AG CM2G5111en
2014-05-16
Cooling tower fan (LG-Ni1000) + hibernation
 Macro 107 "Cooling tower LG-Ni1000 sensor +
hibernation"
 Control of the cooling tower fan based on the
temperature of the cooling water
 LG-Ni1000 temperature sensor on AI3
 Hibernation
 Flying restart and automatic restart activated
 Error message: Digital output 0
 Status display: Digital output 2
When selecting this application using macro 107, the
technological unit remains unchanged at [%]. If
necessary, adapt the unit as described in the parameter
list. Select the values depending on the used sensor.
9
5
14
15
GND
AI3+
PTC A
PTC B
DI0
53
52
P24V
25
24
23
22
21
20
19
18
AO0+
AO0-
AO1+
AO1-
Optional
DO0
DO1
DO2
Temparature
sensor Ni1000,
e.g. QAP22
28
69
GND
DI COM
12
13
26
27
ON / OFF
Fault
Alarm
Operation
Speed
(0..20mA)
Output current
(0..20mA)
Parameter Value Description
p596 100 Reference variable of the technological unit
p0010 5 Parameter filter change, technological unit
p595 4 Selection of technological unit: °C
p0010 0 Parameter filter ready
p756[3] 6 LG-Ni1000 temperature sensor
p0840 r722.0 ON / OFF (OFF1)
p1200[0] 1 Flying restart always active (start in setpoint direction)
p1210 26 Acknowledging all faults and restarting for an ON command
p2200[0] 1 Technology controller enable
p2201[0] 26 °C Technology controller fixed value 1
p2253[0] p2201 Technology controller setpoint 1
p2257 30 s Technology controller setpoint ramp-up time
p2258 30 s Technology controller setpoint ramp-down time
p2264[0] r755[3] Technology controller actual value
p2265 10 s Technology controller actual value filter time constant
p2267 100 °C Technology controller upper limit actual value
p2268 -10 °C Technology controller lower limit actual value
p2293 30 s Technology controller ramp-up/ramp-down time
p2306 1 Technology controller fault-signal inversion
p2390[0] 50 rpm Hibernation start speed
p2391[0] 60 s Hibernation delay time
p2392 1 °C Hibernation restart value with technology controller
p2398 1 Hibernation mode
4.4