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Application manual for EC-Control
Table of contents
1
Safety instructions...................................................................................................3
2
Basis and term definitions for EC-Control ............................................................. 4
2.1
2.2
2.3
Open loop control............................................................................................................................. 8
Closed loop control .......................................................................................................................... 8
P and I factor.................................................................................................................................... 9
2.3.1 Proportional control system .............................................................................................................................................10
2.3.2 PI-control 11
2.4
2.5
2.6
EC-Control control modes ...............................................................................................................13
Control function of a closed loop (only for control mode “sensor control”) ......................................13
Limit values of the speed and the PWM signal ...............................................................................15
3
Setting options and basic functions via MODBUS .............................................. 17
3.1
Networking and assigning addresses to MODBUS nodes ..............................................................17
3.1.1 Automatic address assignment .......................................................................................................................................21
3.2
3.3
Soft On/Off and Motor stop enable .................................................................................................22
Changing the parameter set............................................................................................................23
3.3.1 Configuring separate set values for day/night operation .................................................................................................24
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.10.1
3.10.2
3.10.3
3.10.4
3.10.5
3.11
4
Fail safe function .............................................................................................................................24
Winter functions ..............................................................................................................................26
Motor settings (alarm relay) ............................................................................................................27
Specification of actual value by sensor via the inputs Ain2 U and Ain2 I ........................................28
Specification of actual value by two sensors ...................................................................................29
Set value input via the inputs Ain1 U and Ain1 I or via EC-Control .................................................30
Curves ............................................................................................................................................31
Input curve .......................................................................................................................................................................31
Inverse curve ...................................................................................................................................................................33
Output curve ....................................................................................................................................................................34
Analogue output : Impulses per revolution ......................................................................................................................35
Motor derating .................................................................................................................................................................35
Run monitoring................................................................................................................................37
Use of EC-Control in customer applications ....................................................... 38
4.1
Refrigeration plantn .........................................................................................................................38
4.1.1 Master-slave Configuration (star-shaped) .......................................................................................................................38
4.1.2 Master-slave Configuration with cascade operation ........................................................................................................43
4.1.3 Reverse operation for cleaning and de-icing the exchanger ...........................................................................................45
4.2
Configuration notes for air flow control in air-conditioning unitsn ....................................................48
4.2.1 Digital setting of values for air flow control, such as day/night switchover ......................................................................50
4.2.2 Analogue setpoint input during air flow control ................................................................................................................52
4.3
Temperature control – any control characteristic with temperature sensor .....................................53
Keyword index .................................................................................................................. 58
1