7/24/2019 FC102 - CONTROL PI EJEMPLO

1/2

HOW TO VLT HVAC Drive FC102

Example of Constant Pressure Pump Control

In a pumping system a constant pressure of 5 Bar is to be maintained using the integrated PID controllerin the FC102 H!C"

#ormal regulation is re$uired% i"e" the pump speed &ill reduce &hen the pressure increases beyond the

set'point and (ice'(ersa"

)he pressure transmitter used is ranged 0'10 bar and gi(es a feedbac* signal of +'20m!"

!n internal set point is to be used"

,et s&itch ,202 to -on. / Current 0'20m! nce set% Po&er unit off and bac* on again to accept ne&

s&itch settings" )hese s&itches are located underneath the 3eypad" )his then uses terminals 5+ and 55 for

the feedbac* signal"

)he follo&ing settings of parameters are re$uired4

1" !cti(ate the PID controller by setting Parameter 1"00 to -C,6D P.

2" ,et the speed limits +"12 lo& limit +"1+ high limit if &or*ing in H7" r +"11 lo& limit% +"18 high limit

if &or*ing in 9P:" !s defined in parameter 0"02

8" ,et Parameter 20"00% -Feedbac* ,ource 1. to !nalog input 5+% defining terminal 5+ to be the PID

feedbac* source

+" ,et Parameter 20"12 to the ;nits of the feedbac* transmitter scaling% in this e

7/24/2019 FC102 - CONTROL PI EJEMPLO

2/2

)he parameter displayed in the centre of the *eypad can also be selected to suit the application e"g" Bar

flo& rates etc" in parameter 0'28

#B" )he minimum re$uirement to operate the FC102 in remote control is to ha(e both terminals 1? and

2> -#. to enable the unit" )his is usually carried out by connecting 2+ olts DC from terminal 12"

!dditionally if the dri(e is fitted &ith the safe stop function then terminal 8> re$uires connecting to

terminal 12"

FC102 PID Page 2 of 2