286 Parameters2828 Frequency referencechainSettings for the frequency reference chain.See the control chain diagrams on pages 656 and 657.28.01 Frequency ref rampinputDisplays the used frequency reference before ramping. Seethe control chain diagram on page 657.This parameter is read-only.--500.00 …500.00 HzFrequency reference before ramping. See par.46.0228.02 Frequency ref rampoutputDisplays the final frequency reference (after selection,limitation and ramping). See the control chain diagram onpage 657.This parameter is read-only.--500.00 …500.00 HzFinal frequency reference. See par.46.0228.11 Frequency ref1sourceSelects frequency reference source 1.Two signal sources can be defined by this parameter and28.12 Frequency ref2 source. A digital source selected by28.14 Frequency ref1/2 selection can be used to switchbetween the two sources, or a mathematical function (28.13Frequency ref1 function) applied to the two signals to createthe reference.ZeroZero None. 0AI1 scaled 12.12 AI1 scaled value (see page 197). 1AI2 scaled 12.22 AI2 scaled value (see page 198). 2FB A ref1 03.05 FB A reference 1 (see page 160). 4FB A ref2 03.06 FB A reference 2 (see page 160). 5EFB ref1 03.09 EFB reference 1 (see page 160). 8EFB ref2 03.10 EFB reference 2 (see page 160). 9DDCS ctrl ref1 03.11 DDCS controller ref 1 (see page 160). 10DDCS ctrl ref2 03.12 DDCS controller ref 2 (see page 160). 11M/F reference 1 03.13 M/F or D2D ref1 (see page 160). 12M/F reference 2 03.14 M/F or D2D ref2 (see page 161). 13Motor potentiometer 22.80 Motor potentiometer ref act (output of the motorpotentiometer).15No. Name/Value Description Def/FbEq1628.141028.13MULSUBADDMINMAX28.1128.1228.9228.9028.910AIFB…Other…0AIFB…Other…Ref1