Telemecanique Altivar 56 manual - Northern Industrial

Bulletin No. 50006-519-01BChapter 5 — ConfigurationDecember 1996 7 → General Configuration MenuTable 29: Logic Input States for 3 Preset SpeedsInput a Input bLow Speed or Reference 0 0Preset Speed 1 1 0Preset Speed 2 0 1Preset Speed 3 1 1Seven preset speeds can be obtained with the I/O Extension Module. For moreinformation refer to the catalog (document number VD0C06S201_).Speed ReferenceSPEED REFERENCESPEED REF. 1.: AI1SPEED REF. 2 : AI2CLAMP SUM : YES†, & ENT to modifyENTESCAI2 SIGNAL TYPE0-20 mA4-20 mA20-4 mAX-20 mA,X= mAMULTIPLY BY (-1): NOENTNOYESSpeed Reference allows the assignment of the AI1 and AI2 inputs as SpeedReference 1 or Speed Reference 2. Speed Reference also allows you to modify theanalog current input, AI2, for type of signal. The adjustment range is 0-20 mA,4-20 mA, 20-4 mA, or x-20 mA where x can be programmed from 0 to 20 mA inincrements of 0.1 mA. Factory setting for AI2 is 4-20 mA. When Speed Reference isset to x-20 mA, the frequency at which the drive controller will run is determinedas follows:f = ( High Speed – Low Speed) ( Input mA § 20 mA) + Low SpeedWhen the value of AI2 is below x mA, the drive will run at the Low Speed setting.HSPfLSPXmA20mAFigure 48: Speed Reference and Drive Controller FrequencyIf the switch on the control board is set to voltage, AI2 will be a 0-5 V voltage input.Refer to Chapter 2 for location of switch. AI2 in this case must be set on the keypaddisplay for 0-20 mA. The voltage reference input, AI1, cannot be modified. It isfixed as a 0 to 10 VDC input.The two inputs, AI1 and AI2, are summed as a factory default, limited to HighSpeed. However, when Auto/Manual is active the inputs function independentlyand only one is active at a time. It is possible to multiply AI2 by (-1) by selectingYes. In this case, AI2 is subtracted from AI1. If Clamp Sum is set to Yes (factorysetting) and (AI1-AI2) is zero or negative, the drive controller will run at LowSpeed. If Clamp Sum is set to No and (AI1-AI2) is negative, the drive controller willchange direction. See Notes on page 80.© 1996 Square D All Rights Reserved79ηττπ://νιχοντρολσ.χοm