Control Techniques COMMANDER SE, Руководство для продвинутых пользователей

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Commander SE Advanced User Guide
23
Issue Number: 4
These parameters are made available for control by analog inputs which are required to be frequency references.
The programmed input is automatically scaled such that 100.0% input corresponds to the set maximum speed (
1.06 or
21.01 ). Also the 0% input level corresponds to the minimum speed level ( 1.07 or 21.02 ) if Allow negative digital references
( 1.10 ) is not selected.
Although the drive’s analog inputs ( 7.01 , 7.02 ) cannot provide negative speed references, if the analog input destination
parameters ( 7.10 , 7.14 ) are directed away from the analog reference parameters ( 1.36 , 1.37 ), then negative values can be
written to them over the serial interface.
These bits are provided for control by logic input terminals for external reference selection (see parameters 1.14 , 21.03 and
1.15 ).
Although parameters 1.41 to 1.47 are Read only parameters, they can be written to but only via a digital input.
1.36 Analog reference 1
1.37 Analog reference 2
Ú
±par 1.06 or ±par 21.01
Ö
Hz RO Bi
1.38 ~
1.40
Unused parameters
1.41 Analog reference 2 select
1.42 Preset reference select
1.43 Keypad reference select
1.44 Precision reference select
1.45 Preset select bit 0
1.46 Preset select bit 1
1.47 Preset select bit 2
Ú
0 or 1
Ö
RO Bit
Allow negative digital
reference operation
(01.10 = 1)
Frequency
1.06
100.0
Input (%)
0
NOTE