Parker ac890 - Page 489

Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D Page D-139
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A
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Parameter Descriptions
TRIP SELECTION
PREF: 133.21 Default: 2 Range: See below
Select the trip detection based on hardware and/or software detection:
Enumerated Value : Trip Selection
0 : HARD AND SOFT The trip is based on hardware and software detection.
1 : HARD The trip is only based on hardware detection.
2 : SOFT The trip is only based on software detection.
Hardware Detection :
The trip is issued from the sine and cosine inputs, based on the following nominal values for the resolver :
CARRIER VOLTAGE : 7Vrms
RATIO : 0.5
Software Detection :
The trip is also issued from the sine and cosine inputs. The trigger value used is based on the following formula :
trip level = 0.15 *( CARRIER VOLTAGE * 0.1414 * RATIO * 2.0 )
where
CARRIER VOLTAGE = 7Vrms, RATIO = 0.5 for a standard resolver
0.15 is the trigger value.