Parker ac890 - Page 544

Programming D-148
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
Parameter Descriptions
OUTPUT
PREF: 91.10
Default: —.xx %
Range: —.xx %
Diagnostic on the output of the function block in %
OUTPUT HZ
PREF: 91.11
Default: —.x Hz
Range: —.x Hz
Diagnostic on the output of the function block in Hz
INPUT HZ
PREF: 91.12
Default: —.x Hz
Range: —.x Hz
Diagnostic on the input of the function block in Hz
Functional Description
Four programmable skip frequencies are available to avoid resonances within the mechanical system. Enter the value of
frequency that causes the resonance using the “FREQUENCY” parameter and then programme the width of the skip band
using its “BAND” parameter. The Drive will then avoid sustained operation within the forbidden band as shown in the
diagram. The skip frequencies are symmetrical and thus work in forward and reverse.
Note Setting the FREQUENCY to 0 disables the corresponding band. Setting the BAND to 0 causes the value of BAND 1
to be used for this band.