Programming
Page
D-162
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
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SPEED LOOP 2
SETUP::MOTOR CONTROL::SPEED LOOP 2
Designed for SENSORLESS VEC and CLOSED-LOOP VEC Motor Control Modes.
There are three filters operating on the speed loop torque demand output. They add compensation to the transfer function of the
motor and load. This can improve performance. Use the tuning tool in the DSE 890 Configuration Tool to set these filters
optimally.
Setting the Filter Type to NONE will cause the filter to have no effect. If compensation is required, up to three filters may be
selected in any order and in any combination.
One of the filters is located in the SPEED LOOP function block, the other two filters are located in the SPEED LOOP 2
function block (this block).
♦ The SPEED LOOP function block contains one filter: this is selected by COMPENSATION F1 and COMPENSAT'N
TYPE (a second parameter COMPENSATION F2 is also used when the compensation type is selected to be PHASE
ADVANCE).
♦ The SPEED LOOP 2 function block (this block) contains two filters: these are selected by TQ COMP 2 FREQ and
SELECT TQ COMP 2, and also TQ COMP 3 FREQ and SELECT TQ COMP 3.
Parameter Descriptions
SELECT TQ COMP 2
PREF: 163.1 Default: NONE Range: See below
Selects the type of compensation applied to the torque demand. Refer to Functional Description in the SPEED LOOP
function block for selection details. (PHASE ADVANCE is not selectable with this filter)
Enumerated Value : Filter Type
0 : NONE
1 : MAX ATTENUATION
2 : MINIMUM PHASE
3 : NOTCH FILTER
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