Parker ac890 - Page 389

Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D Page D-39
8
9
10
A
B
C
D
E
1
2
3
4
5
6
7
Parameter Descriptions
ENCODER TYPE
PREF: 71.04 Default: 3 Range: See below
This parameter defines the type of encoder being used.
Enumerated Value : Type
0 : QUADRATURE single-ended pulse encoder
1 : CLOCK/DIR single-ended pulse encoder
2 : CLOCK single-ended pulse encoder
3 : QUADRATURE DIFF differential pulse encoder
4 : CLOCK/DIR DIFF differential pulse encoder
5 : CLOCK DIFF differential pulse encoder
6 : SINCOS INC sin/cos encoder
7 : ABS ENDAT ST single turn endat absolute encoder
8 : ABS ENDAT MT multi-turn endat absolute encoder
Note that if an absolute endat encoder is used, the encoder MUST be wired exactly as specified. If not, it will fail to calibrate
the absolute position and an error will result when the drive is started. Its status can be viewed via the parameter CALIBRATN
STATUS.
ENCODER MECH O/S
PREF: 71.06 Default: 0.0000 deg Range: 0.0000 to
360.0000 deg
(Encoder mechanical offset). When using an absolute encoder, the SHAFT POSITION diagnostic shows the absolute position
of the motor shaft. The zero position can be adjusted by setting ENCODER MECH O/S. Rotate the motor shaft to the position
which is required to be zero, and note the value of SHAFT POSITION. Enter this value into ENCODER MECH O/S to zero
its position.
ENCODER FBK %
PREF: 71.08 Default: —.xx % Range: —.xx %
This parameter shows the mechanical speed of the motor shaft, calculated from the encoder feedback, as a percentage of the
user maximum speed setting (MAX SPEED in the REFERENCE function block).