Programming
Page
D-38
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
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ENCODER
SETUP::MOTOR CONTROL::ENCODER
This block is used to set up the way that speed feedback is obtained via the feedback option card. Different encoder types may
be selected including pulse encoder, sincos encoder and absolute single turn or multi turn. Different encoder types require
different hardware options. If an encoder type is selected which does not match the hardware, an error will be flagged.
Parameter Descriptions
PULSE ENC VOLTS
PREF: 71.01
Default: 10.0 V
Range: 10.0 to 20.0 V
Set this approximately to the supply voltage required by the pulse encoder.
SINCOS ENC VOLTS
PREF: 71.22
Default: 5.0 V
Range: See below
Used to set the supply volts required by the sin/cos encoder.
Enumerated Value
: SinCos Encoder Volts
0 : 5V
1 : 10V
ENCODER LINES
PREF: 71.02
Default: 2048
Range: 250 to 262143
The number of lines must be set to match the type of encoder being used. Incorrect setting of this parameter will result in an
erroneous speed measurement and will cause the motor to become unstable.
ENCODER INVERT
PREF: 71.03
Default: FALSE
Range: FALSE/TRUE
Used to match the encoder direction to the motor direction. The encoder direction is set automatically by the Autotune when
running in closed-loop vector mode. It should not be necessary to adjust this parameter. When TRUE, changes the sign of the
measured speed and the direction of the position count.
