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D-37

Programming

890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D

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.

Parker ac890 User Manual

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