ACS550-02/U2 User’s Manual 201
Parameters
Group 50: ENCODER
This group defines the setup for encoder use:
• Sets the number of encoder pulses per shaft revolution.
• Enables the encoder operation.
• Defines how mechanical angle and revolution data is reset.
See also User’s Manual for Pulse Encoder Interface Module OTAC-01
[3AUA0000001938 (English)].
Code Description
5001 PULSE NR
Sets the number of pulses provided by an optional encoder for each full motor shaft revolution (ppr).
5002 ENCODER ENABLE
Enables/disables an optional encoder.
0 =
DISABLE – Drive uses speed feedback derived from the internal motor model (applies for any setting of parameter
9904
MOTOR CTRL MODE).
1 =
ENABLE – Drive uses feedback from an optional encoder. This function requires the Pulse Encoder Interface
Module (OTAC-01) and an encoder. Operation depends on the setting of parameter 9904 MOTOR CTRL MODE:
• 9904 = 1 (
VECTOR:SPEED): The encoder provides improved speed feedback and improved low speed torque
accuracy.
• 9904 = 2 (
VECTOR:TORQ): The encoder provides improved speed feedback and improved low speed torque
accuracy.
• 9904 = 3 (
SCALAR:SPEED): The encoder provides speed feedback. (This is not closed loop speed regulation.
However, using parameter 2608 SLIP COMP RATIO and an encoder improves steady state speed accuracy.)
5003 ENCODER FAULT
Defines the drive operation if a failure is detected in communication between the encoder and the encoder interface
module, or between the module and the drive.
1 =
FAULT – The drive generates fault ENCODER ERR, and the motor coasts to a stop.
2 =
ALARM – The drive generates alarm ENCODER ERR and operates as if parameter 5002 ENCODER ENABLE =
0(DISABLE), that is, speed feedback is derived from the internal motor model.
5010 Z PLS ENABLE
Enables/disables the use of an encoder’s Z-pulse to define the motor shaft’s zero position. When enabled, a Z-pulse
input resets parameter 0146 MECH ANGLE to zero to define the shaft’s zero position. This function requires an encoder
that provides Z-pulse signals.
0 =
DISABLE – Z-pulse input is not present or ignored if present.
1 =
ENABLE – A Z-pulse input resets parameter 0146 MECH ANGLE to zero.
5011 POSITION RESET
Resets the encoder’s position feedback. This parameter is self-clearing.
0 =
DISABLE – Inactive.
1 =
ENABLE – Resets the encoder position feedback. Parameters reset depends on the state of parameter 5010 Z PLS
ENABLE:
• 5010 = 0 (
DISABLE) – Reset applies to parameters 0147 MECH REVS and 0146 MECH ANGLE.
• 5010 = 1 (
ENABLE) – Reset applies only to parameter 0147 MECH REVS.
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