Vitronics Soltec mySelective 6748 - Page 169

3.4 - SERVO CONTROLLER
Schematics & Parts mySelective.com
CHAPTER 3 11
A.C8 The multi-turn for the absolute encoder
was not properly cleared or set *
²
Encoder defective Replace servomotor
Servopack defective Replace servopack
A.C9 Communications between servopack and
encoder is not possible *
²
Incorrect or disconnected encoder wiring Check wiring and connectors at the
encoder
Encoder defective Replace servomotor
Servopack defective Replace servopack
A.CA
Encoder parameters are faulty *²
Encoder defective Replace servomotor
Servopack defective Replace servopack
A.Cb Contents of communications with
encoder is incorrect *
²
Incorrect or disconnected encoder wiring Check wiring and connectors at encoder
Encoder defective Replace servomotor
Servopack defective Replace servopack
A.CC Different multi-turn limits have been set
in the encoder and servopack
Incorrectly set Multi-Turn Limit Setting
parameter (Pn205) in the servopack
Change the value in parameter Pn205
No Multi-Turn Limit value set in the
encoder
First verify that the Multi-Turn Limit
Setting parameter (Pn205) is set correctly
in the servopack. While in the active
alarm state, change the setting in the
encoder Multi-Turn Limit Setting
parameter (Pn205) using function Fn013
A.d0 Position error pulse exceeded parameter
(Pn505)
Servomotor wiring incorrect or poor
connection
Check wiring and connectors at encoder
Servopack was not correctly adjusted Increase speed loop gain (Pn100) and
position loop gain (Pn102)
Motor load was excessive Reduce load torque or inertia. If problem
persists, replace with a larger capacity
motor
Position reference pulse frequency was
too high
• Increase or decrease reference
pulse frequency
• Add smoothing function
• Correct electronic gear ratio
Circuit board (1PWB) defective Replace servopack
A.E7 Option unit detection fails The SGDH is used immediately after
disconnection of an option unit without
clearing the unit detector
To use the SGDH after disconnecting the
option unit, execute Fn014 (option unit
detection result clear), in the auxiliary
function mode, and then cycle the power
Option unit connection is defective Check and correct the connection
Option unit is defective Replace the option unit
Connector Cn10 of servopack defective Replace servopack
A.F1 One phase is not connected in the main
power supply
One phase (L1, L2, or L3) of the main
circuit power supply is disconnected
• Check power supply
• Check wiring of the main circuit
power supply
• Check MCCB, noise filter,
magnetic contactor
There is one phase where the line voltage
is low
Check power supply
Servopack defective Replace servopack
ALARM DESCRIPTION CAUSE REMEDY