Preventing Un-Authorized Parameter Editing - ABB ACS255 User Manual

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Parameters in the Long parameter mode
Index Name/Selection
112 Vector mode advanced motor
data
11201 MOTOR STATOR
RESISTANCE (Rs)
11202 MOTOR ROTOR
RESISTANCE (Rr)
11203 MOTOR STATOR
INDUCTANCE (Lsd)
11204 MOTOR MAGNETISING
CURRENT (Id rms)
11205 MOTOR LEAKAGE
COEFFICIENT (Sigma)
11207 Quick Rs Measurement
Enable
0 : DISABLE
1 : ENABLE
11208 MOTOR PARAMETER
ADAPTATION ENABLE
0 : DISABLE
1 : ENABLE
11209 PULSE WIDTH MINIMUM
LIMIT
0...500

9.5. Preventing un-authorized parameter editing.

This function can be used to prevent an un-authorized person from changing the drive parameter values; this function is disabled when delivered
from the factory.
Relevant Parameters
Parameter Access Unlock
1602
0...65535
Parameter Access code
1603
0...65535
Locking Parameter Access
1) Go to Parameter 1603 (Long Parameter group) and enter in your chosen parameter access code.
2) Press the button to exit and parameter 1603 will then be hidden and all parameters will be "Read only" (except for Parameter
1602 which will remain "Read Write".
Unlocking Parameter Access
1) Enter into Parameter 1602 the same value as 1603 (as chosen in step 1 above).
2) All parameters will now be "Read Write" and parameter 1603 will become visible and show the value which was originally
programmed as the parameter access code.
3) To disable this feature set parameter 1603 PARAMETER ACCESS CODE to zero and then 1602 PARAMETER ACCESS UNLOCK to
zero.
Description
Only valid when parameter 9903 Motor Control Mode is 0,1, 3.
WARNING! The following parameters are used internally by the drive to provide optimum
possible motor control. Incorrect setting of the parameters can result in poor performance
and unexpected behaviour of the motor. Adjustments should only be carried out by
experienced users who fully understand the functions of the parameters.
Motor stator resistance value measured during the autotune.
Phase to phase rotor resistance value in ohms.
For induction motors: phase stator inductance value.
For induction motors: magnetizing / no load current. Before Auto-tune, this value is
approximated to 60% of motor rated current (parameter 9906 MOTOR RATED CURRENT),
assuming a motor power factor of 0.8.
Motor leakage inductance coefficient
Allows the stator resistance parameter 11201 MOTOR STATOR RESISTANCE to be adapted
during normal operation.
Allows the stator inductance parameter 11203 MOTOR STATOR INDUCTANCE to be adapted
during normal operation.
This parameter is used to limit the minimum output pulse width, which can be used for long
cable applications. Increasing the value of this parameter will reduce the risk of over-current
trips on long motor cables, but will also reduce the maximum available output motor voltage
for a given input voltage.
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