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Diagnostics Optimization CT MODBUS RTU Technical Data
332 E300 Design Guide
Issue Number: 1
This parameter is only used when Start Lock Enable (I22) = On (1).
When set to 0, this parameter disables movement compensation between when the mechanical brake is applied at the end of travel to when the
torque is removed from the elevator motor.
When set > 1, this parameter enables compensation for the movement of the elevator motor shaft from when the mechanical brake is applied at the
end of travel to when the torque is removed from the elevator motor. This gives a smooth transition of load from the mechanical brake to the motor on
the next travel. The second function is to set a maximum limit for the position change that can be used in the compensation, which is expressed as a
percentage of the diameter from 0.01 % to 2.55 %. This is to prevent a mechanical fault from introducing an excessive position change into the
position controller. In the event that the position change for a travel was greater than Start Lock Position Change Maximum % (I23), the movement
compensation is not used for the next travel but the position controller will still operate.
A notch filter can be inserted be applied to the Final Current Reference (J20) to remove the effect of a mechanical resonance in the system. Notch
Filter Centre Frequency (I24) defines the centre frequency (f
0) in Hertz and Notch Filter Bandwidth (I25) defines the bandwidth (fBW) which is the
frequency difference between the 3dB points of the notch filter in Hertz. The centre frequency should be set slightly below the resonant frequency of
the mechanical load. The Q of the filter is given by Q = f
0 / fBW. If Notch Filter Bandwidth (I25) is at its default value of zero, then the notch filter is
disabled. It should be noted that although it is possible to set a bandwidth that is higher than half the centre frequency, the bandwidth of the filter is
limited to half the centre frequency.
See Notch Filter Centre Frequency (I24).
I23 Start Lock Position Change Maximum
Mode RFC A, RFC-S
Minimum 0.00 Maximum 2.55
Default 0.00 Units %
Type 8 Bit User Save Update Rate Background
Display Format Standard Decimal Places 2
Coding RW, BU
I24 Notch Filter Centre Frequency
Mode RFC A, RFC-S
Minimum 50 Maximum 1000
Default 100 Units Hz
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW
I25 Notch Filter Bandwidth
Mode RFC A, RFC-S
Minimum 0 Maximum 500
Default 0 Units Hz
Type 16 Bit User Save Update Rate Backround Read
Display Format Standard Decimal Places 0
Coding RW
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