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Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide 147
Issue Number: 1
A55 (Start Lock Enable I22)
When set to Off (0), the Start lock enable control is disabled and in some configurations, i.e. low resolution position feedback devices resulting in low
Start speed loop gains, some roll back could be encountered. When set to On (1), the Start lock enable control is enabled. The position loop is used
to maintain the position of the motor during brake release. If a previous travel has been completed, the position of the motor after the brake has been
applied, but before the drive is disabled is stored and used as the set point position to provide a smooth transition of load from the mechanical brake
to the motor on the next travel. This feature can be useful to overcome roll back instability and acoustic noise, when a low resolution position
feedback device is being used resulting in the Start speed loop gains being limited. In Open loop mode Start lock enable control is not available.
A56 (Start Lock P Gain Speed Clamp I21)
This sets the Start Lock P Gain Speed Clamp i.e. the maximum speed used to correct the motor position which is used to hold the position of the
motor during brake release. This is used when A55 (Start Lock Enable I22) = On (1)
A57 (Start Lock P Gain (I20)
This sets the Start Lock P Gain, used to hold the position of the motor during brake release. This is active when A55 (Start Lock Enable I22) = On (1).
The Start lock P Gain should be optimized in line with the Start speed loop gains to avoid any instability or acoustic noise during starting. Initial start
optimization should be carried out with only the Start speed loop gains, if roll back or acoustic noise and instability occurs the Start speed loop gains
may need to be reduced slightly and the Start lock position control enabled.
A58 (Start Optimizer Time G48)
The start optimization uses the time, speed and jerk, in order to define the start optimizer motion profile. The maximum acceleration during start
optimization is defined by the Acceleration rate.
This feature can help overcome starting stiction for elevators installed with a motor gearbox, or for systems installed with guide rail pads rather than
rollers, or in retro fit applications where imperfections in the guide rails result in reduced starting performance.
The start optimizer can be used in Open loop mode to provide a holding speed reference during brake release, and to overcome stiction within the
gearbox. A request to release / open the brake in Open loop control mode using start optimization will not be carried out unless the start optimizer
speed is reached.
A55 {I22} Start Lock Enable
RW Num US
OL
Ú Ö
RFC-A
Off (0) or On (1) Off (0)
RFC-S
A56 {I21} Start Lock P Gain Speed Clamp
RW Num US
OL
Ú Ö
RFC-A
0 to 10000 mm/s 100 mm/s
RFC-S
A57 {I20} Start Lock P Gain
RW Num US
OL
Ú Ö
RFC-A
0.000 to 1000.000 50.000
RFC-S
A58 {G48} Start Optimizer Time
RW Num US
OL
Ú Ö
RFC-A
0 to 10000 ms 1000 ms
RFC-S
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