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Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide 259
Issue Number: 1
Balanced elevator car:
For a balanced elevator car, the torque shown in Load Cell Compensation Torque (E13) must be 0. If it is not 0 adjust the offset for the analog input
used.
Empty elevator car
After the balanced elevator car load cell offset has been made, the scaling for the analog input used must be modified with an empty elevator car.
When the brake releases but before the elevator car accelerates, if the scaling for the analog input used is setup correctly then Speed Error (J31) = 0
(in RFC-A and RFC-S mode) and Final Torque Reference (J27) = Load Cell Compensation Torque (E13), indicating that the torque reference
required to hold the car still is provided by the load cell compensation.
This sets the load cell compensation filter time constant in ms units. It may be increased to remove electrical noise from the load cell signal during
travel, or to reduce the effect of mechanical disturbances on the load cell feedback.
This indicates the final load cell measurement compensation torque in 0.01% of system rated torque units.
Inertia Compensation Mode Select (E14) selects the inertia compensation mode as shown below.
0 (None)
No inertia compensation.
Parameter Description
Load Cell Compensation Torque (E13) Enables the load cell compensation torque offset to be applied.
Load Cell Compensation Input (E11)
The input to the load cell compensations scheme. This is used as the destination for the analog
input which receives the load cell signal.
Load Cell Compensation Filter Time Constant
(E12)
Filters the final load cell torque reference such that the effect of electrical noise in the load cell
signal, or mechanical disturbances during travel affecting the load cell compensation are
minimized.
Load Cell Compensation Torque (E13) Indicates the final torque reference in 0.1 % of system rated torque units.
E12 Load Cell Compensation Filter Time Constant
Mode Open-Loop, RFC-A, RFC-S
Minimum 0 Maximum 32767
Default 100 Units ms
Type 16 Bit User Save Update Rate Background
Display Format Standard Decimal Places 0
Coding RW
E13 Load Cell Compensation Torque
Mode Open-Loop, RFC-A, RFC-S
Minimum −VM_USER_CURRENT Maximum VM_USER_CURRENT
Default 0.0 Units %
Type 16 Bit User Save Update Rate 4 ms read
Display Format Standard Decimal Places 1
Coding RW, VM
E14 Inertia Compensation Mode Select
Mode RFC-A, RFC-S
Minimum 0 Maximum 2
Default 0 Units
Type 8 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW, TE
Value Text
0 None
1 Acceleration
2Torque
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