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Parameters
Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide 459
Issue Number: 1
Current Offset Current feedback offset error
225
The Current Offset trip indicates that the current offset is too large to be trimmed.
Recommended actions:
• Ensure that there is no possibility of current flowing at the output of the drive when the drive is not enabled
• Hardware fault – Contact the supplier of the drive
Current on stop Current at stop has not decayed
67
The current decay level detected after stop was >
25 % of the motor rated current resulting in possible acoustic noise on
removal of the Safe Torque Off (STO), Drive enable, or Fast disable input (if used) due to the load transfer onto the motors
mechanical brake.
Recommended actions:
• Reduce Motor Torque Ramp Time (D02) to achieve < 25 % current following at stop
Ctrl Watchdog Control word watchdog
77
Control Input Mode (H11) = 6 (Control word mode), and Control word bit 15 (Watchdog bit)
Control word watchdog bit has not been set to 1 for 1 s. It is assumed that the elevator controller or the comms interface
between the elevator controller and the drive have stopped working.
This is a delayed trip, where travel will complete (Elevator Software State (J03) = 0) and then the drive will trip. If a delayed
trip has been scheduled during travel (Elevator Software State (J03) >
0) then Global Warning (L04) = On (1) indicating
that there is a delayed trip scheduled to occur when travel completes.
Data Changing
Drive parameters are being changed
97
A user action or a file system write is active that is changing the drive parameters and the drive has been commanded to
enable, i.e.Drive Active (L06) = On 1).
Recommended actions:
• Ensure the drive is not enabled when one of he following is being carried out
•Loading defaults
•Changing drive mode
•Transferring data from NV Media Card
•Transferring user programs
Derivative Image Derivative Image error
248
The Derivative Image trip indicates that an error has been detected in the derivative image.
Recommended action:
• Contact the supplier of the drive
Destination Two or more parameters are writing to the same destination parameter
199
The Destination trip indicates that output destination parameters of two or more logic functions within the drive are writing to
the same parameter.
Recommended actions:
•Set Pr mm00 to ‘Destinations’ or 12001 and check all visible parameters in all menus for parameter write conflicts
Dir change Direction change occurred during operation
76
The direction selected during the start sequence has changed, this is applicable for both single and dual direction inputs. In
this state a controlled stop will occur followed by the trip.
Recommended actions:
• Check the direction input is being selected during the complete travel
• Check the control connection on terminal T28
• Check T28 Digital Input 05 State (F07) = On (1) during operation default configuration)
This is a delayed trip, where travel will complete (Elevator Software State (J03) = 0 and then the drive will trip. If a delayed
trip has been scheduled during travel (Elevator Software State (J03) >
0 then Global Warning (L04) = On (1) indicating
that there is a delayed trip scheduled to occur when travel completes.
Trip Diagnosis
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