Monitoring Records

Description

The data recording function of LTMT main unit keeps time stamped data records for further diagnostics. This function helps to record the sequence of events that has occurred.

There are different types of data recorded such as trip records, event records, device internal records, and motor start records.

The records are available through:

• A PC running the TeSys Tera DTM embedded in a FDT container such as SoMove software.

• The LTMTCUF control operator unit.

• A PLC or DCS through the communication network.

Date and Time

The LTMT main unit date and time is used to time stamp the data records.

The date and time can be configured using:

• A PC running the TeSys Tera DTM embedded in a FDT container such as SoMove software

  .

• The LTMTCUF control operator unit.

• A PLC or DCS through the communication network.

Trip Records

The LTMT main unit records the last 20 encountered trips. Each trip record contains the following information:

• Record ID

• Time stamp

• Trip cause

• Following values are recorded at the time of the trip:

  • Thermal memory

  • RMS and ground currents

  • RMS voltages

  • Current and voltage imbalances

  • Current and voltage THD

  • Current and voltage phase sequence

  • Active power

  • Power factor

  • Frequency

  • Motor status

  • Full load current of motor

  • Temperature input

  • Analog input

  • Trip code

For more information on trip codes, refer to Trip Code.

Event Records

The LTMT main unit records the last 100 encountered events. Each event record contains the following information:

• Record ID

• Time Stamp

• Event

• Event Code

For more information on event codes, refer to Event Code .

Device Internal Records

The LTMT main unit records the last 20 internal detected errors. Each device internal record contains the following information:

• Record ID

• Time Stamp

• Event

• Event Code

For more information on device internal controller detection codes, refer to Device Internal Error Code.

Motor Start Records

The LTMT main unit records 250 current values measured during the last motor start. The sampling interval is computed internally by the LTMT main unit, based on the trip class setting of thermal overload protection.

Refer the following table for motor start curve sampling interval:

One record can be saved to serve as motor start reference record.

The last motor start record can be saved as reference record by using:

• TeSys Tera DTM.

• Command from a PLC or DCS through the communication network.

The last motor start record and the reference record:

• Can be displayed with the TeSys Tera DTM.

• Are available for PLC or DCS through the communication network.