Motor Starter Settings

TeSys Tera system supports most of the starter logics with the inbuild starter logics and external inputs (start, stop, feedback, and so on) and switches the motor on or off with external contactors.

Motor start and stop is possible from LTMTCUF control operator unit (HMI), local control (Local DI), panel control (Remote DI), and communication (PLC or DCS). Motor starter logics also consider the feedback, such as, the contactor open or close status, and motor current to control the contactor. As per the starter selected, the required CONTACTOR_OUTPUT will be used for contactor control.

Parameter Settings

WARNING
UNINTENDED EQUIPMENT OPERATION The application of this product requires expertise in the design and programming of control systems. Only personnel with such expertise should be allowed to program, install, configure, alter and apply this product. Follow all local and national safety codes and standards. Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING

UNINTENDED EQUIPMENT OPERATION

The application of this product requires expertise in the design and programming of control systems. Only personnel with such expertise should be allowed to program, install, configure, alter and apply this product. Follow all local and national safety codes and standards.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

The motor starter settings can be set up using following interfaces:

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.

Parameter	Setting range	Default value
Starter Type	Direct Online Reverse Direct Online Star-Delta Custom logic 256 to Custom logic 511	Direct Online
Mode Selection	Disable HMI DI Communication	Disable
Local 1 Start	None Selection of a combination of the 5 control sources: HMI, Local DI, Remote DI, Communication, and Custom logic	Communication + Local DI + HMI
Local 2 Start	None Selection of a combination of the 5 control sources: HMI, Local DI, Remote DI, Communication, and Custom logic	None
Local 3 Start	None Selection of a combination of the 5 control sources: HMI, Local DI, Remote DI, Communication, and Custom	None
Remote Start	None Selection of a combination of the 5 control sources: HMI, Local DI, Remote DI, Communication, and Custom	None
Local 1 Stop	None Selection of a combination of the 5 control sources: HMI, Local DI, Remote DI, Communication, and Custom	Communication + Local DI + HMI
Local 2 Stop	None Selection of a combination of the 5 control sources: HMI, Local DI, Remote DI, Communication, and Custom	None
Local 3 Stop	None Selection of a combination of the 5 control sources: HMI, Local DI, Remote DI, Communication, and Custom	None
Remote Stop	None Selection of a combination of the 5 control sources: HMI, Local DI, Remote DI, Communication, and Custom	None
Local DI Start Input	Momentary Maintained	Momentary
Remote DI Start Input	Momentary Maintained	Momentary
Custom Start Input	Momentary Maintained	Momentary
Mode Transfer	Bump Bumpless	Bump
Communication Start Input	Momentary Maintained	Momentary
Change Direction	Disable Enable	Disable
Interlocking Time*	0.01 to 600.00 s in step of 0.01 s	60.00 s
Feedback Response Time	0.01 to 600.00 s in step of 0.01 s	0.5 s
Current Sensing Time	0.01 to 600.00 s in step of 0.01 s	0.5 s
Time in Star	0.01 to 600.00 s in step of 0.01 s	10 s
Change Over Time	0.01 to 600.00 s in step of 0.01 s	0.3 s
Stop Detection	Current based DI + Current based	Current Based
Forced Start Function	Disable Enable	Disable

Local and Remote Start Input Type

The Local DI Start Input parameter defines the type of command provided by the digital inputs used to start and stop the motor in Local 1, Local 2, or Local 3 operating mode.

The start switch input from the drawer or panel can be configured as Local start DI.

The Remote DI Start Input parameter defines the type of command provided by the digital inputs used to start and stop the motor in Remote operating mode.

The start input from control panel can be configured as Remote start DI.

Both parameters can be set separately to:

Momentary (default value): Two digital inputs are required to deliver the start and stop commands of the motor:
- One digital input for the Start command, triggered by a rising edge (if the input type is set as active high) or a falling edge (if the input type is set as active low) on the Start digital inputs as per the selected motor starter type.
- One digital input for the Stop command, triggered by a rising edge (if the input type is set as active high) or a falling edge (if the input type is set as active low) on the Stop digital inputs as per the selected motor starter type.
Maintained: Only one digital input is required to deliver the start and stop commands of the motor. Only digital inputs for the Start commands must be assigned as per the selected motor starter type. It is not required to assign a digital input to the Stop command.

Custom Start Input Type

The Custom Start Input parameter defines the type of command provided by the custom inputs used to start and stop the motor with the customized program. The parameter can be set to:

Momentary (default value): Two custom inputs are required to deliver the start and stop commands of the motor.
Maintained: Only one custom input is required to deliver the start and stop commands of the motor. Only custom inputs for Start commands must be programmed as per the selected motor starter type. It is not required to program a custom input for the Stop command.

Communication Start Input Type

Communication start input type defines the behavior of start and stop command from PLC or DCS. The parameter can be set to:

Momentary (default value): Separate start and stop commands are required from PLC or DCS.
Maintained: Only one command is required from PLC or DCS to start or stop the motor.

Feedback Timeout Detection

Feedback timeout detection function is used to check if the motor starts after activation of the RUN output. After activation of the RUN output, feedback timeout is detected if:

The motor current is not detected (IMAX < 10% IFLC) within the configured motor current sensing time.
The motor stop detection is configured as DI+IFLC, and if the status of the digital input assigned to the optional RUN DI has not changed within the configured feedback response time.

Feedback timeout detection is a stop cause of motor starters.

Feedback Response Time

This time is used by feedback timeout function, to stop the motor by deactivating RUN (CONTACTOR OUTPUT), in case of no detection of RUN DI (Contactor feedback signal) within configured feedback response time.

NOTE: Configure Stop detection setting as Current based+DI and one of the Digital input as RUN DI to enable the feedback response time functionality.

Current Sensing Time

This time is used by feedback timeout function, to stop the motor by deactivating RUN (CONTACTOR OUTPUT), in case of no detection of motor current within configured current sensing time.

Auto-Stop Detection

Auto-stop detection function is used to detect that the motor has stopped while the RUN output is still activated.

User can select the auto-stop detection mode:

Current based: Auto-stop detected if motor current IMAX < 5% IFLC.
Current based + DI (default value):
- If RUN DI (Contactor feedback) is configured: Auto stop is detected only if RUN DI indicates that the contactor is open.
- If RUN DI is not configured: Auto stop is detected if motor current IMAX < 5% IFLC.

Auto-stop detection is a stop cause of motor starters. On detection of Auto-stop, TeSys Tera motor starter logic deactivates the RUN (CONTACTOR OUTPUT).

RUN DI Assignment

The feedback timeout and the auto-stop detection can use a digital input assigned to RUN DI to get the feedback of the contactor.

The contactor contacts to wire in parallel to the digital input assigned to RUN DI depends on the motor starter type:

Direct Online: KM1
Reversible Direct Online: KM1 and KM2
Star-Delta: KM1 (no detection of the KM2 and KM3 feedback)

NOTE: TeSys Tera system only supports one feedback (RUN DI), the feedback signals from other contactors must be connected parallel to one (RUN DI) using the appropriate external interlocks for starts other than direct online starters.

Transfer Mode

In Bump mode, if you change the mode when motor is running, then the motor will stop. For example, if you change mode from Local 1 to Remote, motor will stop.

In Bumpless mode, the motor operation remains uninterrupted even after the mode is changed.

Change Direction

The change direction logic is applicable to the Reverse Direct Online starter type.

TeSys Tera system can change direction from forward to reverse and reverse to forward according to one of two logics:

Logic with Change direction parameter set to Enable. This logic does not require a Stop command.
- If a Reverse Start command from a valid source is received while the motor is running forward, TeSys Tera system deactivates the forward contactor and starts the Interlock timer. Once the Interlock timer is elapsed, the TeSys Tera system activates the reverse contactor.
- If a Forward Start command from a valid source is received while the motor is running reverse, TeSys Tera system deactivates the reverse contactor and starts the Interlock timer. Once the Interlock timer is elapsed, the TeSys Tera system activates the forward contactor.
NOTE: The settings of the interlocking time must be greater than the contactor opening time of the system connected.
Logic with Change direction parameter set to Disable. This logic requires a Stop command from a valid source as per the selected operating mode, Operating Modes. The Stop command starts the Interlock timer. Once the Interlock timer is elapsed, the motor can be started by a Start command in another direction.

Changeover Time

The changeover time is applicable to the Star-Delta starter types.

In Star-Delta , the changeover time is used to switch from Star to Delta connection. After the time in Star has elapsed, the TeSys Tera starter logic deactivates the Star CONTACTOR OUTPUT and waits for the changeover time to elapse. Once the changeover time has elapsed, theTeSys Tera starter logic activates the Delta CONTACTOR OUTPUT.