Teco Electro Drives TSTA-20

Questions and Answers

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Jennifer GoodAug 19, 2025
What to do if Teco Electro Drives Controller shows over-voltage (regeneration error)?
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  davisdanielSep 12, 2025
  If the Teco Electro Drives Controller shows an over-voltage (regeneration error), it could be due to the main circuit voltage exceeding the maximum allowable value (410V) or excessive regeneration voltage. First, use a multimeter to verify that the input voltage is within the specified limit. Then, check parameter Cn012 to ensure it is set correctly. If the alarm occurs during operation, try extending the acceleration/deceleration time or reducing the load ratio within the permitted range. If the issue persists, an external regeneration resistor may be needed.
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stephenwhiteAug 21, 2025
What to do if Teco Electro Drives TSTA-20 Controller displays drive over-current?
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  Andrew SullivanAug 21, 2025
  If your Teco Electro Drives Controller displays a Drive Over-current error, it may be due to an over-current in the drive's main circuit or a transistor error. First, check the connections of the motor cable (U, V, W) and the encoder, as well as the power cable connection. If the alarm persists, turn off the power, wait 30 minutes, and then turn it back on. If the alarm continues, there may be a power module malfunction or noise interference, and the drive may need testing and repair.
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Sue MurphyAug 23, 2025
How to fix motor overload on Teco Electro Drives Controller?
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  James RamirezAug 25, 2025
  If the Teco Electro Drives Controller indicates a motor over-load, it means the drive has exceeded its rated load during continuous operation. When the loading equals twice the rated loading, the alarm will occur within 10 seconds. Check the motor terminal connections (U, V, W) and the encoder connection. Also, adjust the drive gain, as an incorrect gain setting can cause motor vibration and a large current, leading to motor overload. You can also extend the acceleration/deceleration time or reduce the load ratio within the permitted range.
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Frank Young DDSAug 26, 2025
What causes motor over-current in Teco Electro Drives TSTA-20 Controller?
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  ywellsAug 26, 2025
  If the Teco Electro Drives Controller is showing a 'Motor over-current' error, it means the motor current is four times greater than the rated current. Check if the motor wiring (U, V, W) and encoder wiring are correct. Internal interference or malfunction could also be the cause. Ensure all connections are correct.
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patricia92Aug 28, 2025
How to resolve motor over speed error on Teco Electro Drives TSTA-20?
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  sstevensAug 28, 2025
  If your Teco Electro Drives Controller displays a 'Motor over speed' error, it means the motor's speed is 1.5 times greater than its rated speed. To resolve this, reduce the speed command. Also, verify that the electronic gear ratio is correct. Adjust the speed loop gains (Sn211 & Sn213) for better motor response.
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Tina ClarkAug 30, 2025
What causes Encoder ABZ phase signal error in Teco Electro Drives TSTA-20?
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  mhatfieldAug 30, 2025
  If the Teco Electro Drives Controller shows an 'Encoder ABZ phase signal error', it indicates a failure in the motor’s encoder or a problem with the encoder connection. Check the motor’s encoder connections for any issues. Inspect the encoder for short circuits, poor solder joints, or breaks. Also, check the encoder signal terminals CN2-1 and CN2-2 (power cable 5v).
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Cody CombsSep 1, 2025
Why does Teco Electro Drives Controller show Emergency Stop error?
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  Sarah JenningsSep 1, 2025
  If the Teco Electro Drives Controller displays an 'Emergency Stop' error, it means the input contact point EMC is activated. To solve this, disable the Emergency Stop signal input. If the issue persists, it may indicate an internal malfunction. Ensure that all connections are correct.
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Raymond RuizSep 3, 2025
How to troubleshoot position error on Teco Electro Drives Controller?
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  Donald NorrisSep 3, 2025
  If the Teco Electro Drives Controller shows a 'Position error', this means that the deviation between the pulse command and encoder feedback (position error) is greater than the setting of Pn308 or Pn309. To fix this, increase the position loop gain (Pn310 and Pn311) setting value. You can also increase the position tolerance value by adjusting Pn307 for better motor response, extend the time of acceleration/deceleration, or reduce load inertia within the permitted range. Finally, check if the motor wiring (U, V, W) is correct.
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Susan PotterSep 5, 2025
What to do if Teco Electro Drives Controller shows under-voltage?
- O
  osimmonsSep 5, 2025
  If the Teco Electro Drives Controller displays an 'Under-voltage' error, it means the main circuit voltage is below its minimum specified value (190Vac). Use a multimeter to check whether the input voltage is within the specified limit. If the problem persists, there may be a failure inside the drive.
A
Alfred SalasSep 7, 2025
Why Teco Electro Drives TSTA-20 Controller showing drive disable error?
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  Andrew YangSep 7, 2025
  If the Teco Electro Drives Controller shows a 'Drive disable' error, it means that input contacts CCWL & CWL are operated at the same time. To resolve this, remove the input contact signal CCWL or CWL. Check all input wiring for correct connections. Refer to Section 5-6-1 for the selected High/Low logic potential settings.

Summary

Warning and Alert

Warning

Precautions for electrifying and changing components.

Alert

Precautions related to temperature, testing, and parameter settings.

Chapter 1 Checking and Installing

1-1 Checking Products

Pre-installation checks for damage, assembly, and components before sealing.

1-1-1 Confirming with Servo Drives

Explanation of model coding for TSTA series AC input voltage and output power.

1-1-2 Confirming with Servo Motors

Explanation of model coding for TSB/TSC servo motors including frame, power, speed, voltage, and optional features.

1-4-1 Environmental Conditions

Specifies ambient temperature, humidity, vibration, and storage conditions for AC drives.

1-5-1 Environmental Conditions

Specifies ambient temperature, humidity, vibration, and location conditions for servo motors.

Chapter 2 Wiring

2-1-1 Wiring for Main Circuit and Peripheral Devices

Illustrates the main circuit and peripheral device wiring diagram for the servo system.

2-1-2 Wiring for Servo Drives

Provides detailed wiring specifications, length limits, and precautions for servo drives to prevent noise and ensure correct operation.

Explanation of General I;O Signal Function

Detailed explanation of signal names, function symbols, modes, I/O operations, and related chapters for various I/O signals.

Signal Name Function Symbol Mode I;O Operation and Function Chapter

Continues the explanation of I/O signals, including power output terminals and their functions.

Digital Input Function

Explains digital input functions, including their I/O operations, and refers to related parameters.

Digital Input Function Explanation

Details digital input function explanations, including internal position command selection and its associated parameters.

Digital Output Function Explanation

Explains digital output functions and their I/O operations, including servo ready, alarm, and speed status.

2-3-1 Position Control Mode (Pe Mode) (Line Driver)

Wiring diagram for Position Control (Pe Mode) using Line Driver, illustrating external pulse positioning command.

2-3-2 Position Control Mode (Pe Mode) (Open Collector)

Wiring diagram for Position Control (Pe Mode) using Open Collector, illustrating external pulse positioning command.

2-3-3 Position Control Mode (Pe Mode) (Pi Mode)

Wiring diagram for Position Control (Pi Mode), illustrating internal position command.

2-3-4 Speed Control Mode (S Mode)

Wiring diagram for Speed Control (S Mode), showing analog speed input and digital control connections.

2-3-5 Torque Control Mode (T Mode)

Wiring diagram for Torque Control (T Mode), illustrating analog torque and digital control connections.

Chapter 3 Panel Operator; Digital Operator

Parameter Setting Procedures

Explains how to view and alter parameter settings using the keypad, including saving changes and navigating digits.

dn-05 (JOG Operation)

Step-by-step instructions for performing JOG operation on the motor, including speed and direction settings.

Chapter 4 Trial Operation

4-1 Trial Operation Servo motor without Load

Step-by-step guide for trial operation of a servo motor without load, including installation, wiring, power application, and alarm handling.

Keypad Trial run (JOG function)

Explains how to use the JOG function for keypad trial runs to check motor speed and rotation direction.

Setting JOG Function

Provides step-by-step instructions for setting the JOG function, including motor run direction and stopping.

B. Trial run in Speed control mode(Cn001=1)

Details trial run procedures for speed control mode, including wiring checks, servo activation, and speed command relationships.

C. Position control mode trial run (Cn001=2).

Guides on conducting a trial run in position control mode, including electronic gear ratio setup and motor confirmation.

Chapter 5 Control Functions

5-2 Torque mode

Explains the application and process diagram of Torque mode for controlling torque in machines.

5-3 Speed Mode

Explains Speed Mode for applications requiring precise speed control, showing system diagrams for speed processing and control.

5-3-1 Selection for speed command

Details how to select speed commands using external analog input or internal preset limits via input contacts SPD1/SPD2.

5-3-10 Torque limit of speed control mode

Explains how to set torque limits in speed control mode using input contact TLMT or external analog commands PIC/NIC.

5-4 Position mode

Introduces Position Control mode for high-precision applications, outlining its two methods: external pulse and internal command.

5-4-1 External Pulse Command

Details four types of external position pulse command signals (Pn301.0) and their logic selections (Pn301.1).

5-4-2 Internal Position Command

Explains internal position command mode, preset position commands (Pn317-Pn364), and their activation via POS1-POS4 contacts.

5-4-3 Electronic Gear

Explains the use of electronic gear ratio to scale command output pulse and provides calculation examples for transmission devices.

5-4-8 Original Home

Explains the Home routine for finding and setting a reference point, using input contacts ORG, CCWL, CWL, or Z phase.

5-5-1 Automatic Adjusting

Describes the ON-LINE Auto tuning feature for measuring load inertia and automatically adjusting servo gain.

5-5-2 Manual Adjustting

Explains manual gain adjustment procedures for speed and position control modes when auto tune is not suitable or not used.

5-6-1 Programmable I;O Functions

Explains programmable Digital Inputs (DI-1 to DI-13) and Digital Outputs (DO-1 to DO-4) and their functions.

Programmable Digital Input Functions (DI-2 to DI-13)

Lists programmable digital input functions for DI-2 through DI-13, referring to Hn501 for options.

Chapter 6 Parameter

System Parameters

Details system parameters like Control Mode Selection (Cn001), SON Input (Cn002.0), CCWL/CWL Input (Cn002.1), Auto Tuning (Cn002.2), and EMC Reset (Cn002.3).

System Parameters (Continued)

Continues system parameters, covering Encoder Pulse Output (Cn005), Analog Monitor Selection (Cn006), Speed Reached Preset (Cn007), Brake Mode (Cn008), and Drive Inhibit (Cn009).

Torque Control Parameters

Details torque control parameters including acceleration/deceleration method (Tn101), time period (Tn102), and torque command ratio (Tn103).

PI;P Control Mode Switch and Gain Switching

Explains PI/P control mode switching conditions (Cn016-Cn019) and automatic gain switching conditions (Cn021-Cn022).

Automatic Gain Switching Conditions and Rigidity Setting

Details automatic gain switching conditions for acceleration/position error (Cn023, Cn024) and rigidity settings for auto tuning (Cn026).

Torque-Control Parameters

Details torque control parameters including acceleration/deceleration method (Tn101), time period (Tn102), and torque command ratio (Tn103).

Torque Command Offset and Speed Limits

Covers torque command offset (Tn104), preset speed limits (Tn105-Tn107), and torque output monitor (Tn108).

Speed-Control Parameter

Details speed control parameters including internal speed commands (Sn201-Sn203), zero speed selection (Sn204), and accel/decel smooth methods (Sn205).

Position Control Parameter

Details position control parameters including pulse command selection (Pn301.0), logic (Pn301.1), inhibit (Pn301.2), and electronic gear ratio numerators (Pn302-Pn305).

Position Control Parameters (Continued)

Continues position control parameters: electronic gear ratio denominator (Pn306), position complete value (Pn307), error bands (Pn308, Pn309), and loop gains (Pn310, Pn311, Pn312).

Position Command Smoothing, Direction, and Error Clearing

Details position command smoothing (Pn313), direction definition (Pn314), and pulse error clear modes (Pn315).

Internal Position Command Modes and Parameters (1-4)

Explains internal position command modes (Pn316) and covers parameters for commands 1-4 (rotation, pulse, speed).

Internal Position Command Parameters (5-10)

Details parameters for internal position commands 5 through 10, covering rotation, pulse, and move speed.

Internal Position Command Parameters (11-16)

Details parameters for internal position commands 11 through 16, covering rotation, pulse, and move speed.

Home Routine Settings (Pn365.0)

Explains settings for the home routine, including search direction and reference activation based on Pn365.0.

Home Routine Settings (Pn365.1, Pn365.2)

Details settings for home routine search method (Pn365.1) and start method (Pn365.2).

Home Routine Settings and Offset Parameters

Covers stopping mode (Pn365.3), home search speeds (Pn366, Pn367), and position offset parameters (Pn368, Pn369).

Multi-Function Input Parameters

Explains multi-function input parameters (Hn501 series) for digital inputs, including signal functions and logic state selection.

Multi-Function Digital Input Parameters (DI-2 to DI-13)

Lists programmable digital input functions for DI-2 through DI-13, referring to Hn501 for options.

Digital Outputs (DO-1 to DO-4)

Details programmable Digital Outputs (DO-1 to DO-4), including logic state selection and default functions.

Chapter 7 Communication Function

7-1-2 RS-232 Communication protocol and format

Details the RS-232 communication protocol, including baud rate, parity, data bits, stop bit, and read/write word formats.

RS-232 Read Consecutive Words Format

Explains the format for reading consecutive words via RS-232, including function codes and response messages.

RS-232 Write Word and Consecutive Words Format

Details formats for writing single words and consecutive words via RS-232, including function codes and check sums.

7-1-3 Modbus communication protocol for RS-485

Describes Modbus protocol for RS-485, including coding methods (ASCII, RTU) and character sets.

Common Function Codes (Read, Diagnostic)

Explains common function codes like Read Register (03H) and Diagnostic (08H) in ASCII and RTU modes with query/response examples.

06 H: Write Single Register

Details the Write Single Register function code (06H) for writing a word to a register in ASCII and RTU modes.

08 H: Diagnostic function

Explains the Diagnostic function code (08H) for checking communication signals between master and slave in ASCII and RTU modes.

10 H: Write Multiple Registers

Details the Write Multiple Registers function code (10H) for continuously writing N words to registers in ASCII and RTU modes.

Chapter 8 Troubleshooting

8-1 Alarm functions

Explains alarm codes and their display format, and how to identify and resolve alarm messages.

8-2 Troubleshooting of Alarm and Warning

Details alarm codes, names, descriptions, corrective actions, reset methods, and fault status digital outputs.

Troubleshooting Alarms and Warnings (Continued)

Continues troubleshooting alarms, covering position error, motor over-speed, CPU error, drive disable, and drive overheat.

Alarm Reset Methods

Explains methods for resetting alarms by input signal, keypad, or power reset, including important warnings before power restoration.

Chapter 9 Specifications