This chapter explains the operating mode, control source, serial protocol, and RS485 baud rate in the Control Mode window. The control source and operating mode determine which commands the drive responds to, so verify the field control path before changing them.
Before You Begin
Item
What to Check
Target device
The main window is connected to the target drive, and the current connection ID matches the field device.
Device state
Before checking motor or encoder information or changing the control mode, stop the motor and make sure parameter changes, brake release, or position-reference changes cannot cause hazardous motion.
Parameter source
Use only the model, firmware, and delivery parameters confirmed for the project. Do not copy settings from a similar model or an older project.
Save strategy
After applying parameters, verify status and motion direction before deciding whether to save to Flash according to the project process.
High-risk operation: Encoder reset, operating mode, and control source can change the position reference, motion direction, or command source. Do not operate until field safety conditions are confirmed.
Recommended Procedure
Confirm that the main window is connected to the target drive and verify the current connection ID.
After opening a window, click Refresh first to read the current device parameters.
For an editable window, change only a few verified parameters at a time. Avoid changing the control mode and control source together.
After clicking Apply, wait for completion and then observe status, position readings, and motion direction.
Validate first at low speed over a short travel or with no load. If normal, follow the project process to decide whether to save to Flash.
Do not immediately run long-travel, high-speed, or heavy-load motion after resetting an encoder or changing the control source. For motion verification, use the low-risk procedure on the Motion page.
Control Mode
After connecting a device, click Control in the main window to open Control Mode.
Position controlSpeed controlTorque control
Operating-Mode Parameters
Parameter
Description
Recommendations
Operating Mode
Selects whether the drive interprets its target as position, speed, or torque. Analog parameters are hidden in position control and shown in speed and torque control.
Before switching, confirm the subsequent command source and field mechanical risks.
Control Source
Selects the current command source. Common options include 0 - Not Used and 1 - EtherCAT.
Confirm whether the project is controlled by eTuner, an external master, or another source.
Analog type
Shown in speed and torque control. Select 0 - Internal or 1 - External Analog Input. It is hidden in position control.
Select according to field wiring and client configuration. Do not mix internal commands with an external analog input.
Analog Parameters
InternalExternal Analog Input
Parameter
Description
Recommendations
Analog Value
Shown when Analog Type is Internal. Sets the internally used analog command.
After changing it, verify output direction and response under low-risk conditions.
Analog input
Shows the converted analog-input value in count/s for speed control or mA for torque control.
Use it to verify that the external input or internal setting matches expectations.
Filter Coefficient(0~1)
Shown for External Analog Input and smooths the analog input.
Stronger filtering may slow the input response.
Static Offset(mV)
Shown for External Analog Input and compensates for analog zero offset.
Verify compensation with the external input at zero or its reference value.
Dead-Band Width(mV)
Shown for External Analog Input and ignores small input changes near zero.
Too small may be affected by noise; too large may ignore small commands.
Gain
Shown for External Analog Input. Sets the conversion from input voltage to command in count/s/mV for speed control or mA/mV for torque control.
Set according to the external analog range and target speed or permitted current range.
RS485 Serial-Control Parameters
ModbusASCIIModbusRTU
Parameter
Description
Recommendations
Serial Communication
Sets the RS485 serial protocol to ModbusASCII or ModbusRTU.
Match the external master configuration.
RS485 Baudrate
Sets the RS485 communication rate.
Match the external master configuration.
Serial Port ID
Shown when ModbusRTU is selected. Sets the serial slave address.
Match the device address used by the external master.
Modbus Dis Time(ms):
Shown when ModbusRTU is selected. Sets the Modbus communication timeout.
Set according to the master's polling cycle and communication stability.
Control mode and control source determine which commands the drive accepts. If the device stops responding to eTuner or an external master, check the control source, operating mode, serial protocol, RS485 baud rate, and connection state.
Troubleshooting
Symptom
Recommended Action
Invalid parameter or function call after applying
Check whether the motor is enabled, the firmware supports the parameter, and the model and configuration match.
Encoder reading direction does not match motion direction
Stop motion immediately and check encoder direction, mechanical installation direction, motion direction, and control mode.
Abnormal position after encoder reset
Do not run target motion. First verify motor-side and load-side readings, zero reference, and multi-turn settings.
No control after switching the control source
Check whether eTuner still controls the device or control has switched to an external master, EtherCAT, RS485, or another source.
RS485 communication fails
Check the serial protocol, RS485 baud rate, master configuration, cable, and termination.
Load may fall after brake release
Stop the operation and verify load support and field safety measures. Never use a software button as a substitute for mechanical support or a safety device.
