UM0240 datasheet(30/39 Pages) STMICROELECTRONICS

30 / 39 page

Software

UM0240

30/39

sends a sequence of messages to one or more Slaves. If the messages are correctly

received from Slaves, they are re-sent to the Master.

11.2

Motor control

Motor Control FW loaded on Industrial Communication Board can be accessed by the user

through a dedicated GUI.

SW is able to recognize the attached evaluation board and automatically set up the specific

controls.

Using the control panel, the operating conditions for the application can be selected. For

example for Stepper Motors, there is stepping mode selection.

From the control panel, full step (normal), half step or micro stepping mode (micro stepping

is only supported for the L6208) can be selected.

Other controls on the top line let the user select the direction of rotation and the decay mode

during recirculation.

Figure 17.

Stepper motor GUI

The actual movement parameters are selected in the second and third row of controls. The

controls on the second row allow the user to set the top speed and the acceleration and

deceleration rate.

The typical run profile for a movement includes an acceleration ramp, constant velocity run

and deceleration ramp as shown here. All of these parameters are set on the control panel.

In many applications, the torque needed to accelerate and decelerate is significantly larger

than that required for the constant speed running so the designer may want to drive the

motor with a higher current during the acceleration and deceleration time and then drop the

current to a lower level during the constant speed portion of the movement to reduce the

dissipation.

UM0240 Datasheet(PDF) 30 Page - STMicroelectronics