Function and interface

We can control the 32 controllers though the RS485 bus, the handle can be powered from the main board of the controller through the RS485 bus, without the need for a separate power supply. Finally, the mode of RS485 bus communication is realized, and the miniaturization of Nanomotor controller is completed.

Basic Function

SDRV01-HC handle controller has four basic functions as follows:

(1) controller selection,

(2) Nanomotor selection,

(3) Jog control,

(4) Positive and backward single step motion and positive and backward continuous motion

1. Power supply switch

   Turn ON all nanomotor controllers and slide the power ON/OFF switch located at the top of the unit to the ON (“I”) position. The controller will then supply power to the handpad and start communicate it.

2. Connecting the SDRV01-HC Controller

2.1 Connecting the SDRV01-HC to Single Controller

The SDRV 01-HC connects directly to the SDRV01-R controller’s RS 485 port.Therefore, only the controller’s Ethernet and RS-485 port will be available for computer interfacing, if needed.

2.2 Connecting the SDRV01-HC to Multiple Controller

SDRV01-HC controller can control up to 32 SDRV01-R controller, the SDRV01-HC can be regarded as the main controller to select all 32 cascade controller, but all are based on the RS485 communication bus, and can be connected to PC through Ethernet and RS-485 port.

Multiple Controller Setup

NOTE:Nanomotor controllers will only execute move commands from one source (SDRV01-HC or PC) at any given time.

NOTE: Do not connect the PC to SDRV01-HC,only the controller’s Ethernet and RS-485 port will be available for computer interfacing.

3. Using the SDRV01-HC

3.1 Controller Selection

The total number of Nanomotor controllers can be selected by the SDRV01-HC.Handpad is limited by the number of controllers interconnected via daisy-chained RS-485 local area network (LAN).

NOTE: The controller that has the SDRV01-HC connected to its USB port automatically becomes the RS-485 LAN Master Controller.

When the SDRV01-HC handle controller access, it first checks to see if it has scanned the RS-485 LAN since it has been powered ON. If it has never scanned before, it will automatically initiate a scan process to check for all connected controllers. If it finds two or more controllers with the same address during this process, it will resolve the address conflicts automatically. At the end of a scan, all controllers on the RS-485 LAN will have unique addresses between 1 and 31. This scan process can take an extra 2-3 seconds to complete. Thereafter, when the controller detects the presence of the SDRV01-HC, it will refer to the last scan data to know what other controllers are connected to the LAN.

3.2  Motor Selection

The model 8742 controller supports up to four open-loop Nanomotors. The SDRV01-HC Handpad motor selection area includes two buttons and four LEDs. The top, up pointing arrow (↑) button decreases the motor selection number while the bottom, down pointing arrow (↓) increases the motor selection number. The green LED indicators to the right of the button show the current motor selected. (See figure below)

Motor Selection

If the controller SDRV01-R is selected , then any one(1) of four(4) motors can be selected.

3.3  Speed Jog Control

The variable speed jog control, or thumbstick, makes it possible for the user to jog the

one selected motor in either forward (positive) or reverse (negative) direction at

varying speeds. As the thumbstick is gradually tilted vertically upward, the connected

motor will correspondingly jog forward with increasing speed. Tilting the thumbstick

vertically downward will achieve the same effect but in the opposite direction. Note

that all horizontal tilting is ignored.

The factory default setting is set to 20 steps / seconds without variable speed.

3.4  Single-Step & Continuous Jog Control

The single-step & continuous jog control buttons – or step buttons – makes it possible

for the user to move the selected motor in either forward (positive) or reverse (negative) direction – one controlled step at a time. It also has as dual function in that the same buttons can be used to perform continuous motion at a predetermined speed.

The way it works is that the top button, with up pointing double-arrow next to it,

increments the motor position by one step. The bottom button, with down pointing

double-arrow next to it, decrements the motor position one step. (See figure below).

4. Diagram

The SDRV01-HC can only set the Nanomotor controller's device address to 0~31.

4.1

Using of the controller

4.2

Connection between the controller and the handle controller

Note:The handpad can be connected to any controller, and one handpad can control all the controllers.

4.3

The controller can be connected to the PC through the 485 to Ethernet module

4.4

The controller can be connected to the PC through the 485 to USB module 

Order information and specification: