Applied Logic Engineering Serial to LANC Adapter Manuale utente

Serial to LANC Adapter

User’s Guide

Thank you for purchasing our controller product. The following information will help you successfully

connect this controller board and get it running in your application.

Connecting to power

The adapter comes standard with a USB “micro”size jack for connection to any compatible power

source. We supply a standard cable for connection to a PC USB port, but you can substitute any other

compatible cable and power the board from a DC adapter if you choose to do so. This power source

runs all circuitry on the board.

Note that this USB connection DOES NOT provide a data connection to the adapter –it is used only to

supply +5VDC power to the adapter board.

Powering the adapter from the LANC bus

PLEASE NOTE : This option is highly dependent on the capabilities of your camera! Please test before

using this power option to insure that your camera will supply the proper voltage to the controller

board!

The ALE716 adapter includes an alternative power scheme that will allow powering the adapter directly

from your camera’s LANC bus. However, the voltage supplied from the camera MUST BE greater than

6VDC in order for this option to work properly. As the battery is drained on the camera through normal

use, the voltage supplied on the LANC bus may drop below an acceptable level. If the operation of the

adapter becomes inconsistent while powering in this manner, make sure that the camera’s battery is

fully charged. Please be aware of this if you choose to power the adapter using this method.

The power input on the adapter is set at the factory to use the USB micro plug as the power source. To

switch to using power from the LANC bus, you must do the following:

1) Remove the four screws on the adapter’s top acrylic panel and remove it.

2) Next, locate the power supply option jumper as indicated below:

3) Move the jumper block from the current (top) position to the lower position, connecting the

bottom two pins with the jumper block.

4) Replace the top acrylic panel and the four screws.

Power Supply

Option jumper

block

Using this method, the connection to the USB port MUST be removed.

Plug the adapter board into the camera and turn the camera on. If everything is working correctly, the

adapter board will power on at the same time and will be ready to operate.

To return the adapter back to being powered from the USB jack, unplug the adapter from all power

sources (including the camera), move the jumper block back to the original position (connecting the top

two pins), and reapply power via the USB port.

Connecting the adapter to a PC

The adapter has a built in 9-pin Dsub connector for connection to a host’s serial (RS-232) port. This

could be a PC, Mac, Linux box, or other embedded system. The pinout of this connector on the adapter

conforms to standard PC serial port connections. Use a “straight through” cable (not a “null modem”

cable that crosses signal lines) to connect to your host system. The cable will require a socket (female)

9-pin connector for the host side and a pin (male) connector on the adapter side.

Connecting the controller board to a camcorder

The controller board comes with a LANC cable that is terminated in a standard 3-conductor, 2.5mm plug

that is compatible with Sony’s LANC connector on the camcorder. Simply plug one end of the cable into

the jack on the camera and the other end into the adapter board.

If your camera has the following type of connection, you will need to use our ALE707 or ALE709 adapter

cable to convert the 2.5mm plug on the standard cable into the 10-pin D connector. Please see

www.appliedlogiceng.com for more information.

Sending commands from the PC

In order to send LANC commands from your PC to the camera, you must have the appropriate software

running on your PC. In simple applications, a terminal emulation program (like Microsoft

HyperTerminal) can be used to establish communication with the controller board. Make sure that your

communication software is set to the proper COM port and that its settings conform to the following:

9600 baud

8 data bits

No parity

1 stop bit

No handshaking

Once the hardware connection is established and the communication software is running, applying

power to the controller board will result in the following message being displayed on the PC’s

communication software:

ELM624 v3.0

If you do not see this message in the communication software when power is applied to the controller

board, check your connections and make sure that your communication software is set correctly

(correct COM port, correct serial settings, etc.) and that you are using the correct (straight –through)

cable for connecting to the adapter.

Using the adapter

There are a host of commands that are available to configure the board for operation. These commands

are all detailed in ELM Electronics’ data sheet on the ELM624 controller chip (which is the heart of our

controller board). This datasheet can be downloaded from:

http://www.elmelectronics.com

While you can customize these settings for your particular application, the default settings that are used

when power is applied to the controller board will give acceptable operation in many cases.

Sending LANC commands to the camera / camcorder

Once everything is configured and running, you are ready to start using the controller board for

controlling your LANC device. The following table of LANC commands represent some of the most

common commands that are available to control basic camera operation and/or recorder operation.

From the communication software on the PC, simply type in the 4 character code followed by the ENTER

key.

Function

Character Code

Zoom Out

2837

Zoom In

2835

Focus Auto/Manual Toggle

2841

Manual Focus Farther

2845

Obviously, this is not a comprehensive list of LANC commands. There are literally dozens of commands

that Sony has in the LANC protocol –other commands can be found by learning more about the details

of the LANC command structure available from other resources.

LANC data returned from the device

When a LANC command is sent to the LANC device, the controller board will begin sending response

codes from the LANC device to the PC. This comes in the form of 4 status bytes which are formatted

into eight hexadecimal characters. The first two characters represent status, the third character is used

to identify the meaning of the fifth through eighth characters. This is all defined in the ELM data sheet

and may be useful to you for development of custom software for monitoring your device.

To stop the flow of data from the controller board to the PC, simply type any character on the PC’s

keyboard while in the terminal emulation software.

Manual Focus Nearer

2847

Backlight

2851

Function

Character Code

Stop

1830

Rewind

1836

Fast Forward

1838

Play

1834

Rewind

183A

Reset Counter

188C

Pause

1832

Power Up from Sleep

185C

Appendix A : Instructions for Configuring HyperTerminal for ALE’s LANC Controller Board

1) Start HyperTerminal on a Windows XP-based PC.

2) On the first screen, enter a session name and choose the proper configuration icon:

3) On the next screen, choose the correct COM port number from the dropdown (in this example,

we have chosen COM1, but be sure to select the correct COM port that corresponds to the port

that you are using to connect to the LANC board. If you are unsure, check your system

hardware settings in Windows).

4) On the next screen, set the com port operating parameters as shown below (i.e. 9600 bits per

second, 8 data bits, no parity, 1 stop bit, no handshaking.

5) At this point, HyperTerminal is properly configured. When you apply power to the LANC board,

you will see the following sign on message in the HyperTerminal session window:

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