BECKWITH ELECTRIC BlueJay M-2911 Manuel d'instructions - Page 5

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Configuring the M-2911

To configure the M-2911, the unit must be placed in the AT-Command Mode. Placing the M-2911 in the AT-

Command Mode is accomplished utilizing a terminal emulator such as Microsoft

Current versions of Microsoft Windows™ include HyperTerminal (a terminal emulation program designed for

modem communications between a PC and an Intelligent Electric Device (IED). The Hyper Terminal program

can generally be found under Start/Program Files/Accessories/Communications. To set up the Hyper

Terminal program to place the M-2911 in the AT-Command Mode, perform the following:

Start the Hyper Terminal program.

The program will display a prompt asking for a name and icon choice for the new connection.

Enter a name (such as M-2911), then select OK. The program will display the Connect To dialog

box.

From the Connect Using drop-down menu, select COM1 (or the COM port to which you will be

connecting), then select OK. The program will display a COM Properties dialog box.

Set the COM Port Settings as follows:

Bits per Second: 9600

Data Bits: 8

Parity: None

Stop Bits: 1

Flow Control: None

■ NOTE: The PC or laptop computer does not have to be connected to the M-2911 to open the COM port.

Select OK. The connection has been configured and opened.

To place the M-2911 in AT-Command Mode, perform the following:

Connect the M-2911 (using a straight-through RS-232 cable) to a PC or laptop computer running a

terminal emulator program (such as Microsoft HyperTerminal) set to 9600 bps, No Parity, One

Stop Bit.

Apply power to the M-2911. When prompted onscreen, type "+++". All three LEDs on the unit

should illuminate while in "Command Mode".

The M-2911 will enter AT-Command Mode and respond with "OK". The user can then enter AT

Commands by typing them into the terminal window and pressing Enter.

When the configuration of the M-2911 has been completed, then exit the configuration mode and

save any changes made by entering ATZ<ENTER>

AT Commands

Addressing (Unit Address, Destination Address, Multicast Address)

ATS=nnn

Unit (Source) Address

ATD=nnn

Destination Address

ATM=nnn

Multicast Address

The M-2911 BlueJay™ Wireless Data Transceivers are generally used in pairs, serving as a simple "wireless

extension" for a RS-232 (or RS-422 or RS-485) connected piece of equipment.

The most simple application is a pair of M-2911s inserted into a cable connection between one piece of

equipment (perhaps an RTU) and another (perhaps an IED). In this case, the units are configured with

corresponding addresses. For example, the first unit may be set to Unit Address 1, and the second to Unit

Address 2. Then the first unit would have Destination Address 2, while the second could have Destination

Address 1. So when the first unit transmits data, it "labels" it to be received by the M-2911 with Unit Address

2, while data transmissions from the second unit would be labeled for reception by the M-2911 with Unit

Address 1. In this way, they exchange data between the pair and no other M-2911 in the area.

M-2911 BlueJay Wireless Data Transceiver

–5–

HyperTerminal™.