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M-2911 BlueJay Wireless Data Transceiver
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
®
HyperTerminal™.
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:
1.
Start the Hyper Terminal program.
2.
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.
3.
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.
4.
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.
5.
Select
OK
. The connection has been configured and opened.
To place the M-2911 in AT-Command Mode, perform the following:
1.
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.
2.
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.
3.
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.
