22
GND
RTN
Data
Rxd
Txd
CTS
RTS
Figure 7-9 Screw Terminal Connection
7.5 Communications Module Configuration
Prior to using the MJ-X
L
Communications Module in the network, the communications module needs to be
configured properly for communications. The < COMMUNICATIONS > menu of the MJ-X
L
Control Panel
provides all the required communications configuration items for the communications module. Table 7-4 lists the
communications menu items in the order in which they appear on the MJ-X
L
Control Panel.
1.
Program the communications parameters of the MJ-X
L
Communications Module by pressing the Menu key
twice to display the < METER > menu.
2.
Then press the left arrow key until the < COMMUNICATIONS > menu appears. Use the up and down arrow
keys to access the individual menu items.
3.
To change the value of the parameter, press the Change key, and then use the scroll keys to toggle the choices
or set the value for the parameter. Press the Save key after changing the value of a menu item to enter the
changes, or press the Cancel Reset key to cancel the change.
Each time a configuration menu item is changed, the communications module is reset by the main MJ-X
L
Control
Panel. This reset is part of the process of updating the communications module with the new configuration.
Table 7-4 Communications Menu Items
Menu Item
Description
Selections
Data Stat = XXXXX
Data Port status
Not Applicable (This is a Status
Item)
DatPortBaud
Data Port baud (in bits/second)
300, 1200, 2400, 4800, 9600, 19200
Data Parity
Data Port parity
None, Even
Reg Id
Regulator Identification
0 - 32,766
Protocol
Communications Module protocol
DNP3.0, 2200, 2200NOA, MJ3A A,
MJ3A B1, MJ3A B2, 2179, 2179
MJ-X
L
, 2179 5A, SPECIAL
Comm Baud
Communications Module baud (transmission rate)
300, 1200, 2400, 4800, 9600, 19200
Comm Parity
Communications Module parity
None, Odd, Even
Comm Addr
Communications Module address
0 – 65,535
