Rs-232 Control; Rs-232 Cable; Rs-232 Port Settings - JFW 50MS-192 Operating Manual

8 - RS-232 Control

This unit is RS-232 controlled via a standard 9-Pin D connector on the rear of the unit. Before
operating the unit in remote mode make sure your RS-232 port is configured as described in "RS-
232 Port Settings" section of this manual. When in RS-232 mode, the 50MS-192 has five basic
functions. Please refer to the Command Set section of this manual for the commands and command
formats. The command format is the same for either RS-232 or Ethernet control. If commands are
sent incorrectly to the unit, you will receive an error message. See the "Error Code List" portion of
this manual for more details.
The baud rate is fixed at 38400.
The slide switch on the back panel allows the user to select between either RS-232 or Ethernet
control. The unit must be turned off and then back on, when changing between Ethernet and RS-
232 control for the change to take affect.

9 - RS-232 Cable

Included with the system should be one "Null Modem" cable (JFW part #012-174). This cable is
used to interface with the RS-232 Port and to configure the Ethernet connection. This cable is DE-
9P to DE-9S and is the "Null Modem" type. The female connector will plug into the serial port on
most PC's, and the male connector will connect to 50MS-192. This cable can also be bought from
L-Com (L-Com #CSNULL9MF-10)

10 - RS-232 Port Settings

When sending commands to the 50MS-192, your computer's RS-232 port settings must be
configured as follows. The baud rate must be set at 38400. The parity must be set to "none". The
data length must be set to "8" data bits. The stop bit must be set to "1". If your RS-232 port is not
configured with these settings, the 50MS-192 will not receive and execute the commands sent. It
will not send back an error either, because communication was never established.
Rev 0, 7-27-06
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