Transmitter Serial Port (Com2); Receiver Serial Port (Com3); Remote Serial Port (Com0) - BMS DLC50 Installation & Operation Manual

1.1

Transmitter Serial Port (COM2)

The transmitter serial port COM2 is used to control the attached transmitter and monitor its status. The
serial port is setup in the configuration menu for the specific model of transmitter. The DLC50 will then
configure the serial port for the correct control format and data rate for the specified transmitter.
1.2

Receiver Serial Port (COM3)

Generally, the receiver will use serial port COM3. The receiver port is used to control the attached
receiver and monitor its status.The serial port is setup in the configuration menu for the specific model
of receiver. The DLC50 will then configure the serial port for the correct control format and data rate for
the specified receiver.
1.3

Remote Serial Port (COM0)

The Remote Serial Port (COM0) is a multifunction serial port that is accessible on both the rear panel
and the front panel. The specific function is user selectable via the menu system. The remote port is
disabled by default, but the following types of functions are supported: Remote Primary, Remote
Secondary, Remote Client Serial, Pass-thru (TX port), Pass-thru (RX port), and Programming. Each of
these modes is discussed below. Although the Remote Serial port is available on both the front panel
and the I/O connector on the rear panel, more permanent connections (such as remote client, remote
primary or remote secondary) should use the I/O connector on the rear panel. The front panel
connection is intended to be convenient and compact for occasional short-term connections (such as
TX pass-thru or RX pass-thru) during maintenance only.
The remote primary and remote secondary modes allow a second DLC50 (the secondary) to connect
to a DLC50 (the primary) that is installed in an aircraft. This allows the secondary DLC50 to act as a
secondary point of control for the microwave equipment. The secondary DLC50 mimics the primary
DLC50 providing identical displays and control of any attached transmitter and receiver. TAA-101
actuator control is reserved for the primary DLC only. On power-up, the secondary DLC50 will display
an initial "splash" screen, then a second "splash" screen will display "Remote Secondary Mode" "Press
any key to cancel". A 10 second countdown will display. If a key is pressed during the 10 seconds, the
remote port will be changed to disabled and the DLC50 will enter "normal" mode. If no key is pressed
within the countdown, the DLC50 will enter Remote Secondary Mode and begin communications with
the primary DLC50. To cancel remote secondary mode, select none in the config:remote port menu.
"Remote Client Serial" mode uses the DLC50 variant of the WDTSII remote control protocol to control
specific functions on the DLC50 and any connected transmitter or receiver through a single serial port.
Commands are directed to either the transmitter, receiver, or DLC50 by use of selective addressing.
Commands directed at the transmitter should use the address A5h. Commands directed to the receiver
should use A6h as the address. And commands directed specifically to the DLC should be addressed
to A4h. See separate DLC50 Remote Client Serial Protocol document.
"Pass-thru TX port" mode echoes data to and from the TX serial port. This allows an easy method for
direct connection from a PC to an attached transmitter without removing the DLC50 to access the rear
panel connections. The DLC50 TX port must first be properly configured for the correct transmitter
attached to the TX port. Baud rate and port settings are copied from the TX port settings. The second
line of the display will show "Pass-Thru TX port". While the DLC50 remote port is in pass-thru mode, all
other communications to the receiver and transmitter ports will be inhibited.
Pass-Thru RX port mode echoes data to and from the RX serial port (see Pass-thru TX port above.)
Baud rate and port settings are copied from the RX port settings. The middle line will display "Pass-
Thru RX port" on the second line of the display. While the DLC50 remote port is in pass-thru mode, all
other communications to the receiver and transmitter ports will be inhibited.
A programming mode is provided that uses the BMS update tool. The display shows a static warning
that the program is being updated.
The document reference is online, please check the correspondence between the online documentation and the printed version.
DLC50 Control Panel Installation and Operation Manual | Doc. No. 6051439500 Rev. A
Broadcast Microwave Services 4