4. Device Concept
UMX-HDMI-140 series– User's Manual
27
Applied firmware package: v1.2.0 | LDC software: v2.4.1b7
4.5. Control Features
4.5.1.
Serial Interface
Technical Background
Serial data communication can be established via the local RS-232 port (Phoenix connector). Three different
RS-232 modes can be set for the serial port: Control mode, Command Injection mode, or Event Manager
mode; see the figure below.
Block diagram of the UMX-HDMI-140 serial interface
The following settings are defined:
1
The serial port is in
Control mode
.
2
The serial port is in
Command Injection
mode
.
3
The serial port is in
Event Manager mode
.
INFO:
All settings are available in the LDC software, see details in the
section.
Only one mode can be used at a time: Control mode, Command Injection mode or Event Manager mode.
Control Mode
The incoming data from the given port is processed and interpreted by the CPU. The mode allows to control
the receiver directly. LW2 or LW3 protocol commands are accepted – depending on the current port setting.
Command Injection Mode
In this mode, the device works as a TCP/IP <-> RS-232 bidirectional converter. The TCP/IP data is converted
to RS-232 data and vice versa. For this operation separated TCP/IP port number is defined (independent of
the basic ones which are used for device control over TCP/IP).
Event Manager Mode
Third-party devices can be controlled from Event Manager in this mode. ASCII characters and binary data in
hexadecimal format can be used in this case.
RS-232 Control – Example
The following ways are available for controlling the devices:
▪
The
System controller
sends messages over the LAN port of the
Switcher
to the given port number. The
Switcher converts the incoming TCP messages to RS-232 commands and transmits over the local
RS-232 port to the
HDTV
. The local RS-232 port has to be set to
Command Injection mode
. In this case
the direction of the communication is bi-directional between the Switcher and the System controller,
so the answer of the HDTV is received by the System controller.
▪
The
Switcher
sends a "power on" message to the
HDTV
via the RS-232 port if signal is received on the
DVI-D input. In this case the RS-232 port has to be set to
Event Manager mode
and an event has to be
created where the condition is "signal is received on I4" and the action is "send a message on RS-232
port". Find a detailed example for the serial message sending in the
section.
