Interface; Control Mode; Rs-232 Interface - Lightware HDMI-TPS-TX210 User Manual

5.5. RS-232 interface

The RS-232 interface supports three modes: Pass-through mode, Control mode and
Command injection mode. The RS-232 mode can be set by protocol commands or via the
Lightware Device Controller, see the section
Local and link lines
The transmitters have two lines for RS-232 serial communication:
Both lines are connected to the microcontroller, so these can be configured separately (e.g.
the baud rate can be different; the microcontroller does the conversion automatically
between the two ports).

5.5.1. Control mode

In Control mode the transmitter's CPU can receive commands and send responses to/from
its own serial port or to/from the serial port on the receiver through the CATx (TPS) cable.
The incoming data from both sides is processed and interpreted as LW2 or LW3 protocol
commands. Selecting the control protocol (LW2 or LW3) on the RS-232 interface can be
done either by using Lightware Device Controller or sending LW2/LW3 protocol
commands. The interface can be set for the Local and for the Link RS-232 line
independently from each other.
Example
The transmitter is connected to a receiver. A touch panel is connected to the RS-232 port
of the receiver and it sends commands to the transmitter; this is called ROT v2 (RS-232
over TPS). ROT only supports a few commands, which answer length is less than 50 Bytes.
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
Local: serial line between the CPU and the Phoenix connector,

Link: serial line between the CPU and the TPS interface.
Figure 5-5. Local and link serial lines
6.8.1 on page 50.
Figure 5-6. Control mode
Section 5. Front panel operations