Hall Research VSM-I-A-16-16 - Manual (Page 34)

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Hall Research Technologies, Inc.
Primary
RS-232 Control
IP or Secondary
RS-232 Control
Processor
Out 1
Ou t 2
Out 3
Out 16
UART
Out Buffer
In Buffer
Response:
if “5” was entered (schedule off).
Schedule setting is OFF.
Response:
if “ESC” was entered (Quit).
Quit schedule setting.
3.2.13 Routing RS-232 Communication through the Matrix
The Matrices with the -JR Option are capable of sending serial commands to each
of the outputs.
3.2.13.1 Basics of Serial Communication with the Outputs
The Matrices with the -JR Option are capable of sending serial commands to each
of the outputs.
Figure 17 – RS-232 Communication Methodology
The block diagram above depicts the way a user can communicate serially with a
remote devices connected to the matrix’s outputs. Matrix units with JR output
option can send video and serial through the same RJ45 output connector. A
compatible receiver must be used at the remote end (such as UR-232 for transmit
only).
Referring to the above diagram, two control ports are shown on the left. The user
communicates with the matrix’s internal processor through either of these ports.
As seen on the right side of the block-diagram, the matrix must first establish
UART (RS-232 engine) connection to one of the matrix’s output ports. There is a
specific command for doing this which makes the connection and also clears both
the input and output buffers of the internal UART.
Once the UART is pointed to the desired output, then any data received from the
remote device (1~16), is stored in the “IN BUFFER”. There is a command to read
this buffer. Upon receiving this command the matrix will send the entire contents
of the input buffer to the user and erase the buffer.