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5
Rs232c Serial communication protocol
Connection
The switcher can be connected to a PC, Mac, Crestron and AMX system by the 2 lines
of serial communication Rs232c. The transmission system is selectable between
9600,N,8,1 – 19200,N,8,1 and 38400,N,8,1. Only the TX or RX lines can be used. The
following pictures show the connections that must be realized on the D9-D9 and D25-
D9 cables for a PC. The connection cables for Mac, Crestron and AMX are described
on the user manual of each system.
Every serial comunication line is not depedent on the operative status of the switcher.
Both lines RS232c-1 and RS232c-2 have a deep buffer of 4096 bytes.
Instructions (values in hexadecimal)
01(Video) 02(Audio) 03(Video and Audio) – Switching source on destination
If the level L matches with the level of the module on which the switching is wanted,
the cross point <source> on <destination> will be obtained with this instruction. If the
switcher accepts the command an array identical to the one sent will be generated.
Give the value 1Fh to the source if a blank on a destination is needed.
31(Video) 32(Audio) 33(Video and Audio) Sending cross point data without switch
With this instruction it is possible to send a cross point data without having to
electronically execute the switching.
This allows to store the global data of the switcher with 16 type 3 instructions and
afterwards to assign a global switching command with a type 4 instruction.
The switcher will not show an answer once the command has been accepted.
4F(for all the levels) - Sending the command of global switching
With this instruction the MS8 switches at once the 8 cross points stored after the
sending of the data with instruction 3. The switcher will not show an answer once the
command has been accepted.
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General