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May 9, 2002 SuperView 3000 User Manual 55
D
.....
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S
ERIAL
C
ONTROL OF
M
ULTIPLE
U
NITS
The Multi-Product Serial Driver (MPSD) is a protocol for controlling more than
one RGB Spectrum product through a single console. The maximum number of
MPSD supported products in a single chain is ten. An extra non-MPSD
supported device can be connected to the last MPSD device in the chain,
making the total controllable devices equal to eleven.
The Auxiliary serial communications port is used to implement daisy-chaining
of multiple systems. The Auxiliary port of an upstream device is connected to
the primary port of a downstream device (see Figure 13). When a device is not
selected, it passes all commands to its downstream port, and passes all
responses from its Auxiliary port back to the console.
FIGURE 13. Serial Control of Two SuperView Units
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MPSD COMMANDS
All MPSD commands are preceded with “:” and are buffered by each device
that receives them. The devices must be placed in MPSD mode with the
:assign command before any other MPSD commands can be issued.
If the console receives no response from the devices, or a wrong command is
issued, entering :assign usually brings the system back into
communication.
:assign - identifies all connected devices and enters
into MPSD mode
:assign
This command identifies all connected devices and places them in MPSD
mode. Each device has a unique ID number from 0 to 9. Device 0 is
automatically selected to communicate with the terminal console. The ID
number or device name is shown with the prompt sign so users can recognize