Grass Valley NVISION Compact CQX - Manual (Page 101)

Compact Router System Configurator • User’s Guide 89
12. Tutorials
Products
The machine control routers support serial communication up to 1 Mb/s.
Background Information
A device can be considered a “controlled” device or a “controlling” device.
Above, the source device is a controlling device. A destination can also be the controlling device:
A controlling device sends commands to a controlled device. The controlled device passes
responses (such as status) back to the controlling device. A source device can be a controlling
device or a controlled device. A destination device can be a controlling device or a controlled
device.
Some external devices must be placed in “remote” mode to work with a port router.
A controlling port is one connected to a controlling device.
A controlled port is one connected to a controlled device.
The compact machine control routers operate in “data reverse” mode. This means that in any con-
nection, the destination device is the controlling device by default. The default can be overridden
by port type.
The 5 port types are variations of “controlled” or “controlling”:
Controlling or Controlled
These port settings fix the direction of the router port to “controlling” or “controlled.” The port’s
connection for Tx and Rx
— made during configuration — is static and does not change during
operation.
Dynamic
A dynamic port can be a controlling or controlled port depending on whether it is connected to a
master port or slave port. The port’s configuration is dynamic and can change during operation.
Dynamic ports are typically assigned to VTRs.
Master or Slave
Any dynamic port connected to a “master” port will be changed to a controlled port. A “slave” port
is the opposite of a “master” port: any dynamic port connected to a slave port will be changed to a
controlling port.
SRC DST
Compact Router Controlling device Controlled device
SRC DST
Compact Router Controlled device Controlling device
Controlling Master Dynamic
Controlled Slave