Crestron
e-Schedule
Programmer’s
Guide
Since the CN-TVAV in Classroom 1 does not support Cresnet peripherals,
the local touchpanel and CNECI-4 must be wired directly to the Cresnet
network and bridged to Ethernet by the head end control system. Thus the
control signals for this hardware must also be routed through ISC symbols.
InterSystem Communications Symbol
An ISC, or InterSystem Communications symbol is used to pass digital,
analog and serial signals between control systems. An ISC symbol is
programmed identically to an ActiveCNX Interface and its definitions are
determined by whether it is a 1) Source or 2) Destination.
CEN-TVAV
The CEN-TVAV units that control Classrooms 2 and 3 of the sample system
are loaded with the same program, since they both have the same
configuration. Here a “Destination” ActiveCNX Interface and a “Source”
ActiveCNX Interface (for the local VCR source) will be programmed into
the CEN-TVAV. The touchpanel and CNECI-4 will communicate with the
CEN-TVAV through Cresnet, as usual, and the MRHC transmitter will
control settings for Power, Mute, Volume, Source Control and View
Channel.
Points to Remember
•
All components of an e-Schedule system—the Web Server,
Real-Time Engine, CNX Gateway(s), and Crestron control
systems—must have static IP addresses.
•
e-Schedule defines three ActiveCNX Interfaces, each with
different signals for 1) Sources 2) Switchers and 3) Destinations.
•
An ActiveCNX Interface is considered an Ethernet "device," and
therefore gets an IP ID and an entry in the IP Table, which must
reference the IP Address of the CNX Gateway.
•
An Ethernet enabled control system must serve as a bridge from
any non-Ethernet Cresnet-based hardware to the Ethernet
network. The programming is as follows:
1. In the bridge control system, include a “Destination”
ActiveCNX Interface for the non-Ethernet controller,
and a “Source” Active CNX Interface for each local
source (if any).
2. Use InterSystem Communication symbols to pass
signals back and forth from the bridge to the non-
Ethernet hardware.
•
An ISC is programmed identically to an ActiveCNX Interface.
•
Avoid tiered switching, i.e., any environment where resource
allocation problems may arise.
Programmer’s Guide
e-Schedule – DOC. 5919
•
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