Filter
Top Products
49
CVHE-SVU01E-EN
Interprocessor
Communication
Inter Processor
Communications IPC3
When using Tracer CH530, you will
not be required to know all the
details about the structure of the IPC3
bus. However this page gives
detailed information about the
system for those of you that are really
interested in how it works. The IPC3
protocol is based on RS485 signal
technology. IPC3 was designed to be
very efficient. It communicates at 19.2
Kbaud. This data rate will allow for
three rounds of data per second on a
64 device network. A typical CVHE
control network will have less than
50 devices. IPC3 allows for a
maximum of 255 devices per
network.
IPC3 Definitions:
Bus Management:
The DynaView
™
provides the bus
management having the task of
restarting the link, or filling in for
missing nodes when the normal
communication has been degraded.
This involves reassigning node
addresses and filling in for nodes
that are off-line. The DynaView
™
always has a node number of 01.
Node Assignment:
When a unit is factory
commissioned, the LLIDS must have
their node addresses assigned to
them for storage in non-volatile
memory. The node addresses are
normally assigned sequentially
during factory commissioning.
Node Zero:
Node number zero is is a special
node assignment that is reserved for
devices that are service selected. A
LLID communicating on node
address zero will also communicate
on an assigned node address. A LLID
will only communicate on node
address zero if it is service selected.
Binding:
Binding is the process of assigning a
node number and functional IDs to a
LLID. Binding is a simple process:
1. Service selecting the LLID with a
magnet.
2. Assigning functional IDs to that
LLID with TechView
™
.
Functional Identification:
When each LLID on the bus is bound,
its inputs and outputs are given a
functional ID. The Frame LLIDS have
only one functional ID, but most
Panel LLIDs have more than one
functional ID. A dual high voltage
binary input will have two functional
IDs, a quad relay output has four
functional IDs.
The DynaView
™
Main Processor with
its IPC3 Bus communicates to the
control panel devices, unit mounted
devices, and any remote devices on
the IPC3 bus network. The various
devices are discussed in the
upcoming sections.