Other Radio Device Addressing; Other Devices Connected To The Control Unit; Bus Scanning And Re-Configuring - Eaton i-on series Engineering Manual

The System Bus

Other Radio Device Addressing

For radio keypads, radio sirens and WAMs, during the learning process the installer
selects a specific radio expander to learn the identity of the radio device. This means that
when programming these devices the control unit refers to them by a number containing
three groups of characters (similar to the characters the system uses to refer to zones and
outputs):
The first two groups are the address of the bus device (see page 23). The "R"
Rn-dd
indicate that the device is a radio expander.
zz = The last group is the radio device number.
Radio Device Numbering
When reporting alarms to an ARC using CID or SIA protocols the control unit reports each
device as a number (not as an address). Each type of device has its own numbering
range:
Radio Siren
WAMs
Note that the highest number will depend on the control unit.

Other Devices Connected to the Control Unit

Other devices connected directly to the control unit use a simpler addressing scheme:
Sirens/Strobe
Loudspeakers
Plug-by Outputs

Bus Scanning and Re-configuring

The control unit keeps an internal list of every bus device that it has learned. In order to
keep the list up to date the control unit carries out two functions: bus scan and bus re-
configure.
During a bus scan the control unit asks every device on the bus to report its bus address.
The control unit compares the addresses reported with the addresses that it has stored in
its list. If a device has a default bus address the control unit ignores it.
Bus scanning takes place during power up and when the installer leaves the Installer
Menu.
If the devices reporting to the control unit do not match the stored list of devices, then the
control unit offers to re-configure the bus. If there are additional devices on the bus then
the control unit will add those to the list of devices that it knows about. If there are fewer
items on the bus than on the list, then the control unit will remove those missing devices
from its list.
The control unit re-configures the bus while it is still in the Installer Menu. When the control
unit leaves Installer Menu it stores the changed bus device list in non-volatile memory
(nvm).
This has the following implications:
 Carrying out a bus scan does not change the bus configuration. Note that on large
systems a bus scan may take some minutes.
Page 26
Ext.01 to Ext.20
WAM01 to WAM20
"Siren" and "Strobe"
01 and 02 (01 only for i-on30EX and i-on50EX)
01 to 16 (1 to 12 for i-on30EX and i-on40).
Rn-dd-zz
i-on Range