RISCO Group LightSYS 2 - Manual (Page 192)

Installer Programming
Page 192
Quick Keys Parameter Default Range
 To perform BUS test
Through the menu selection

, the bus testing begins to
check the connections between the devices on the bus, and the
following display appears briefly:
BUS TEST:
>--XXXXXX--<
The system then displays the programmed device, its address, and the
quality of the communication, expressed as a percentage, as shown in
the following examples:
BUS COM QUALITY:
VOICE:01 =100%

BUS COM QUALITY:
LCDPI:01 =99%

A result of less than 100% means that there are bus connection
problems (for example, bad wiring or cabling located in a harsh
electrical environment or two modules in the same family have been
given the same ID number)

Bus Scan
The Bus Scanning menu scans the bus and reports all modules found
 To verify the bus  expander connections
1. Through the menu selection, the bus scanning begins, and the
following display appears briefly:
BUS SCANNING:
XXXXXXXXXXXX
2. Scroll down the list of accessory devices to ascertain that all
keypads and expansion modules in the installation have been
detected by the scan, as shown in the following examples:
BUS SCANNING:
TYP=WM ID=01

BUS SCANNING:
TYP=LCPDI ID=01

BUS SCANNING:
TYP=VOICE ID=01

The system displays each programmed device and its address