Edwards LaserSense HSSD-2

Chapter 3: Programming the unit
LaserSense HSSD-2 Aspirating Smoke Detector Installers Handbook 53
Auto-learn scan devices
Yes/No - CM only: Setting this function to Yes causes the command module to
scan the RS-485 data bus for connected detectors. While scanning, the display
will show Scanning loop and display a progress bar. When finished, the display
will show the number of devices found and the detector addresses in the form.
The list “wraps around,” so that pressing Up Arrow when viewing Address 001
brings up detector number 127. Pressing Right Arrow allows the user to remove
a detector address from the loop (by changing “Y” to “N”), or to re-instate a
previously removed detector (by changing “N” to “Y”). This is different from the
Isolate function in that a fault is still generated on the command module.
However, this may need to be done if replacing a detector on the loop so that the
detector’s address becomes available to the replacement. After replacing the
detector, the address may be re-enabled.
Looped bus (class A) network wiring connection
Yes/No - CM only: This function is set to Yes to signify that the detectors are
connected to the command module in a fault tolerant loop configuration (See
“Fault-tolerant detector loop configuration” on page 32 for further setup
information.) Failing to set this value to Yes for a loop configuration will mean that
the fault monitoring advantages of the detector loop are lost. Setting the value to
Yes for a non-fault tolerant configuration will generate detector loop errors, so it
is important that the appropriate configuration is identified.
Poll timeout
30-255 - CM only: This is the time, specified in milliseconds, which a device has
to respond to a poll from the command module. If no response is received for this
time then, a Comms fault message is shown for this device on the command
module display. This may be caused by communications delays, e.g., when units
are communicating across a Wide Area Network. This function may then be set
to a more suitable value.
Note: If in doubt about the setting of this function, please contact Technical
Support.
Call centre
Numeric - CM only: This is the phone number the modem dials up to send a
message. For more detail on this and the other functions in the “Pager” sub-
menu, refer to Appendix A.
Password
Alpha - CM only: This is an optional password used to access the system.