SPYDER MODEL 5 ROOM CONTROLLERS
−
INSTALLATION GUIDE
31-00281ES-01 (EN1B-0664GE51 R0819)
10
Automatic MAC Addressing
In contrast to other controllers (e.g., WEB-8000 controllers,
whose MAC addresses must be assigned manually
–
done
using their two dip switches), the WEB-RxxN controller
features automatic MAC addressing.
The MAC addresses which the individual WEB-RxxN con-
trollers in the BACnet MS/TP channel assign to themselves
are not assigned in sequential order.
Rather, they assign those numbers (MAC Addr) in the range
of 1 to maxMaster currently not in use by another device in
the BACnet MS/TP channel (the MAC Addr of "0" is reserved
by default for the router / plant controller, itself).
All WEB-RxxN controllers are BACnet MS/TP masters.
Every master performs periodic polling for the possible
appearance of new masters. Each master "knows" the
identity of the "next" master (i.e., that WEB-RxxN controller
with the next-highest MAC Addr) on the BACnet MS/TP bus
and to which it must therefore pass the token. The polling
process includes a search for new masters which might
have MAC addresses lying between its own MAC address
and that of the "next" master.
The property maxMaster specifies the highest-allowable
address for master nodes. maxMaster is set to
32
by
default, thus guaranteeing that, on a BACnet MS/TP bus
with, e.g., 32 WEB-RxxN controllers, all of the other WEB-
RxxN controllers will be found. Both the property
maxMaster and the property MAC address are writeable
properties that can be changed.
NOTE:
You should not attempt to program a MAC Addr
outside the range of 1 to maxMaster.
#maxMaster
ANCILLARY WEBs MSTP CONTROLLER (WITH MANUAL MAC ADDRESSING)
WEB-RxxN CONTROLLER (WITH AUTOMATIC MAC ADDRESSING)
WEB-8000/
CIPer Model 50 etc
.
Fig. 12. Automatic MAC addressing
In the scenario depicted in Fig.15, some of the controllers
in the BACnet MS/TP channel do not feature automatic
MAC addressing; rather, their MAC addresses were
assigned manually (e.g., using their two dip switches). Thus,
when a new WEB-RxxN is added to the channel, when its
automatic MAC addressing function is triggered, it will
assign itself an available (i.e., unoccupied) MAC address.
During the automatic MAC addressing process, LED
behavior #7 (see Table 7) is displayed.
OPERATOR INTERFACES
LEDs
The controller features the following LEDs:
T2 R2 T1 R1
!
Fig. 113. Controller LEDs
Table 7. Description of LED behaviors
symbol
color
function, description
T2
yellow
Not used
R2
yellow
Not used
T1
yellow
LED indicating transmission of
communication signals via the BACnet
MS/TP interface.
R1
yellow
LED indicating reception of communication
signals via the BACnet MS/TP interface.
!
yellow
Status LED indicating firmware problems,
hardware problems, etc. (see Table 8).
green
Power LED indicating firmware problems,
hardware problems, etc. (see Table 8).
Table 8. Status LED and power LED behaviors
#
Mode
Power LED
(green)
Status LED
(yellow)
1 Power failure
Stays OFF
Stays OFF
2 Device error*
Stays ON
Stays ON
3 Firmware download ON/OFF (1 Hz)
ON/OFF (1 Hz)
4 No application
ON/OFF (0.5 Hz)
ON/OFF (0.25 Hz)
5 Broken sensor
ON/OFF (0.25 Hz) Stays ON
6 Short-circuiting
ON/OFF (0.5 Hz)
Stays ON
7 Auto-MAC
ON/OFF (1 Hz)
ON/OFF (0.5 Hz)
8 Unacknowledged
alarm
ON/OFF (2 Hz)
ON/OFF (2 Hz)
9 Normal operation
ON/OFF (0.5 Hz)
Stays OFF
*Please return the controller for repair. Contact Honeywell
WEBs Customer Care for assistance.
Service Button
The Service Button is used to trigger dedicated events.
It is important to distinguish different controller behaviors
which are elicited depending upon whether the Service
Button is pressed when the controller is powering up or
when it is in normal operation. See the following sub-
sections.
Pressing Service Button during Power-Up
During controller power-up, pressing the Service Button
until LED behavior #3 (see Table 8) is displayed will reset
the controller to its factory settings, which are as follows:
▪
The application is cleared from the controller.
▪
The MAC address will be set to 0xFF, meaning that the
controller will now search for a new mac address (Auto
MAC will be automatically triggered after controller
power-up).
