19
The top line of the screen shows the serial number of the panel.
Name
This is a label for the panel, useful when working with LMCS in
a situation where multiple panels are used, to help more easily
distinguish between the panels. Any numerals or letters can be
used in naming the panel. By default, the name is the same as
the serial number. Highlight the value and press Select to open a
new screen, as shown above.
Select
ERASE
if you want to clear all characters before entering
a new name. If you have several bridges or panels with a similar
name, for example Room 101 and Room 102, you can
COPY
the name and then
PASTE
it when you configure the next
bridge or panel. Select
DONE
to return to the
Network Settings
screen.
Device ID
The device ID is a unique number, between 0 and 4194302,
that identifies a device in a BACnet network. Every device in the
network must have a different number. By default, it is set to the
last six digits of the serial number, but can be changed if needed,
for example, when required by an integrator, as part of a BAS. To
change, highlight the value and press Select.
AutoSet MSTP MAC
The MS/TP MAC address is an additional identifier, used by the
devices on the network to communicate with each other. It is a
number between 0 and 127. It is important to understand the
difference between the device ID and the MS/TP MAC Address.
The Device ID is, in essence, a number that identifies “who” the
devices is, while the MS/TP MAC address identifies its relative
location in the group of BACnet devices.
In a BACnet network, all the devices pass a token to each other
to determine which device has control of communication over
the network. The MS/TP MAC address is used to “locate” other
devices. When a device receives the token, it will take control
of the communication and send messages to other devices as
needed. It then passes the token to the device with the
next
highest
MS/TP MAC address. In order to do this, it sends an “Are
you there?” message on the MAC address one higher than its own.
If it receives a response, it passes the token. If it does not receive
a response, it tries again on the next highest number, continuing
in this manner until it receives a response. This “Are you there?”
message is referred to as a Poll For Master.
NOTE:
In order to send and respond to this Poll For Master
message, a device must be designated as a master
device. Other devices (slave devices) on the network
will not respond, and cannot take control of the
communication.
While the Device ID is fixed and should not change, the
MS/TP MAC address can change as devices come on or drop
off the network. By default, with
AutoSet MSTP MAC
set to
“Yes”, the panel or bridge will automatically assign an MS/TP
MAC address, shown in the
Auto MSTP MAC
parameter. When
the panel or bridge is powered up, it will check the network for
other devices to determine if its current MAC address is being
used by another device. If, not it will keep the same address, but
if it is, and will assign an unused number between 32 and 127.
If you change
AutoSet MSTP MAC
to “No”, the parameter
below changes to you
Manual MSTP MAC
and you can
manually assign an MS/TP MAC address instead of having the
panel or bridge automatically assign the number. This can be
useful, especially in larger networks where response time is
important. Since the Poll For Master message checks the next
highest address number and then increments that number until it
finds a device, having devices with gaps between numbers can
increase latency. If you have 10 devices, numbered 0–9, you will
have optimal performance since no time is wasted sending the
Poll For Master message to an unused number.
Baud Rate
The default rate is 38400, but can be changed.
Max Master
This is another parameter that will cut down on latency. The
value you set for this parameter is the highest number the LMCP
will check when sending a Poll For Master message, before
returning to 0.
So, in the previous example, where there are 10 devices
numbered 0–9, if you set the Max Master to 9, it will never check
addresses 10–127.
NOTE:
You should be aware that devices connected over the
DLM Local Network also have MAC addresses for
communication purposes, but that MAC address is
entirely separate from the MS/TP MAC address.
If you make any changes, highlight
SEND
and press Select. Once
again, point the LMCT-100-2 at an infrared sensor and press
Select. You return to the
Global Network
screen. Or, if you aren’t
making any changes, highlight
DONE
and press Select to return.
Network Status
N e t w o r k S t a t u s
DONE
L M
0 6 0 3 9 8 1 2 1 0
N e t S t a t u s :
U n h e a l t h y
N e t D e v i c e C o u n t :
< 0 >
The Network Status shows the communication “health” of the
network and the number of devices currently found on the network.
Network Status
This will display as “Unhealthy” if it can’t find the BACnet
network, or if devices on network drop off and then reappear
while the panel or bridge is polling the network (indicating
connection problems). If devices show up consistently, or if they
disappear and do not show up again (which would indicate the
device was disabled or disconnected), the status will display as
“Healthy”.
Net Device Count
This displays the number of devices on the BACnet network.
UTILITIES
A d j u s t L i g h t L e v e l
G l o b a l N e t w o r k
U t i l i t i e s
P a n e l S e t u p
G r o u p S e t u p
M o r e
=
B AT
Utilities provides access to several advanced features of DLM.
• The Smartwire process allows binding buttons and sensors
to relays in a lighting control panel.
• Identify Devices is a means to extract service information
from room devices.
• Forcing PnG restores the room to its original plug and go
state.
• Room Mode allows the room to be forced into the after
hours or normal hours mode for testing.
• Load Shed allows you to customize how loads respond to a
Load Shed command via BACnet.
• Status provides several options for viewing the status of
different devices in the DLM network