Daikin MICROTECH SMARTSOURCE 2300 WSHP, Руководство по интеграции, Страница: 5 / 30

NETWORK CONFIGURATION
ED 19129-1
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5
Network Configuration
Addressing Parameters
Table 2 describes the BACnet parameter settings required for
establishing network communication .
Table 2: Network Communication Parameter Settings
Parameter Default Range Notes
Baud Rate 38400
9600, 19200,
38400, 76800
Must be set to match
the speed of the BACnet
network . This must be done
from the BACnet module
configuration menu using a
terminal device application
such as HyperTerminal or
PuTTY
Max Masters 127 1 - 127
Set to the highest address
of a MS/TP master on the
network segment to reduce
the MS/TP token traffic and
increase response time of
the unit controller . This must
be done using a terminal
device application such as
HyperTerminal or PuTTY
MAC
Address
(AV:411)
N/A
0 - 127, and
255
Note that
128 - 254
are not valid
addresses
Must be set according
to the BACnet network
requirements . When the
dip switch address is set
to 255 (factory default),
the MAC Address is
dynamically acquired during
the commissioning process .
Once commissioned, the
MAC Address can be
adjusted from the network
using AV:411, or through a
terminal device application
such as HyperTerminal or
PuTTY
When the dip switch
address is not set to 255,
the static MAC Address
directly matches the dip
switch value
System
Minimum
Instance
(AV:412)
3101000 0 - 4194303
Writeable only through
the network . “Present
Value” is used during the
commissioning process
to determine the Device
Instance and Name
Device
Instance
Number
300
0 - 4194302
300 not
allowed
The commissioning process
initializes the Device
Instance Number to MAC
A System Minimum
Instance (AV:412) or is
manually adjustable
Device
Object Name
MT2300_
WSHP_
Ser2_0000300
or
MT2300_
WSHP_
SS2C_0000300
Up to a
31-character
Device
Object Name
The commissioning process
initializes the Device
Object Name to either
“MT2300_WSHP_Ser2_” or
“MT2300_WSHP_SS2C_” +
Device Instance
Max APDU
Length
480 N/A Fixed value = 480
As referenced above in Table 2 , certain addressing parameters
are accessed using the BACnet communication module’s built-
in configuration menu ( Figure 1 ) .
The BACnet configuration menu is accessed using a serial
application like Windows
®
HyperTerminal
®
or PuTTY . It is
assumed that the user is familiar with such an application .
Addressing must be done before the controller can
communicate to the network . Also refer to MicroTech WSHP
BACnet Communication Module, IM 928 for further addressing
information ( www .DaikinApplied .com ) .
Network Variables AV:412 and AV:411
During the automatic assignment process, AV:412 (the System
Minimum Instance number) is added to the MAC Address
value to determine the Device Instance Number . After the
communication module is commissioned, the MAC address is
commandable from the BAS using the AV:411 object .
AV:412 has an ObjectName of SystemMinInstance, the
Present Value is writable, and it has a default value of
3101000 . During the commissioning process, the present
value of AV:412 is added to the MAC Address to determine the
Device Instance Number .
In order to change the value of AV:412 on the communication
module in the unconfigured state, the BAS must broadcast
a new present value to AV:412 using the BACnet service
(BIBB – BACnet Interface Building Block) called “Unconfirmed
COV” with a ProcessID value of 1 . This prevents unauthorized
unconfirmed writes, or changes, to AV:412. Note that this
change affects the AV:412 present value for every WSHP
communication module on the trunk .
The following is an example of how AV:412 can be used in a
typical BACnet BAS:
A network has two separate trunks. One trunk uses the
default Minimum Instance Number of 3101000. The second
trunk is set to a different Minimum Device Instance Number
(Example 3102000) via AV:412. In this way, the two trunks
can each have unique Device Instance Numbers on the
network.
The AV:411 object is the MAC Address/Address Switch .
It is a multi-purpose variable, which means that the
ObjectName changes based on the value of the physical
S3 address switch on the communication module . When
the address switch is set to 255, the AV:411 Object Name
is MACAddress, the Present Value is commandable via the
BAS, and represents the communication module’s MS/TP
MAC Address . However, if the address switch is not set
to 255, the AV:411 Object Name is MACAddressSwitch,
Present Value is read-only, and represents the S3 physical
address switch setting .