18
IM 689-2
•
For a series-100 centrifugal chiller, the level-2 display processor does not have a BACnet point
map, but it still needs a valid L2 address. The BACnet point map is for the level-3 control
processor, which must always have an L3 address of 01. See example below in Figure 8.
As long as these rules are followed, a MicroTech controller’s network address can be set to any value.
Figure 8. Example of an Address Schedule
MicroTech Network No.:
100
PMF Version No.:
1.07
MicroTech
Addr.
Unit
Tag
Unit Type/Description
Compatible
IDENTs
Device
Instance
Location
00.00
BDG-1
BACdrop gateway
–
10000
Mechanical room
01.00
RTU-1
VAV rooftop
ART1E06B–D
10001
Office area
02.00
RTU-2
CAV rooftop
ART5E07A–D
10002
Gymnasium
03.00
CH-1
Centrifugal chiller (series-100,
display processor) —
No BACnet
point map available
–
–
–
03.01
CH-1
Centrifugal chiller (series-100,
control processor)
PC408I
10003
Mechanical room
04.00
10004
05.00
10005
06.00
10006
07.00
10007
08.00
10008
09.00
10009
0A.00
10010
0B.00
10011
About the Device Instance and MicroTech Network Number
The Device object instance and the MicroTech network numbers are BACnet codes used by the BAS
to identify individual MicroTech controllers—the BACnet equivalent of the MicroTech network
address. They must be unique throughout the entire BACnet BAS. The numbers are stored in the
BACdrop gateway’s configuration file.
Since the BAS will be using the Device instance and MicroTech network numbers, it is a good idea to
contact the BAS representative prior to configuring the BACdrop gateway to find out whether they
have any special requirements for these numbers. If they do, their preferred numbers can be recorded
in the schedule. If they do not, the Setup Wizard’s default numbers can be recorded in the schedule
and given to the BAS representative. (As shown in Figure 8, the default MicroTech network number
is 100, and the default Device object instances start at 10000 and continue consecutively to 10063.)
Either way, these numbers must be entered into the BACdrop gateway when it is configured. If the
default numbers are used, data entry will be reduced since the Setup Wizard automatically generates
the numbers.
About the Location
The Location column provides a place to list an optional location label that can later be entered into
the BACdrop gateway during configuration. If this is done, the label will be available to the BAS as
the Location property for each BACnet Device object.
About the PMF Version and Compatible IDENTs
An IDENT is the software ID code for MicroTech controller software. The PMF maps specific
memory locations that are defined in the MicroTech controller software and thus it is essential that
compatibility be maintained between the PMF and IDENT versions. The various BDIP documents
provide this compatibility information.
It is highly recommended that the McQuay representative enter the PMF version and its compatible
IDENTs into the schedule in advance so that the actual controller IDENTs (read out of each
controller’s memory) can be checked against these during the commissioning process. Use the BDIP
