78
ICC
Database Addr
This field defines the database address where the first parameter of this service
object will be mapped. Enter a value between 0 and 4094. Note that the
configuration utility will not allow entry of a starting database address that will
cause the service object to run past the end of the database. The highest valid
database address, therefore, depends on the number of parameters to be
accessed.
Multiplier
This field is the amount that associated network values are scaled by prior to
being stored into the database or after being retrieved from the database. Upon
retrieval from the database, raw data is multiplied by the multiplier to produce a
network value (to be sent to the device). Similarly, network values (read from the
device) are divided by the multiplier before being stored into the database.
Note that the multiplier imposes range limitations on network data values. For
example, if the multiplier is 0.01, then the network data can achieve a maximum
value of only 655 (since 65535 is the maximum value that can be stored in 16 bits
in the database).
Read Enable
Check
Read
to enable reading (the service object will continuously read from the
device unless a pending
Write
exists).
Write Enable
Check
Write
to enable writing (when values encompassed by this service object
change in the gateway’s database, these changes will be written down to the
targeted device).
Service Object Status
If it is desired to reflect the status of this service object, check the
Reflect Status
checkbox and enter a database
address
between 0 and 4080 (0x0 – 0xFF0) at
which to store the status information. For more information on reflecting the
status of service objects, refer to section 8.5.2.
8.8.2.3
Configuration Example
This example will configure the gateway for end-to-end communication using
PDNP master and BACnet/IP server.
Say, for instance, we wish to communicate to an A.O. Smith boiler from a building
automation system (BAS) that uses BACnet/IP. We wish to monitor the inlet
temperature, outlet temperature, and tank temperature on the boiler, located at
parameters 0, 1, and 2 respectively. We also wish to control the operating
setpoint of the boiler located at parameter 3.
Configure the Ethernet port using the above requirements
•
Connect the gateway to the PC via a USB mini type-B cable.
