73
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 (capturing the values of parameters from a
broadcast). All read-enabled service objects will be used to compare block and
parameter numbers for each master broadcast.
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 to the master on
the next poll request).
8.8.1.3
Configuration Example
This example will configure the gateway for end-to-end communication using AIN
slave and BACnet/IP server.
Say, for instance, we wish to communicate to an A.O. Smith water heater from a
building automation system (BAS) that uses BACnet/IP. We wish to monitor the
primary temperature, secondary temperature, and controlling temperature on the
water heater, located in block 0 at parameters 2, 3, and 5, respectively. To
control setpoints on the water heater, we can map the setpoint temperature and
setpoint differential located in block 0 at parameters 6 and 7, respectively.
Configure the Ethernet port using the above requirements
•
Connect the gateway to the PC via a USB mini type-B cable.
•
Open the configuration utility and select the ETH-1000 (see section 8.1 for
more information on selecting a device).
•
Click on the
Ethernet Configuration
subtab.
