91
ICC
Data Type
Applies to analog objects only.
This field specifies how many bytes are allocated
for the present value data, as well as whether the value should be treated as
signed or unsigned when converting it to a real number to send over the network.
Select the desired data type from this dropdown menu.
Note that each data type has its own range limitations: 8-bit data types can have
values up to 255, 16-bit data types can have values up to 65,535, and 32-bit data
types can have values up to 4,294,967,295.
Relinquish Def
This field is the default value to be used for an object’s present value property
when all command priority values in the object’s priority array are NULL. Note
that this property only exists for those objects that implement a priority array
(analog output, analog value, binary output and binary value objects).
8.8.4.4
Configuration Example
This example will configure the gateway for end-to-end communication using
BACnet MS/TP Server and EtherNet/IP Server.
Say, for instance, we wish to share data between two PLC’s. One PLC only
supports BACnet, while the other only supports EtherNet/IP. Let’s assume that
the BACnet PLC exchanges information from different floors of a building. There
are 3 floors; floor 1 has 3 analog values at instances 1000, 1001, and 1002 for
monitoring the floor status and 3 analog values at instances 1003, 1004, and
1005 for executing commands on the floor. Similarly, floors 2 and 3 have the
same analog values for monitoring and commanding starting at instance 2000 for
floor 2, and starting at instance 3000 for floor 3.
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.
•
Click
Use a static IP address
and enter the IP address settings that your
PLC is configured to communicate with.
•
Check the checkbox next to
EtherNet/IP
Server
in the
Protocol
dropdown
menu, and then click on the
EtherNet/IP Server
subtab.
•
Enter “0” into the
Produced Data Start Address
field.
•
Enter “100” into the
Consumed Data Start Address
field.
Configure the RS-485 port using the above requirements
•
Click on the
RS-485 Configuration
tab.
•
Select
BACnet MS/TP Server
from the protocol dropdown menu.
•
Enter the
Baud Rate
settings to match that of the PLC.
•
Enter the
Address
at which the gateway will reside on the network.
•
Enter a
Device Name,
device
Instance Number
, and the
Max Master
for
the gateway.
