ICC ETH-1000, Инструкция по эксплуатации, Страница: 39 / 281

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ICC
Description
This field is a description of the service object. It is not used on the gateway, but
serves as a reference for the user. Enter a string of between 1 and 18 characters
in length.
Dest Dev Inst (“Destination Device Instance”)
This field is the destination device instance of the BACnet device the gateway
should send requests to for this service object. Enter a value between 0 and
4194302 (0x0 – 0x3FFFFE). Up to 32 unique destination device instances can be
specified.
Start Inst
This field is the starting instance number for a range of BACnet objects for this
service object. Enter a value between 0 and 4194302 (0x0 – 0x3FFFFE).
Num Insts
This field is the number of BACnet objects in this service object. Enter a value of
1 or more.
Database Addr
This field is the database address where the first BACnet object of this service
object will be mapped. Enter a value between 0 and 4095 (0x0 – 0xFFF).
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, will depend on the targeted data
type, as well as the number of items to be accessed.
Data Type
Applies to analog objects only. This field specifies how many bytes are used to
store present value data for each BACnet object in this service object, as well as
whether the value should be treated as signed or unsigned when converted to a
real number for transmission over the network. Select the desired data type from
this dropdown menu.
Note that each data type has its own range limitations: 8-bit can have values up
to 255, 16-bit can have values up to 65,535, and 32-bit can have values up to
4,294,967,295.
Multiplier
Applies to analog objects only. 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, the data is
multiplied by the multiplier to produce a network value. Similarly, the network
values are divided by the multiplier before being stored into the database.