ICC ETH-1000, Инструкция по эксплуатации, Страница: 51 / 281

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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
Note that the multiplier, coupled with the data type, imposes range
limitations on the network data value. For example, if the data type is 8-
bit and the multiplier is 0.5, then the network data can have values only
up to 127 (since 255 is the maximum value that can be stored in 8 bits).
Element Data Type
This field specifies the size of each Tag element in this service object,
as well as whether the value should be treated as signed or unsigned
when converted from the
Element Data Type to the DB Data Type .
Select the desired data type from this dropdown menu. It is strongly
recommended to match the
Element Data Type with the DB Data
Type.
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.
Num Elements
This field specifies the number of 16-bit elements to be accessed by this
service object. Enter a value between 1 and 120 (0x1 – 0x78).
Offset
This field specifies the offset from the File Num .
File Num
This field specifies the file number on the target device. Enter a value
between 0 and 65535 (0x0 – 0xFFFF).
The following fields apply to Produced Tag Message Types only
Produced Tag
This field specifies the produced tag name on the target device. Enter a
string from 1 to 32 characters in length (note that tag names cannot
contain spaces).
Con Start Addr (“Consumed Data Start Address”)
This field specifies the database address that the first consumed byte of
data is mapped to. Input data received from the server device will be
stored in the gateway’s database starting at this address. Enter a value
between 0 and 4095 (0x0 – 0xFFF).