| base |
The base name of signal name. |
| extension |
The extension name of the signal name. |
| attribute |
The attribute name of the signal name. |
| object type |
This field is used when reading array data and can have the
following values:
| Value |
Description |
| 0 |
Analog array object |
| 1 |
Logical array object |
|
| field selector |
This field allows for selecting various data to be returned and
can have the following values:
| Bit Numbers |
Description |
| 7 (MS) |
Type and inhibit type |
| 6 |
Value |
| 5 |
Units/Logical Text |
| 4 |
MSD Address |
| 3 |
Name Text |
| 2 |
Alarm Status |
| 1 |
Descriptor Text |
| 0 (LS) |
Logical ON/OFF Text |
|
| array/list # |
This field is used it indicate which list number to
read when reading a list, or the data array number when
reading an array.
![[warning]](../Images/warnicon.png) |
This field must be set to zero for non-array data. |
|
| start |
This field is used when reading list data, array data,
raw I/O data or memory data. When reading list data, this field
specifies the starting list element (usually zero). When reading
array data, this field specifies the starting row in the array
(counting from one). When reading raw I/O data, this field specifies
a 16-bit I/O address. When reading memory address, this field
specifies the starting 16-bit segment address. |
| end |
This field is used when reading list data, array data,
raw I/O data or memory data. When reading list data, this field
specifies the last element (must be greater than "start").
When reading array data, this field specifies the starting column in
the array (counting from one; and is usually one). When reading raw
I/O data, this field specifies a 16-bit I/O address. When reading
memory address, this field specifies the second part of the starting
16-bit segment address. |
| msd |
This is the Master Signal Directory number for the
given signal name. This value is retrieved from the RTU when the optimize attribute is set and
whenever there is a version
number mismatch. |