...
Item count - number of elements in the case of an array of values, the number of elements being read.This number may be less than or equal to the actual size of the array in the device.If it is not specified, one element is read.Kotva item_count item_count
Fragmented read - an indicationthat the Read Tag Fragmented Service message should be used for reading because the entire array does not fit into a message with the length specified by the Max Packet Size parameter.
Note: If the reading using the Read Tag Service message returns an error code Partial Transfer [0x06], the next reads will use the Read Tag Fragmented Service message as if the Fragmented read indication was set.
By clicking the Browse button, a browse dialog can be opened, and a list of symbolic names can be retrieved as long as the communication with the device is established. For each Each symbolic name, its 's type is also read. In the case of structures or arrays of structures, the type is identified as "STRUCTURE (---)". D2000 cannot presently use such complex types - it is necessary to specify an the address of a particular item as a symbolic name (e.g. MyStruct.MyItem or MyArr [1] .MyItem).
The Auto option is used to set the NONE/AUTO attribute type (autodetect). If this option is off, the attribute type is copied to the I/O tag along with the symbolic name after double-clicking on a specific line in the list of symbolic names.
The Refresh button is used to repeatedly retrieve the list from the device. The KOM process caches a list of symbolic names, so the second and subsequent opening of the browse dialog is significantly faster than the first one during which the data is being read from the device.
Note: symbolic names beginning with the underscore are related to system objects of the Rockwell device, other names are user-defined.
| Kotva | ||||
|---|---|---|---|---|
|
...
Note: not all types of attributes from the offered list have reading/writing implemented. All numeric types, time types, strings (SHORT_STRING, STRING, STRING2), and numeric and time array types are supported. International The international string (STRINGI) type is supported for reading.
...
- Ver. 1.0 - November 28, 2018 - Creating of the document.
- Ver. 1.1 - January 2, 2019 - Improved browsing, and testing with 1769 with 1769 CompactLogix 5370 Controller
- Ver. 1.2 - September 6, 2021 - Support for encapsulated PCCC mode (read-only)
- Ver. 1.3 - December 21, 2021 - Support for reading items into the structure for PCCC mode
- Ver. 1.4 - January 4, 2021 - Support for writing in encapsulated PCCC mode
- Ver. 1.5 - May 30, 2023 - Support for Multiple Service Packet Service
- Ver. 1.6 - June 4, 2024 - Support for Connected Messages, Forward Open, Large Forward Open
...