Columns

The data fields shown in
FactoryTalk Live Data Test Client
 are organized into columns that provide this information.
Column
Description
Item ID
The name of the data item, as it appears in the data server.
Current Value
The last value of the data item that was received either from a subscription update or a manual update. The manual value is read synchronously or asynchronously.
Current Quality
Information about the value of the data item.
  • If the network connection is down, quality is displayed as
    Not Connected
  • If users are downloading the program, quality is displayed as
    Out Of Service
  • If users set the access right of a tag to
    NONE
    in
    RSLogix 5000
    , the tag’s quality is displayed as
    Out Of Service
  • If users delete the
    NONE
    tag, the tag’s quality is displayed as
    Configuration error (None Tag Delete)
Current TimeStamp
The time the value last changed in
FactoryTalk Live Data Test Client
.
Sync Value
The last value received via a synchronous read.
Async Value
The last value received via an asynchronous read.
Sub Value
Whenever data items are added to a group and made active,
FactoryTalk Live Data Test Client
 automatically subscribes to the data item at the data server, and receives updated values automatically as they change at the data server. This is referred to as a subscription value, and is shown in the
Sub Value
 column. Changes are displayed at the
Update Rate
 for the group.
Updates (/Sec)
The rate at which
FactoryTalk Live Data Test Client
 receives updated values for the data item. The first value is the number of updates received, and the value in parentheses is the number of updates received every second. For example, 61 (4) means that the
FactoryTalk Live Data Test Client
 received 61 updates for the data item, and that 4 updates are being received each second.
To reset this value, on the
Menu
 bar, select
Data > Reset Counters
.
Run Avg.
Shows the number of subscription updates divided by the elapsed time the data item has been subscribed.
For example, if you have a value that is not changing and you add the data item to a group, if the data item is active, the
FactoryTalk Live Data Test Client
 receives only 1 value for the data item. After 1 second, the
Run Avg.
 column = 1 / 1 = 1; after 10 seconds the data item still only has 1 update so the
Run Avg.
 column becomes 1 / 10 = 0.1.
If the data item is changing rapidly, and the update rate of the group is 250ms, then the
FactoryTalk Live Data Test Client
 receives approximately 4 updates per second. If the data server and client are both fast, the value shown in the
Run Avg.
 column is approximately 4.0. If, after 10 seconds, the
FactoryTalk Live Data Test Client
 has received 39 updates for the data item, the Run Avg. column is 39 / 10 = 3.9.
To reset this value, on the
Menu
 bar, select
Data > Reset Counters
.
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