The Xentara Beckhoff ADS Driver v1.3
User Manual
Poll

The Poll is a type of Xentara I/O Batch that groups multiple variables to be read and written together. The write and read operations take place by invoking the poll’s read or write tasks. Also there is a timeout parameter that is used to configure the expected time duration for the tasks' execution to be finished. If a task’s execution duration surpasses the timeout value, it will be treated as a connection error.

Accessing Poll Elements

See also
Accessing Xentara Elements in the Xentara user manual
Attributes
keyThe Poll’s primary key.
nameThe Poll’s name. The name is the last component of the primary key.
UUIDThe unique UUID of the Poll.
typeThe Poll’s element type. For ADS polls, this is always “ADS poll”.
categoryThe Poll’s category. For ADS polls, this is always “transaction”.

Tasks

Tasks
readThe read task. Variables belong to this poll will be read on this task’s invocation.
Note
This task is not available for polls with “NotificationBased” strategy.
writeThe write task. Variables belong to this poll will be written on this task’s invocation.