ICP DAS USA PMC series, Руководство пользователя

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ICP DAS PMC/PMD Series User Manual
149
The user can select “User-Defined Data” in “Message Type” field to
edit the Publish Topic and its binding message on the free style
editing interface. The user interface is shown as below.
xix.
In the “QoS” field, user can select 0, 1, 2 for the QoS(Quality of
Service) setting for the Publish Message.
xx.
In the “Retain” field, user can click the “Enable” checkbox to keep the
Publish Message in the Broker.
xxi.
The timing to publish message is set in the “Auto Publish” field, there
are two options: “When the I/O channel data changed and the
variation exceeds xxx” and “Periodical Publish”. If the “When the I/O
channel data changed and the variation exceeds xxx” is selected, the
system will automatically publish the topic when the power data or
I/O channel data is changed and exceeds the evaluation value (This
option only support “Channel Data” setting in “Message Type”). If
user selects “Periodical Publish”, it mean the topic will be published
at periodic time schedule base on the value in “Periodical Publish
Interval” field.
xxii.
After completing all settings of Publish Topic, please click “OK”
button to add the Publish Topic to the Publish Message List.
xxiii.
Click the “Subscribe” tab to edit the Subscribe Topic. The user
interface is shown as below.
xxiv.
Click on “Add new Subscribe Topic” to add a new Subscribe Topic.